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3 years ago

13

What is the area, in square centimeters, of the figure below?

1 answer:

san4es73 [151]3 years ago

4 0

Answer: 39.52 cm

Step-by-step explanation: If you multiply 5.2 and 7.6 you would get 39.52 cm.

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Find the angle of elevation from the point on the ground 90 feet from the base of a building that is 200 feet tall

DanielleElmas [232]

$Look\ at\ the\ picture.\\\\tg\alpha=\frac{200}{90}\\\\tg\alpha=\frac{20}{9}\\\\tg\alpha=2.222...\\\\\alpha\approx66^o$

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3 years ago

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Im not sure how to do this 5×(−2w−4)

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Answer:

-10w-20

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Distribute inside parenthesis,

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2 years ago

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Solve for h in 9=h-5

Misha Larkins [42]

Answer:

h = 14

Step-by-step explanation:

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3 years ago

Problem<br> 3x + 5 + 2x = 12 + 4x

Ratling [72]

X=7 All you need to do is combine like terms and then move the appropriate terms to the appropriate side.

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3 years ago

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What is the solution to 3x -2y =1 and 4y = 7 + 3x

Delvig [45]

Given.

$3x-2y=1$ (1)

$4y=7+3x$ (2)

Re-arrange equation (2)

$(4y=7+3x)-4y$

$0=-4y+3x+7$

$(0=-4y+3x+7)-7$

$-7=-4y+3x$

Multiply equation (2) by -1

$-1(3x-4y=-7)$

$-3x+4y=7$ (3)

Combine like terms and solve.

$3x-3x-2y+4y=1+7$

$2y=8$

Divide by (2y) and solve for (y).

$\frac{2y}{2}=\frac{8}{2}$

$y=4$

Substitute (y) for equation (1).

$3x-2y=1$

$3x-2(4)=1$

$3x-8=1$

Add (8) to both sides.

$(3x-8)+8=(1)+8$

$3x=9$

Divide by (3).

$\frac{3x}{3}=\frac{9}{3}$

$x=3$

Check your work.

$3x-2y=1$

$3(3)-2(4)=1$

$9-8=1$

$1=1$

$4y=7+3x$

$4(4)=7+3(3)$

$16=7+9$

$16=16$

Your answers is $x=3$ and $y=4$

8 0

3 years ago