3 years ago

Please answer this question!! 20 points and brainliest!

Mathematics

1 answer:

gogolik [260]3 years ago

4 0

Answer:

Step-by-step explanation:

I've seen it before.

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The sum of two numbers is 20, and the difference is 40

Feliz [49]

$x+y=20\\\underline{x-y=40}\\2x=60\\x=30\\\\30+y=20\\y=-10$

<u>-10 and 30</u>

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3 years ago

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I am a rectangle, and my area is 80 square inches. My width is 2 inches shorter than my length. What is my perimeter?

pshichka [43]

Area=l*b=l*(l-2)=80(given)

so, l^2 - 2l =80
l^2 - 2l - 80=0
l=10 or -8

l=10,b=10-2=8
perimeter=2(l+b)=2(18)=36

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What is the slope of the equation: x = -2

Harrizon [31]

Answer:

undefined

Step-by-step explanation

it is a vertical line and has no defined slope

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3 years ago

Use the law of cosines to find the length of side C.

sergij07 [2.7K]

Answer:

$\text{D. 36.64}$

Step-by-step explanation:

The Law of Sines is given by $\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}$ and works for any triangle.

Therefore, we have the proportion:

$\frac{c}{\sin 41.5^{\circ}}=\frac{37}{\sin 42^{\circ}},\\\\c=\frac{37\sin 41.5^{\circ}}{\sin 42^{\circ}}=36.6399945706\approx \boxed{36.64}$

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3 years ago

In the triangle below,

Fynjy0 [20]

Step-by-step explanation:

4x -20 + 3x +12 = 90

7x -8 = 90

7x = 98

x = 14

Angle F: 4(14) -20 = 36

Angle E: 3(14)+12= 54

Angle G : 90

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3 years ago