Answer:
-4,2
Step-by-step explanation:
a reflection across the y axis means the y values stay the same and the x values change sign
The table above shows the number of hours that Robin worked each week for 5 weeks. What would be the number of hours Robin worked in days?
The height of the Statue of Liberty is 305 feet. Nicole, who is standing next to the statue, casts a 6-foot shadow. She is 5 feet tall. How long should the shadow of the statue be?
Answer:
Create a proportion.
[tex]\frac{5}{6} = \frac{305}{x}\\[/tex]
This proportion is saying,
"If 5 corresponds to 6, then 305 corresponds to what?"
Cross multiply.
5x = 305(6)
5x = 1830
x = 1830 / 5
x = 366
So, the shadow of the statue should be 366 feet.
What is an equation of the line that passes through the points (6,8) and (-3,2)
Answer:
y = 2/3x + 4
Step-by-step explanation:
Let the equation of the line be y = mx + c
m = (2-8)/(-3-6) = 2/3
sub (6, 8):
8 = 2/3(6) + c
c = 4
the equation if the line is y = 2/3x + 4
This is a question on coordinate geometry. If you wish to venture further into it/understand this topic better, you may want to follow my Instagram account (learntionary), where I post some of my own notes on certain topics and also some tips that may be useful to you :)
Solve by factorization
8+7x-x^2=0
Answer:
x = - 1, x = 8
Step-by-step explanation:
Given
8 + 7x - x² = 0 ( multiply through by - 1 and arrange into standard form )
x² - 7x - 8 = 0 ← in standard form
(x - 8)(x + 1) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 1 = 0 ⇒ x = - 1
x - 8 = 0 ⇒ x = 8
2.(X+3) > 5. (3x + 1)
Answer:
3x+1 > 7
Step-by-step explanation:
x+3 > 5
x > 5-3
x > 2
3(x)+1
= 3(>2)+1
= 3x+1 > 7
Hope this helped!
Consider the formula for the average velocity, v, of a moving particle. In the formula, d1 and d2 represent the distance traveled by the particle at times t1 and t2 respectively.
k2=144. What is the square root
Estimate the solution of the system of equations. Write the answer as an ordered pair.
Whats the solution
PLEASE HELP! I will give brainliest
A) y intercept is (0,3)
C) Axis of symmetry is x = -1
D) Vertex is (-1, 4)
So basically everything but choice B is true.
========================================
Explanation:
Choice A is true because plugging in x = 0 leads to y = 3. Effectively, anything with an x goes away when x = 0 leaving that 3 behind. So finding the y intercept in this form is fairly fast.
-------------------
To check choices B through D, let's convert the equation into vertex form.
y = -1x^2 - 2x + 3 is in the form y = ax^2 + bx + c where
a = -1
b = -2
c = 3
The vertex is located at (h,k) such that h = -b/(2a)
Plug the values of 'a' and 'b' into the equation below
h = -b/(2a)
h = -(-2)/(2*(-1))
h = 2/(-2)
h = -1
The x coordinate of the vertex is x = -1
Then use this to find the y coordinate of the vertex
y = -1x^2 - 2x + 3
y = -1(-1)^2 - 2(-1) + 3
y = 4
The y coordinate of the vertex is 4, meaning k = 4
The vertex overall is (h,k) = (-1, 4)
This shows choice D is true, meaning choice B has to be false.
Choice C is true because the axis of symmetry is the x coordinate of the vertex. This is the vertical line that cuts the parabola into two mirrored halves. This vertical line always goes through the vertex.
Quadrilateral BCDE is a rhombus. What is DE?
D
с
9z
E
2+72
B
Answer:
DE = 81
Step-by-step explanation:
The sides of a rhombus are congruent , thus
9z = z + 72 ( subtract z from both sides )
8z = 72 ( divide both sides by 8 )
z = 9
Then
BC = 9z = 9 × 9 = 81
Since the sides are congruent, then DE = 81
5x-9y=17 solve for y
Answer: y=17-5x/-9
Step-by-step explanation: 5x-9y=17
-9y=17-5x
Y=17-5x/-9
You can’t go any further than that because you can’t combine unlike Terms on the right side of the equation.
Please help. this is really confusing
====================================================
Explanation:
Inscribed angle ADB subtends the minor arc AB. Inscribed angle ACB subtends the same minor arc AB. The rule is that if two inscribed angles subtend the same arc, then they are the same measure.
We can prove this with the inscribed angle theorem which says
central angle = 2*(inscribed angle)
Let's say point E is the center of the circle. By the inscribed angle theorem, we know that,
angle AEB = 2*(angle ADB)
angle AEB = 2*43
angle AEB = 86
Then we go in reverse of this process to find angle ACB
angle AEB = 2*(angle ACB)
86 = 2*(angle ACB)
2*(angle ACB) = 86
angle ACB = 86/2
angle ACB = 43
So this is how we prove the two inscribed angles are congruent.
The number of boys and girls in a school are in the ratio 5: 7. What is the number of girls of 1200 boys are there in the school.
Answer:
1680 girls
Step-by-step explanation:
if the amount of boy is 5/1200 you divide 5 by 1200 to get 240 so multiply 240 by 7
apply appropriate methods in solving rationalequations and inequalities.
Amy has 72 sweet keeps 1/4 for herself and shares the rest with a friend how many sweet will she give her friend
Answer:
54
Step-by-step explanation:
1/4 of 72 is 18
72-18=54
Answer:
She would give her friend 54 sweets. I hope this is right, sorry if it's not.
Step-by-step explanation:
1/4 = 0.25
72*0.25 = 18
72 - 18 = 54
Sandy buys school supplies at Office Depot and spends $27.97 . How much will she spend if she uses a 10% off coupon
Answer:
$25.17
Step-by-step explanation:
10 percent of 27.97 is 2.80 so the answer is 25.17
correct if wrong pls
Every week, a car dealer ship sells at least 5 minivans. Write an inequality that represents this situation. Let c represent the number of minivans sold each week.
Answer:
we conclude that an inequality 'c ≥ 5' denotes this situation.
Step-by-step explanation:
Given
A car dealer ship sells at least 5 minivansWhen we talk about 'at least', it means we are talking about '≥' in terms of representing the 'at least' in inequality symbol.
For instance,
'm≥n' means 'm' is greater than or equal to 'n'.
It means 'm' is at least equal to 'n'.
Coming back to the question,
Let 'c' represent the number of minivans sold each week.As the car dealer ship sells at least 5 minivans. so the
inequality will be: c ≥ 5
Thus, we conclude that an inequality 'c ≥ 5' denotes this situation.
What is an equation of the line that passes through the point (-1, 4) and is perpendicular to the line x - 6 y equals 12
Answer:
y = -6x - 2.
Step-by-step explanation:
x - 6y = 12
Gradient = 1/6
since the line is perpendicular to x - 6y = 12
its gradient will be -6.
hence its equation will also be:
y - 4 = -6(x - (-1))
y - 4 = -6x -6
y = -6x -2
Find the domain and Range
f(x)= 2/7x-2
Answer:
Domain: {x|x∈R}
Range: ,{y|y∈R}
Step-by-step explanation:
If you understand similar figures you will get this because I don't
Answer:
I think its 3 but im not sure
Step-by-step explanation:
2x-1 you would do the opposite so you would add 1 to both sides. That would cancel the -1. Which leaves you with 3x
9 is 25% of what number?
9 is 10% of what number?
9 is 75% of what number?
9 is 150% of what number?
Answer:
1. 36
2. 90
3. 9
4. 6
Step-by-step explanation:
Solve this system of equations, then determine what y equals.
x + 5y= 7
2x + 4y = -4
Answer:
y = 3.
Step-by-step explanation:
x + 5y = 7
x = 7 - 5y
Substitute x for 7 - 5y in the second equation.
2 ( 7 - 5y ) + 4y = -4
14 - 10y + 4y = -4
14 - 6y = -4
6y = 14 + 4
6y = 18
y = 3.
Hope this helped!
Answer:
y = 3
Step-by-step explanation:
x + 5y = 7
Subtract 5y from both sides;
x = -5y + 7
Substitute x into the equation;
2x + 4y = -4
2(-5y + 7) + 4y = -4
Distribute;
-10y + 14 + 4y = -4
-6y + 14 = -4
Subtract 14 from both sides;
-6y = -18
Divide both sides by -6
y = 3
Substitute y;
x + 5y = 7
x + 5(3) = 7
x + 15 = 7
Subtract 15 from both sides;
x = -8
Which relation is a function?(click all that apply)
Answer:
Step-by-step explanation:
y=2x+1
y=x^2
The other one isn't a function because it won't pass the vertical line test. You can not use the same X in a function.
15. Joey indicated that the Bayugan City can be found at coordinates (-1 1/2,0). Do you agree with Joey? Why or why not?
Answer:
The answer is "False".
Step-by-step explanation:
In this question, I disagree with Joey since the town of Bayugan has been at co-ordinates (0,[tex]-1\frac{1}{2}[/tex]) which would be contradictory to Joey.
yea im very slow so i need the answer pleaseeee!!
Answer:
I am thinking that the answer is B.
Step-by-step explanation:
INTERMEDIATE LEVEL
7. Devi folded a sheet of paper into an envelope, as
shown in the figure. In the figure, ZAED = ZADB
= ZBCD = 90°. To seal the envelope, she has to
apply glue along AD and DB. Given that AE = ED
= 8 cm and DC = BC = 14 cm, find the total length
of the sides along which the glue has to be applied
to seal the envelope.
B
A
14 cm
8 cm +
E
D
С
Theres supposed to be a picture i think.
Please help!!!!!!!!
[tex]d. \: \frac{hi}{eg} = \frac{ij}{jk} [/tex]
dont forget to follow me
3w - 17 = 4?
Pls help me
[tex]\text {Hey! Let's Solve this Equation!}[/tex]
[tex]\text {\underline {The First Step is to Add 17}}[/tex]
[tex]\text {3w-17+17=4+17}[/tex]
[tex]\text {3w=21}[/tex]
[tex]\text {\underline {The Final Step is to Divide 3}}[/tex]
[tex]\text {3w/3=21/3}[/tex]
[tex]\text {Your Answer Would Be:}[/tex]
[tex]\Huge\boxed {w=7}[/tex]
[tex]\text {Best of Luck!}[/tex]
Answer:
[tex]\boxed{\sf{w=7}}[/tex]
Step-by-step explanation:
To find the value of w, isolate it on one side of the equation.
3w-17=4Add by 17 from both sides.
3w-17+17=4+17
Solve.
Add the numbers goes from left to right.
4+17=21
3w=21
Divide by 3 from both sides.
3w/3=21/3
Solve.
Divide the numbers from left to right.
21/3=7
w=7
Therefore, the solution is w=7.I hope this helps! Let me know if you have any questions.
what is the length of AC?
Answer:
126
Step-by-step explanation:
x=24
140-24= 126
What is the y-intercept of function f?
Answer: it’s not 5 I got that wrong
Step-by-step explanation:
y-intercept of function f is 1.
What is a function?Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).
Given function
f(x) = -3x -2 , -∞ < x < -2
= -x + 1, -2 ≤ x < 3
= 2x + 5, 3 ≤ x < ∞
For y-intercept, x =0, f(x) = -x + 1 [∵ -2 < 0 < 3]
f(0) = -0 + 1
= 1
Hence, y-intercept of function f is 1.
Find out more information about function here
https://brainly.com/question/12431044
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