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3 years ago

9

Help me please this is too hard for me

1 answer:

fgiga [73]3 years ago

7 0

Answer:

look at the picture i sent please

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Write a proportion that could be used to solve for each variable. Then solve.

Sati [7]

<span>16 walls in 40 hours
3 walls in h hours

16/40 = 3/h

16h = 40(3)
16h = 120
h=120/16
h=7.5

answer: </span><span>3 walls in 7.5 hours</span>

5 0

3 years ago

The perimeter of rectangle ABCD is 256 inches. Its length is 3 times as long as its width. Find the area of triangle ABC.

Oliga [24]

Answer:

$\large\boxed{A_\triangle==1,536\ in^2}$

Step-by-step explanation:

The formula of a perimeter of a rectangle:

$P=2(l+w)$

The formula of an area of a rectangle:

$A=lw$

l - lenght

w - width

We have l = 3w and the perimeter P = 256 in. Substitute:

$2(3w+w)=256$ <em>divide both sides by 2</em>

$4w=128$ <em>divide both sides by 4</em>

$w=32\ in\to l=3(32)=96\ in$

Calculate the area of a rectangle:

$A=(96)(32)=3,072\ in^2$

The triangle ABC is the half of the rectangle. Therefore the area of a triangle ABC is:

$A_\triangle=\dfrac{3,072}{2}=1,536\ in^2$

5 0

3 years ago

What is -3(-6+8)^3-2(1-3)^3

marin [14]

Assignment: $\bold{Solve \ Equation: \ -3\left(-6+8\right)^3-2\left(1-3\right)^3}$

<><><><><>

Answer: $\boxed{\bold{-8}}$

<><><><><>

Explanation: $\downarrow\downarrow\downarrow$

<><><><><>

[ Step One ] Follow PEMDAS Order Of Operations; Calculate Within Parenthesis

Note: $\bold{PEMDAS: \ Parenthesis, \ Exponents, \ Multiply, \ Divide, \ Add, \ Subtract}$

$\bold{-6+8: \ 2}$

[ Step Two ] Rewrite Equation

$\bold{-3\cdot \:2^3-2\left(1-3\right)^3}$

[ Step Three ] Calculate Within Parenthesis

$\bold{1-3: \ -2}$

[ Step Four ] Rewrite Equation

$\bold{-3\cdot \:2^3-2\left(-2\right)^3}$

[ Step Five ] Calculate Exponents

$\bold{2^3: \ 8}$

[ Step Six ] Rewrite Equation

$\bold{-3\cdot \:8-2\left(-8\right)}$

[ Step Seven ] Multiply

$\bold{2\left(-8\right): \ -16}$

[ Step Eight ] Rewrite Equation

$\bold{-24-\left(-16\right)}$

[ Step Nine ] Subtract

$\bold{-24-\left(-16\right): \ -8}$

[ Step Ten ] Rewrite Equation

$\bold{-8}$

<><><><><><><>

$\bold{\rightarrow Mordancy \leftarrow}$

8 0

3 years ago

What is x2-12x+36 factored

svetoff [14.1K]

How to get answer by Mimiwhatsup:

$x^2-12x+36\\Break\:the\:expression\:into\:groups\\=\left(x^2-6x\right)+\left(-6x+36\right)\\\mathrm{Factor\:out\:}x\mathrm{\:from\:}x^2-6x\mathrm{:\quad }x\left(x-6\right)\\\mathrm{Factor\:out\:}-6\mathrm{\:from\:}-6x+36\mathrm{:\quad }-6\left(x-6\right)\\=x\left(x-6\right)-6\left(x-6\right)\\\mathrm{Factor\:out\:common\:term\:}\left(x-6\right)\\=\left(x-6\right)\left(x-6\right)\\Refine\\Answer: \left(x-6\right)^2$

7 0

4 years ago

The area is ___ square units

12345 [234]

Answer: 358 square units

Steps:
(12 * 20) + (10 * 10) + (6 * 3)
240 + 100 + 18
358

5 0

3 years ago