Answers
x = y + 2
3x + 4y = 8x - 20
From the first equation y = x - 2. Substitute for y in the second equation.
3x + 4(x - 2) = 8x - 20
3x + 4x - 8 = 8x - 20
7x = 8x - 12
So x = 12
You should always check your answers for simultaneous equations
y = 10 because x = y + 2
3 x 12 + 4 x 10 = 8 x 12 - 20?
36 + 40 = 96 - 20. This is true!
For a multi choice problem it would be faster to just try each value until one works
Related Questions
Nicole buys a meal in a town with a 9% sales tax. She tips 17% on the bill before adding the sales tax. She pays a total of $15.30. What should be the original cost of her meal?
Answers
Answer:
17/100×15.30=2.60
9/100×15.30=1.37
15.30-(1.37+2.60)=11.33
in . 3.5 in 4 9 in 4 in . The triangular prism above has been created with two equilateral triangles and three congruent rectangles . The height of the triangles is 3.5 inches . Find the surface area of the triangular prism . square inches
Answers
Answer:
122 in²
Step-by-step explanation:
Applying,
S.A = bh+ bl+bl+bl............. Equation 1
Where S.A = Surface area of the prism, b = base of the triangle, h = height of the triangle, l = lenghth of the prism
From the question,
Given: b = 4 in, h = 3.5 in, l = 9 in
Substitute these values into equation 1
S.A = 4×3.5+9×4+9×4+9×4
S.A = 14+108
S.A = 122 in²
Hence the surface area of the prism is 122 in²
Please tell me how to slove this?
Answers
Answer:
:)
Step-by-step explanation:
ok so first you have to find the area of the white triangles, so the first one is 2 x 4= 8 cm2 and the second one is 3 x 2.5= 7.5 cm2, 8+7.5= 15.5 cm2, so the non-shaded region is 15.5 cm2, ok now find the area of the whole rectangle and subtract 15.5 from it hope this helped :)
If h(x) = 5 – 7x^2. what is h(-1)?
Answers
Value of function h(x) = [tex]5-7x^{2}[/tex] for variable [tex]x=-1[/tex] is equals to -2.
What is variable?
" A variable is defined as the quantity whose value gets change as per the mathematical situation."
According to the question,
Given function,
[tex]h(x) = 5-7x^{2}[/tex]
Substitute the value of the variable [tex]x=-1[/tex] we get,
[tex]h(-1)= 5-7(-1)^{2}[/tex]
[tex]= 5-7\\=-2[/tex]
Hence, Value of function h(-1) is equals to -2 for the variable [tex]x=-1[/tex].
Learn more about variables here
https://brainly.com/question/15740935
#SPJ2
Find sin (B) in the triangle.
A) 4/3
B) 3/5
C) 3/4
D) 4/5
Answers
Answer:
D) 4/5 that's the answer
Triangle ABC ~ Triangle DEF. Measure of angle A = 30 degrees and measure of angle F = 65 degrees. AB=20, DE = 35, EF= 28.
Find measure of angles B, E, D and C and the length of BC.
Answers
Answer:
< B = 180-30-65=85°
< E = 85°
< D = 30°
< C = 65°
BC = 20/35 × 28 = 16
Find the measure of y, round to the nearest tenth
Answers
Answer:
y = 8
Step-by-step explanation:
cos = adj/hyp
cos30 = 4√3 / y
y = 4√3 / cos30
y = 6.928203230275509 / 0.866025403784439
y = 8
PLEASE HELP LIKE RIGHT NOW LOL
Identify all expressions equivalent to 3.8-2-1.
4
0 6₃3
-1 + 3
3
4.5-1
3
•8+1
4.
Answers
Answer:
It's definitely not the first one or the second one, not sure about the third one but the last one is equivalent to it.
3/4 x . 8 = 6
2-1=1
5 There are 150 men and 250 women in a crowd.
a What fraction of the crowd are men?
Write your answer in its simplest possible form.
b The ratio of married women to unmarried women is 3 to 2.
How many married women are in the crowd?
C More men arrive. The number of men increases by 20%.
How many men are in the crowd now?
d Some of the women leave.
There are now 60 women in the crowd.
What percentage of the women leave?
Answers
Answer:
men=150
women=250
total=400
Step-by-step explanation:
a) fraction of men
men/total=150/400=15/40
men/total =3/8
b)let married be x
so unmarried wil be 250-x
married/unmarried=3/2
x / 250-x =3/2
x =3(250-x)/2
2x =750-3x
5x=750
x=750/5
x =150
married =150
unmarried=250-150=100
c)20% of men will be :20x150
100
: 30
no of men =150+20%
=150+30
=180
d)no. of women decreased=250-60
=190
percentage of women leaved=% x 250
100
190x100/250=%
76 =%
76% women leaved
It took too much time
MARK ME BRAINLIEST THANKS MY ANSWER PLEASE
DO FOLOW
8. A
out
7. Shonte has $300 in her checking account. She wants to
spond part of this money on school supplies. She wants to
heve et least $250 left in her checking account after buying
her school supplies.
rate
to le
The inequality shown can be used to find m, the amount of
money Shonte can spend on school supplies.
m + 250 $ 300.
Write and graph an inequality that represents all possible
values of m. Explain your reasoning.
Answers
Answer:
m less than or equal to 50
Step-by-step explanation:
300 minus 250 is the money that shonte is willing to spend, 50 dollars. Shonte can spend less than 50 because she wants At Least 250 dollars left. So M would be equal to or less than 50.
Eli broad this flower box for his garden 24 inches 6" 8 inches 18" 8 inches what is the volume in cubic inches of Eli‘s flower box
Answers
Answer:
Sorry, the dimensions you gave are indecipherable.
Step-by-step explanation:
What is the value ???????
Help!
Answers
Answer:
please give brainiest
thank you
Answer:
Its 16 (-1/2)^-4=16 then
can someone help me with part A please??
Answers
Answer:
h=4cm
Step-by-step explanation:
a) volume of a cuboid= LBH
cuboid a=(3x2x8)cm³
=48cm³
cuboidb
6cmx2cmxh=48cm³
12cm²xh=48cm³
12cm²h/12cm²=48cm³/12cm²
h=4cm
A sociologist conducts an experiment to see how watching a documentary on young men in gay relationships affects individual attitudes toward gay marriage. Both men and women are given a survey, but only those in the experimental group watch the video before answering the survey questions. Identify the dependent variables in this experiment.\
Answers
Answer:
those people in the experimental group who watch the video.
Step-by-step explanation:
A dependent variable is defined as a variable for which the value depends on the other factors. A change in the depended variable in an experiment changes the result of the experiment or the research.
In the context, a sociologist who conducts an experiment to see the affect on the relationship in the young men after watching a video. Here the dependent variable are the young men and women who are given the video to watch before they answer the question.
What are the domain and range of the function f(x)= x+5?
Answers
Answer:
top answer, domain and range have no restrictions
Step-by-step explanation:
I need help with this
Answers
Anyone know this answer for 8?
Answers
PLEASEEEEEEEEEEEEEE HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Answers
Answer:
rhombus
Step-by-step explanation:
PLZZZ HELP WORTH 100 POINTS
A pair of equations is shown below: y = 2x − 1 y = 4x − 5
Part A: In your own words, explain how you can solve the pair of equations graphically. Write the slope and y-intercept for each equation that you will plot on the graph to solve the equations.
Part B: What is the solution to the pair of equations?
Answers
Answer: its 7 lol i dont know
Step-by-step explanation:
value expression of 3^5 / 3^3
Answers
Answer:
9
Step-by-step explanation:
3^5 = 243
3^3 = 27
243 / 27 = 9
Hope this helps :)
Math question part 2 please help
Answers
Answer:
471 cm
Step-by-step explanation:
here diameter of the circle is 150cm, and we know radius is half of diameter.
therefore r = 150/2
= 75
Now,
according to formula,
Circumference of circle = 2πr
= 2 x 3.14 x 75
= 471 cm
Factor 56−16 using the GCF.
56−16=
Answers
Answer:
The GCF of 16 and 56 is 8. The answer is 8
Answer:
The GCF of 16 and 56 , the answer is 8.
Type in the value of y.
If x = 7, then y =
Answers
Explanation:
The rule says "whatever x is, add 1 to it to get y"
So for instance, if x = 3, then y = x+1 = 3+1 = 4
Now if x = 7, then y = x+1 = 7+1 = 8
Answer:
[tex]\huge\boxed{Answer\hookleftarrow}[/tex]
Given that,
[tex]1 + 1 = 2 \\ 2 + 1 = 3 \\ 3 + 1 = 4 \\ 4 + 1 = 5...[/tex]
So from this we can infer that, [tex]\large\bold{ x + 1 = y}[/tex]
Now,
[tex]x = 7 \\ y= \: ?[/tex]
Use the rule ⎆ [tex]\large\bold{ x + 1 = y}[/tex]
[tex]x + 1 = y \\ 7 + 1 = y \\ 8 = y[/tex]
✐ The value of y is 8.
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
# ꧁❣ RainbowSalt2²2² ࿐
URGENT PLEASE HELP ASAP WILL GIVE BRAINLIEST!!!!!!!!!!!
Answers
Slope is 0.75 or 3/4 I believe!
Which interval or union of intervals represents the values for which f(x) is ≤ 0? Select the correct choice below and fill in the answer boxes to complete your choice.
Answers
Answer:
(-∞, -1]∪{5}
Step-by-step explanation:
We know that:
f(x) ≤ 0 is true if the graph of the function is intersecting the x-axis or below the x-axis.
So we can just look at the graph, we can see that in the interval:
(-∞, -1] (the value x = -1 is included, that is why we use the symbol ] instead of the parenthesis)
the graph is below or intersecting the x-axis
and this also happens at x = 5 or just denoted as {5}
Then the correct notation is:
(-∞, -1]∪{5}
If 3x-5=4,find the value of x
Answers
Answer:
x=3
Step-by-step explanation:
3x-5=4
3x=4+5
3x=9
x=9/3
x=3
What is the radius of a circle with a diameter of 6 meters
Answers
radius = d/2
Hope this helps ;)
Answer:
the radius is 3 m
Step-by-step explanation:
the radius of a circle is always one half of the diameter.
Here the diameter is 6 m, so the radius is 3 m.
Help pls, I’m confused
Answers
Answer:
(x + y)² = 25
Step-by-step explanation:
The expansion of (x + y)² is
(x + y)² = x² + y² + 2xy ← substitute x² + y² = 15 and xy = 5
= 15 + 2(5)
= 15 + 10
= 25
Find the missing angle measurements of LJK ? , fill in the boxes
Answers
Answer:
Angle LJK = 75 degrees
Step-by-step explanation:
Here, we want to fill the boxes
From the diagram;
angle HJL and LJK are supplementary (they add up to 180 degrees)
Angle HJL + Angle LJK = 180
angle LJK = 180-105
Angle LJK = 75 degrees
find the vertex and the x-inter of the function given below. y = x^2 + 2x + 6
Answers
Answer: Vertex = (-1, 5) x-intercepts = No real solutions
Step-by-step explanation:
Vertex = -2/2= -1
-1^2 + 2(-1) +6
1 -2 +6
-1 +6
=5
Discrminats= 2^2 -4(1)(6)
4 -4(1)(6)
4-24
= -20 (It's a negative so there's no real solutions, meaning there's no xintercepts/R0XS)