Answer:
the answer is -30 feet
Step-by-step explanation:
that is the answer because -42 is -12 feet lower than -30 feet. plsss give me brainliest plsss
D= # of dimes
q= # of quarters
QUANTITY EQUATION:
d + q= 64
COST EQUATION:
0.10d + 0.25q= $9.25
STEP 1:
multiply quantity equation by -0.10 to be able to eliminate the d term in step 2
(-0.10)(d + q)= (-0.10)(64)
-0.10d - 0.10q= -6.40
STEP 2:
add equation from step 1 to cost equation to eliminate the d term and solve for q
Add
0.10d + 0.25q= $9.25
-0.10d - 0.10q= -6.40
0.15q= 2.85
divide both sides by 0.15
q= 19 quarters
STEP 3:
substitute q value in step 2 into either original equation to find d value
d + q= 64
d + 19= 64
subtract 19 from both sides
d= 45 dimes
CHECK:
0.10d + 0.25q= $9.25
0.10(45) + 0.25(19)= 9.25
4.50 + 4.75= 9.25
9.25= 9.25
ANSWER: There are 45 dimes and 19 quarters.
Hope this helps! :)
Answer:
75 in²
Step-by-step explanation:
From the diagram, you can see that the shape is made up of a square and 4 triangles. (We know it's a square as the width = length).
First, find the area of the square.
Area of a square = width x length = 5 x 5 = 25 in²
All the triangles are the same, so we need to find the area of one of the triangle and multiply it by 4.
Area of a triangle =
x base x height =
x 5 x 5 = 12.5 in²
So total area of 4 of these triangles = 4 x 12.5 = 50 in²
Therefore the total surface area = 25 + 50 = 75 in²
Answer:
369.42
Step-by-step explanation:
A=a+b
2h=31+25.4
2·13.1≈369.42
Answer:
B
Step-by-step explanation:
![x^2-8x+16= \\\\(x-4)(x-4)=\\\\(x-4)^2](https://tex.z-dn.net/?f=x%5E2-8x%2B16%3D%20%5C%5C%5C%5C%28x-4%29%28x-4%29%3D%5C%5C%5C%5C%28x-4%29%5E2)
You can confirm this by working in reverse:
![(x-4)^2= \\\\(x-4)(x-4)=\\\\x^2-4x-4x+16=\\\\x^2-8x+16](https://tex.z-dn.net/?f=%28x-4%29%5E2%3D%20%5C%5C%5C%5C%28x-4%29%28x-4%29%3D%5C%5C%5C%5Cx%5E2-4x-4x%2B16%3D%5C%5C%5C%5Cx%5E2-8x%2B16)
Hope this helps!