Answers
The solution to the question is:
c is 6 = [tex]\sqrt{a^{2} + b^{2} -2abcosC }[/tex]
b is 5 = [tex]\sqrt{a^{2} + c^{2} -2accosB }[/tex]
cosB is 2 = [tex]\frac{a^{2} + c^{2} - b^{2} }{2ac}[/tex]
a is 4 = [tex]\sqrt{b^{2} + c^{2} -2bccosA }[/tex]
cosA is 3 = [tex]\frac{b^{2} + c^{2} -a^{2} }{2bc}[/tex]
cosC is 1 = [tex]\frac{b^{2} + a^{2} - c^{2} }{2ab}[/tex]
What is cosine rule?it is used to relate the three sides of a triangle with the angle facing one of its sides.
The square of the side facing the included angle is equal to the some of the squares of the other sides and the product of twice the other two sides and the cosine of the included angle.
Analysis:
If c is the side facing the included angle C, then
[tex]c^{2}[/tex] = [tex]a^{2}[/tex] + [tex]b^{2}[/tex] -2ab cos C-----------------1
then c = [tex]\sqrt{a^{2} + b^{2} -2abcosC }[/tex]
if b is the side facing the included angle B, then
[tex]b^{2}[/tex] = [tex]a^{2}[/tex] + [tex]c^{2}[/tex] -2accosB-----------------2
b = [tex]\sqrt{a^{2} + c^{2} -2accosB }[/tex]
from equation 2, make cosB the subject of equation
2ac cosB = [tex]a^{2}[/tex] + [tex]c^{2}[/tex] - [tex]b^{2}[/tex]
cosB = [tex]\frac{a^{2} + c^{2} - b^{2} }{2ac}[/tex]
if a is the side facing the included angle A, then
[tex]a^{2}[/tex] = [tex]b^{2}[/tex] + [tex]c^{2}[/tex] -2bccosA--------------------3
a = [tex]\sqrt{b^{2} + c^{2} -2bccosA }[/tex]
from equation 3, making cosA subject of the equation
2bcosA = [tex]b^{2}[/tex] + [tex]c^{2}[/tex] - [tex]a^{2}[/tex]
cosA = [tex]\frac{b^{2} + c^{2} -a^{2} }{2bc}[/tex]
from equation 1, making cos C the subject
2abcosC = [tex]b^{2}[/tex] + [tex]a^{2}[/tex] - [tex]c^{2}[/tex]
cos C = [tex]\frac{b^{2} + a^{2} - c^{2} }{2ab}[/tex]
In conclusion,
c is 6 = [tex]\sqrt{a^{2} + b^{2} -2abcosC }[/tex]
b is 5 = [tex]\sqrt{a^{2} + c^{2} -2accosB }[/tex]
cosB is 2 = [tex]\frac{a^{2} + c^{2} - b^{2} }{2ac}[/tex]
a is 4 = [tex]\sqrt{b^{2} + c^{2} -2bccosA }[/tex]
cosA is 3 = [tex]\frac{b^{2} + c^{2} -a^{2} }{2bc}[/tex]
cosC is 1 = [tex]\frac{b^{2} + a^{2} - c^{2} }{2ab}[/tex]
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Related Questions
What is the slope of the line y=-2x+3?
A. 3
B. -2
C. -3
D. 2
Answers
The first step that we must take before solving a problem is to understand what the problem statement is asking us to do and what is given to us to do so. Looking at the problem they are asking what the slope of the line is. What is provided to us is an equation which was captured as [tex]y=-2x + 3[/tex].
The next step that we must take is to determine what the slope of the line is. Let us first define what slope is.
Slope ⇒ Slope is the rate of change which can be expressed in an equation. For example, if a student buys 4 books per semester, the rate of change would be 4 as for every semester the student would add another 4 books.Slope-Intercept form is a form in which an equation can be expressed in and it follows the y = mx + b format. M is equal to the slope while b displays the y-intercept of the expression.
The easiest way to determine the slope using slope-intercept form us by looking at the coefficient of the variable x (in this case) which is also known as m. Looking at our equation, we can see that the coefficient in front of the variable x is -2.
Therefore, the option that would best match the details that we provided would be option B, -2.
Answer:
B. -2
General Formulas and Concepts:
Algebra I
Slope-Intercept Form:
[tex]\displaystyle y = mx + b[/tex]
Step-by-step explanation:
Step 1: Define
Identify given equation.
[tex]\displaystyle y = -2x + 3[/tex]
Step 2: Find Slope m
Let's compare our given equation to the general equation Slope-Intercept Form to identify our values for slope m and y-intercept b:
Compare:[tex]\displaystyle\begin{aligned}y & = mx + b \\y & = -2x + 3 \\\end{aligned}[/tex]
We can see that our y-intercept b is equal to 3 and that our slope m is equal to -2.
∴ the slope of the given line is equal to -2 and the answer choice that correlates with this is answer choice B.
___
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Topic: Algebra I
Match the function in the left column with its period in the right column.
Answers
The results for the matching between function and its period are:
Option 1 - Letter DOption 2 - Letter AOption 3 - Letter COption 4 - Letter BWhat is a Period of a Function?If a given function presents repetitions, you can define the period as the smallest part of this repetition. As an example of periodic functions, you have: sin(x) and cos(x).
[tex]\mathrm{Period\:of\:}a\cdot \cos \left(bx\:+\:c\right)\:+\:d=\frac{\mathrm{periodicity\:of}\:\cos \left(x\right)}{|b|}[/tex]
[tex]\mathrm{Period\:of\:}a\cdot \sin \left(bx\:+\:c\right)\:+\:d=\frac{\mathrm{periodicity\:of}\:\sin \left(x\right)}{|b|}[/tex]
The period of sin(x) and cos(x) is 2π.
For solving this question, you should analyze each option to find its period.
1) Option 1
[tex]\mathrm{Periodicity\:of\:}a\cdot \cos \left(bx\:+\:c\right)\:+\:d=\frac{\mathrm{periodicity\:of}\:\cos \left(x\right)}{|b|}\\ \\ \mathrm{Periodicity\:of\:}a\cdot \cos \left(bx\:+\:c\right)\:+\:d=\frac{2\pi }{\frac{1}{2} }=4\pi[/tex]
Thus, the option 1 matches with the letter D.
2) Option 2
[tex]\mathrm{Period\:of\:}a\cdot \sin \left(bx\:+\:c\right)\:+\:d=\frac{\mathrm{periodicity\:of}\:\sin \left(x\right)}{|b|}\\ \\ \mathrm{Period\:of\:}a\cdot \sin \left(bx\:+\:c\right)\:+\:d=\frac{2\pi}{4} =\frac{\pi }{2}[/tex]
Thus, the option 2 matches with the letter A.
3) Option 3
[tex]\mathrm{Periodicity\:of\:}a\cdot \cos \left(bx\:+\:c\right)\:+\:d=\frac{\mathrm{periodicity\:of}\:\cos \left(x\right)}{|b|}\\ \\ \mathrm{Periodicity\:of\:}a\cdot \cos \left(bx\:+\:c\right)\:+\:d=\frac{2\pi}{2} =\pi[/tex]
Thus, the option 3 matches with the letter C.
4) Option 4
[tex]\mathrm{Period\:of\:}a\cdot \sin \left(bx\:+\:c\right)\:+\:d=\frac{\mathrm{periodicity\:of}\:\sin \left(x\right)}{|b|}\\ \\ \mathrm{Period\:of\:}a\cdot \sin \left(bx\:+\:c\right)\:+\:d=\frac{2\pi}{8} =\frac{\pi }{4}[/tex]
Thus, the option 4 matches with the letter B.
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11. Find the coordinates of the point located six units behind the yz- plane, seven units to the right of the xz - plane, and eight units above the xy-plane. O x = -6, y = 7, z =-6 O x = -6, y = 7, z = 8 Ox=7, y = 7, z = 8 O x = 6, y= 7, z = 8
Answers
Answer: I think
Step-by-step explanation:Let the coordinate of the point be (x,y,z). Since the point is located 3 units behind the YZ− plane, 4 units to the right of XZ− plane and 5 units above the XY−plane ,x=−3,y=4 and z=5 Hence, coordinates of the required points are (−3,4,5)
Which point on the number line most closley represents 1.ModifyingAbove 6 with bar?
A number line going from negative 6 to positive 6. Point A is between negative 2 and negative 1, point B is between 0 and 1, point C is 1, point D is between 1 and 2.
A
B
C
D
Answers
The correct answer is option D.The point 1.6 with bar will be lies between 1 and 2.
The image of the question is attached with the answer below:-
What is a number line?The number line is the line on which real numbers are marked with the same interval between them. Number lines are used to mark any point of the real number on the line.
We can see in the image that A, B, C and D points are marked on the number line. The line is marked with real numbers that are integers.1.6 bar number will lie between 1 and 2 numbers.
Therefore the correct answer is option D.The point 1.6 with a bar will be lies between 1 and 2.
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Answer:
D
Step-by-step explanation:
Cindy wants to put new carpet in her entryway. The entryway is 15ft. long and 7ft. wide. She wants to buy 10% extra carpet in case it is needed. How much carpet will she need to order?
Answers
Answer:
10.5
Step-by-step explanation:
quick math
Write an inequality for the graph shown below.
Use x for your variable.
-11-10-9 -8 -7 -6 -5 -4 -3 -2 -1 0
4
2
w.
O
ロマロ
X
S
6 7 8
口<口
S
9 10 11 X
OSO
?
Answers
Step-by-step explanation:
x is less than or equal to 0.
so click x than the choose the third option then click 0
4 Solve these inequalities. Show the solutions on the number lines.
a 4v-2 > 16
b 6 ≥ 2(w-7)
0
5 a Write as a recurring decimal.
b Convert 0.45 to a fraction.
(5 marks)
Answers
Answer:
a) v>4.5
b) w<6.5
a) 0.3 recurring
b) 5/11
the average of 5 girls is 6 yrs. the average of 4 of them is 16½. what is d age of d fifth gal
Answers
Answer:
This assumes the question should read:
"The average of 5 girls is 16 [not 6] yrs. the average of 4 of them is 16½. what is d age of d fifth gal
The age, d, is 14 years.
Step-by-step explanation:
When the girl with age d is not included, the average goes up to 16.5 years. Let's define GroupA as the sum of the ages of the 4 girls whose average age is 16.5 years. d is the age of the girl that is removed from the average.
We know that all the girls (GroupA + d) have an average age of 16 years:
(GroupA + d)/5 = 16 years [Add the ages for all the girls (GroupA and d) and divide by 5 to obtain the average age for the larger group].
We know that when d is removed, the average for the 4 remaining girls (GroupA) is 16.5 years:
(GroupA)/4 = 16.5 years
This tells us the sum of the ages for GroupA:
GroupA = 4*(16.5)
GroupA total = 66 years
From above: (GroupA + d)/5 = 16 years
Since GroupA = 66 years, (66 years + d)/5 = 16 years
(66 years + d) = 90 years
d = 14 years
The Answer please!!!!!!!!!!
Answers
The number of seeds in 2 ounce package is 6.7 × 10⁷ seeds
Calculating quantityFrom the question, we are to determine the number of seeds in 2 ounce package
From the given information,
An orchid seed weighs 3.2 × 10⁻⁸ ounces
If an orchid seed weighs 3.2 × 10⁻⁸ ounces
Then,
2 ounce package will contain [tex]\frac{2}{3\times 10^{-8} }[/tex] seeds
= 0.67 × 10⁸
= 6.7 × 10⁷ seeds
Hence, the number of seeds in 2 ounce package is 6.7 × 10⁷ seeds
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25 Select the correct answer. What is the average rate of change of f(x), represented by the graph, over the interval [-1, 2]? A. -2.5 B. -2 C. 2.5 D. 3 E. 6
Answers
The average rate of change of the function over the interval [-1, 2] is: C. 2.5.
How to Find the Average Rate of Change?The average rate of change over an interval of a function is: f(b) - f(a) / b - a.
Given the interval [-1, 2]:
a = -1; f(a) = -5
b = 2; f(b) = 2.5
Average rate of change = (2.5 - (-5)) / (2 - (-1)) = 7.5/3
Average rate of change = 2.5 (option C).
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You have combined different polygons to create a polyhedron to approximate a sphere. The sum of all the faces of the polyhedron is about 78.5 square meters. Estimate the radius of the sphere.
Answers
Since the polyhedron is about 78.5 m², the radius of the sphere is 2.5 m
Since the sum of the faces of the polyhefron equals the surface area of the sphere, we find its surface area.
What is the surface area of sphere?The surface area of sphere is given by A = 4πr² where r = radius of sphere
Radius of the sphereMaking r subject of the formula, we have
r = √(A/4π)
Given that he sum of all the faces of the polyhedron is about 78.5 square meters, this is equal to the surface area of the sphere.
So, A = 78.5 m²
Substituting this into the equation for r, we have
r = √(A/4π)
r = √(78.5 m²/4π)
r = √(19.625 m²/π)
= √(6.246 m²)
= 2.499 m
≅ 2.5 m
So, the radius of the sphere is 2.5 m
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Which expression is equivalent to 12b + 3a? choices: a (a + b) x 12 b 3 (4b + a) c ab x 12 x 3 d (12 x 3) + (b x a)
Answers
Answer:
The answer to the equation is B.
Step-by-step explanation:
Answer:
i took the test and its B
Step-by-step explanation:
Express the quotient as a fraction in simplest form
-5/7 ÷ 6/7
A. 5/6
B. -30/49
C. 30/49
D. 5/6
Answers
Answer:
-5/6
Step-by-step explanation:
A great way to divide fractions is to use the "leave it, change it, flip it" method. You leave the first fraction as it is, change the division sign to a multiplication sign, and flip the second fraction so you get the reciprocal. Like this:
-5/7 ÷ 6/7
-5/7 x 6/7
-5/7 x 7/6
Then you multiply through. First -5 x 7, -35, and then 7 x 6, 42, to get -35/42. Because both of these are divisible by 7, we can simplify to get -5/6.
Answer:
-5
6
Step-by-step explanation:
⇒ [tex]\frac{-5}{7}[/tex] ÷ [tex]\frac{6}{7}[/tex]
⇒ [tex]\frac{-5}{7}[/tex] × [tex]\frac{7}{6}[/tex]
(We do this because when dividing a fraction by another fraction we take the inverse of the second fraction and multiply it to the first fraction.)
⇒ -5 × 7 = -35 (to simplify just divide both by 7) = -5
7 × 6 42 6
So the answer is -5
6
Guys, can you please help me with The Question #47 of The Quadratic Relations for me, please? :)
Answers
Answer:
[tex]y=\dfrac{1}{2}(x+5)^2-3[/tex]
Step-by-step explanation:
Translations
For [tex]a > 0[/tex]
[tex]f(x+a) \implies f(x) \: \textsf{translated}\:a\:\textsf{units left}[/tex]
[tex]f(x)-a \implies f(x) \: \textsf{translated}\:a\:\textsf{units down}[/tex]
[tex]y=a\:f(x) \implies f(x) \: \textsf{stretched parallel to the y-axis (vertically) by a factor of}\:a[/tex]
[tex]y=-f(x) \implies f(x) \: \textsf{reflected in the} \: x \textsf{-axis}[/tex]
Parent function
[tex]y=-x^2[/tex]
Reflected in the x-axis
[tex]-f(x) \implies y=-(-x^2)\implies y=x^2[/tex]
Compressed vertically by a factor of 1/2
Multiply the whole function by the given scale factor:
[tex]\dfrac{1}{2}f(x)\implies y=\dfrac{1}{2}x^2[/tex]
Translated 3 units down
Subtract 3 from the whole function:
[tex]f(x)-3 \implies y=\dfrac{1}{2}x^2-3[/tex]
Translated 5 units left
Add 5 to the variable of the function:
[tex]f(x+5) \implies y=\dfrac{1}{2}(x+5)^2-3[/tex]
To sketch the parabola
Vertex = [tex](-5, -3)[/tex]
Axis of symmetry: [tex]x = -5[/tex]
Plot points:
[tex]x=-9 \implies \dfrac{1}{2}(-9+5)^2-3=5 \implies (-9,5)[/tex]
[tex]x=-7 \implies \dfrac{1}{2}(-7+5)^2-3=-1 \implies (-7,-1)[/tex]
[tex]x=-3 \implies \dfrac{1}{2}(-3+5)^2-3=-1 \implies (-3,-1)[/tex]
[tex]x=-1 \implies \dfrac{1}{2}(-1+5)^2-3=5 \implies (-1,5)[/tex]
5x – 2x + 7 – x = ?x + ?
I need the answer for "no solution" and "infinite solutions".
(preferably with an explanation)
thanks to anyone who helps
Answers
Step-by-step explanation:
5x – 2x + 7 – x = ?x + ?
I need the answer for "no solution" and "infinite solutions".
NO SOLUTION:
no solution because any value you give to x is not solvable, it remains +7
5x – 2x + 7 – x = ?x + ?
2x = 2x + 7
INFINITE SOLUTION
infinite solutions because any value you give to x is solvable
5x – 2x + 7 – x = ?x + ?
5x – 2x + 7 – x = 2x + 7
2x + 7 = 2x + 7
PLEASE HELP ILL MAKE YOU BRAINIEST
Answers
Answer:
obtuse
Step-by-step explanation:
A "form factor" can be computed whose sign will tell you the classification of the triangle. For short sides a, b and long side c, the form factor is ...
f = a² +b² -c²
And the interpretation is ...
f > 0 . . . acutef = 0 . . . rightf < 0 . . . obtuse__
form factorFor the given side lengths, the form factor is ...
f = 11² +15² -20² = 121 +225 -400
f = -54
interpretationThe value is less than zero, signifying an obtuse triangle.
_____
Additional comment
The value f/(2ab) = -54/(2·11·15) = -9/55 is the cosine of the largest angle. Here, the largest angle is arccos(-9/55) ≈ 99.4°. This is greater than 90°, hence an obtuse angle.
This cosine relation comes from the Law of Cosines. The interpretation of the "form factor" can be developed by considering the Pythagorean theorem (f=0 ⇒ right triangle) and the relationship between sides and angles. If the longest side is longer than necessary for a right triangle, the largest angle will be greater than 90°.
4+√x+1=5
I need the answer to this question
Answers
Answer:
x=0
Step-by-step explanation:
Expand the equation 4 + [tex]\sqrt{x}[/tex]+1=5
[tex]\sqrt{x} +5=5[/tex]
-5 -5
subtract 5 from both sides
[tex]\sqrt{x} = 0[/tex]
x=0
square both sides
True= x=0
Answer:
the answer is x=0
Step-by-step explanation:
[tex]4+\sqrt{x} +1=5[/tex]
add "4 +1" which equals 5
[tex]\sqrt{x} +5=5[/tex]
now -5 on both sides :)
[tex]\sqrt{x}[/tex]
now you're left with a square root
[tex]\sqrt{x}=0[/tex]
What is the solution of 5/2-7= 3/4x+14,
O A.
x=-6
O B.
x=6
OC.
X=8
O D. x=12
Answers
Answer:
D) x = 12
Step-by-step explanation:
Given:
[tex]\sf{\dfrac{5}{2}x-7=\dfrac{3}{4}x+14 \implies \dfrac{10}{4}x-7=\dfrac{3}{4}x+14}[/tex]
1. Multiply both sides by 4
[tex]\sf{4\left(\dfrac{10}{4}x-7\right)=4\left(\dfrac{3}{4}x+14\right)}\\\\\implies 10x-28=3x+56[/tex]
2. Subtract 3x from both sides
[tex]\sf{10x-3x-28=3x-3x+56}\\\\\implies 7x-28=56[/tex]
3. Add 28 to both sides
[tex]\sf{7x-28+28=56+28}\\\\\implies 7x=84[/tex]
4. Divide both sides by 7 to isolate the variable:
[tex]\sf{\dfrac{7x}{7}=\dfrac{84}{7}}\\\\\implies x=12[/tex]
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what is the the value of m in the equation 1/2m-3/4n=16, when n=8
Answers
explanation:
1/2m-3/4(8)=16
just fill substitute the n for 8 and then find the value of m
2а + 20 = -3а - 5 pls help
Answers
Answer: A= -5
Step-by-step explanation:
Answer: a = 5
Step-by-step explanation:
To solve, we will isolate the variable a.
Given:
2а + 20 = -3а - 5
Add 3a to both sides of the equation:
5а + 20 = - 5
Subtract 20 from both sides of the equation:
5а = 25
Divide both sides of the equation by 5:
a = 5
Solve the system of equations:
y=2x
y=x²-8
Answers
x^2 - 8 = 2x
x^2 - 2x - 8 = 0
Factor
(x - 4)(x + 2) = 0
x = 4 or x = -2
Plug in 4
y = 2x or y = x^2 - 8
y = 2(4) or y = 4^2 - 8
y = 8
Plug in -2
y = 2x or y = x^2 - 8
y = 2(-2) or y = (-2)^2 - 8
y = -4
There are two solutions
(4, 8) and (-2, -4)
Which shows one way to determine the factors of x³ + 5x² - 6x - 30 by grouping?
O x(x²-5) + 6(x²-5)
O x(x² + 5)-6(x² + 5)
O x²(x - 5) + 6(x - 5)
O x²(x + 5)-6(x + 5)
Answers
Answer:
last option
Step-by-step explanation:
hope it helps
One way to determine the factors of x³ + 5x² - 6x - 30 by grouping is shown by option D. x² (x + 5) - 6(x + 5).
What are Polynomials?Polynomials are mathematical expressions which consist of one or more terms involving variables and coefficients connected with operations like multiplication, subtraction, addition and natural number powers of variables.
Given a cubic polynomial,
x³ + 5x² - 6x - 30
Taking the first two terms together and the other two terms together,
(x³ + 5x²) + (- 6x - 30)
Taking x² common from first and -6 common from second,
x² (x + 5) - 6(x + 5)
Hence the correct option is D.
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I'LL MARK BARINLEST!!!(With the help of the drawing tool, create a box plot using the data in Table 1.)
-------------------------------------
TABLE 1
----------------
height(Inches)
--------------------
61-64-62
55-66-65
58-60-63
63-58-59
62-64-67
57-61-57
65-58-59
62-57-61
Answers
Answer:
Median
Order the data values from smallest to largest:
55, 57, 57, 57, 58, 58, 58, 59, 59, 60, 61, 61, 61, 62, 62, 62, 63, 63, 64, 64, 65, 65, 66, 67
As there is an even number of values, the median is the mean of the middle two values ⇒ Median = 61
Quartiles
55, 57, 57, 57, 58, 58, 58, 59, 59, 60, 61, 61 || 61, 62, 62, 62, 63, 63, 64, 64, 65, 65, 66, 67
The first quartile is the median of the data points to the left of the median ⇒ first quartile = 58
The third quartile is the median of the data points to the right of the median ⇒ first quartile = 63.5
Five-number summary
Minimum: 55First quartile Q1: 58Median Q2: 61Third quartile Q3: 63.5Maximum: 67Draw a box from the first quartile (58) to the third quartile (63.5)
Add the median (61) as a the vertical line through the box.
The whiskers are horizontal lines from each quartile to the minimum (55) and maximum values (67).
What is the value of a in the equation? 22 = startfraction a over 11 endfraction 2 33 222 242
Answers
Answer:
D / 242
Step-by-step explanation:
hope this helps!
75 points! what is the lateral area?
Answers
Answer:
48 units²
Step-by-step explanation:
Lateral Surface Area :
Area of the side faces (exclude the base)4 x 1/2 x 8 x 32 x 2448 units²Answer:
48 units²
Step-by-step explanation:
The lateral area of a square based pyramid comprises the four triangular sides.
Area of a triangle = 1/2 × base × height
= 1/2 × 8 × 3
= 1/2 × 24
= 12 units²
Lateral SA = 4 × area of triangle
= 4 × 12
= 48 units²
If the bowl contains 5 red marbles 7 blue marbles and 8 white marbles what is the probability you will draw a blue and red marble when you pick one out?
5/20
15/20
7/20
2/5
Answers
Answer:
none of those are correct.
Step-by-step explanation:
5 red
7 blue
8 white
5 red + 7 blue= 12
5 red + 7 blue + 8 white= 20
=12/20
=6/10
=3/5what is the slope-intercept equation of the line that includes the points in the table?
Answers
Answer:y=5x+1
Step-by-step explanation:the y intercept is the y value when x=0 which we can read off as run. Slope =rise/run=(change in y value)/(change in x value) for any two points.
Point L is located at (-1,-6). Determine the coordinates of point L’ after a translation 7 units to the left and 6 units up.
Answers
Answer:(-8,0)
Step-by-step explanation:
Add (-1,-6) with translation move (-7,6)
-1 , -6
-7 , 6
____
-8 , 0
Do ∠ABE and ∠DBC share a ray
Answers
Answer:
yes they do
Step-by-step explanation:
they share a ray
5. What is the measurement of each angle?
Answers
Answer:
x=14
Step-by-step explanation:
The sum of a interior angle is 180°
(7x-11)+(2x-3)+(5x-2)°=180°
7x+2x+5x=180+11+3+2
14x/14=196/14
x= 14
Hope this answers your question!! :)