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3 years ago

How do you substitute

Mathematics

1 answer:

Elina [12.6K]3 years ago

4 0

Answer:

Solving for one variable and using that solution to find the other variable.

Step-by-step explanation:

So if i said y=3x-2 with another equation like 12y+4= -16

you would plug in y to the second equation making it 12(3x-2)+4=-16 then you would solve for x. I hope this helps

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Y=-x^2+8x-8 in vertex form

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Answer:

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4 years ago

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What is the area of this figure

wolverine [178]

Answer:

$\large\boxed{A=54}$

Step-by-step explanation:

Look at the picture.

We have two triangles and the trapezoid.

The formula of an area of a triangle:

$A_{triangle}=\dfrac{bh}{2}$

b - base

h - height

The formula of an area of a trapezoid:

$A_{trapezoid}=\dfrac{b_1+b_2}{2}\cdot h$

b₁, b₂ - bases

h - height

Triangle 1:

b = 3, h = 2

$A_1=\dfrac{(3)(2)}{2}=3$

Triangle 2:

b = 6, h = 1

$A_2=\dfrac{(6)(1)}{2}=3$

Trapezoid:

b₁ = 7, b₂ = 9, h = 6

$A_3=\dfrac{7+9}{2}\cdot6=\dfrac{16}{2}\cdot6=(8)(6)=48$

The area of the figure:

$A=A_1+A_2+A_3\\\\A=3+3+48=54$

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4 years ago

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