3 years ago

Eric put two angles together to form a straight angle. One angle is 115

Mathematics

1 answer:

Anastaziya [24]3 years ago

4 0

The other angle is 65 degrees

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The first three steps in determining the solution set of the system of equations algebraically are shown.

Ivenika [448]

(2,-1), (-4,17).

Step-by-step explanation:

Equate the equation A and equation B

Convert the quadratic equation in factored form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

Complete the square. Remember to balance the equation by adding the same constants to each side.

Rewrite as perfect squares

Square root both sides

Find the values of y

Substitute the value of x in the equation B

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2 years ago

The number of cubic units in the volume of a sphere is equal to the number of square units in the surface area of the sphere. Wh

viktelen [127]

Answer:

Radius of sphere is 3 units.

Step-by-step explanation:

Volume of sphere is given by $4/3 \pi r^3$

surface area of sphere is given by $4 \pi r^2$

where r is the radius of the sphere.

Given that

The number of cubic units in the volume of a sphere is equal to the number of square units in the surface area of the sphere.

we equate formula of Volume of sphere and surface area of sphere

assuming r as the radius.

thus,

$4/3 \pi r^3 = 4 \pi r^2\\\\4/3 \pi r^3/ 4 \pi r^2 = 1\\=>r/3 = 1\\=> r = 3$

Thus, radius of sphere is 3 units.

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2 years ago

Han and Andre were comparing the miles they ran during one week of cross country practice Hantan 12 which was three times as muc

serious [3.7K]

Answer:

I don't know.

Step-by-step explanation:

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2 years ago

Maria makes $16 per hour. She gets a 18% raise. What is her new hourly<br> rate?

Mariana [72]

Answer:

$18.88 per hour.

Step-by-step explanation:

We first need to find 18% of $16.

16 * 0.18 = 2.88

The pay rate increases by $2.88.

$16 + $2.88 = $18.88

Hope this helps.

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1 year ago

On a drawing of a model airplane, the scale used is 1 in.:3 ft. How many feet would 4.5 inches represent?

AnnyKZ [126]

Answer:

A. 13.5ft

Step-by-step explanation:

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3 years ago