2 years ago

Solve for a 8 + 4a = 3a

Mathematics

1 answer:

Vilka [71]2 years ago

5 0

Answer:-8

Step-by-step explanation:

8+4a=3a

8=3a-4a

8=-a

a=-8

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Write the equation of a line with a slope of 4 and a y-intercept of −3.

olga_2 [115]

Answer:

D. y = 4x − 3

Step-by-step explanation:

Just took the test and got 100%

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2 years ago

Y=x y=0 x=2 x=4 about x=1

Reil [10]

Yes this is correct.

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3 years ago

A man is 6 feet 3 inches tall. The tip of his shadow touches a fire hydrant that is 13 feet 6 inches away. What is the angle of

Natalija [7]

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1 year ago

Hi there,<br> I need help to solve the perimeter and the surface area of this shape.<br> Thanks!

leonid [27]

Answer: Perimeter = 6π ≈ 18.84

Area = 15π ≈ 47.10

<u>Step-by-step explanation:</u>

This is a composite of a big semicircle with diameter of 10 --> radius (r) = 5

plus a medium semicircle with diameter of 6 --> r = 3

minus a small semicircle with diameter of 4 --> r = 2

Perimeter of a semicircle = $\dfrac{1}{2}(2\pi r)=\pi r$

$P_{big}=\pi (5)\quad =5\pi\\P_{medium}=\pi (3)\quad =3\pi\\P_{small}=\pi (2)\quad =2\pi\\P_{composite} =5\pi+3\pi -2\pi\\.\qquad \qquad =\large\boxed{6\pi}$

Area of a semicircle = $\dfrac{1}{2}(\pi r^2)$

$A_{big}=\dfrac{1}{2}\pi (5)^2\quad =12.5\pi\\\\A_{medium}=\dfrac{1}{2}\pi (3)^2\quad =4.5\pi\\\\A_{small}=\dfrac{1}{2}\pi (2)^2\quad =2\pi\\\\A_{composite} =12.5\pi+4.5\pi -2\pi\\\\.\qquad \qquad =\large\boxed{15\pi}$

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3 years ago

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wariber [46]

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2 years ago