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4 years ago

One number is 10 times as large as another, and their difference is 81. Find the numbers.

Mathematics

1 answer:

Mashcka [7]4 years ago

6 0

Answer:

10x

Step-by-step explanation:

smaller number is 9 and larger number is 90. The difference is 81.

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Jill is standing at the base of her apartment building. She measures the angle of elevation to the top of a nearby tower to be 4

Helga [31]

Answer:

1) From the measure of 40°, you can write:

tan(40°) = 100/x, where x is the base from the building to the tower

⇒x=100/tan(40°) = 119,18 m

2) From the measure of 30°, you can write

tan(30°) = y / 119,18, where y is the height from the roof of Jill's building to the top of the tower.

Then, y = tan(30°) * 119,18 = 68,81 m

3) The height of Jill's building is 100 - 68,81 = 31,19 m

7 0

4 years ago

12430000 in expanded form

Tresset [83]

10,000,000 + 2,000,000 + 400,000 + 30,000

4 0

3 years ago

What is the surface area of the cylinder?

LenaWriter [7]

Answer:

D. 578pi

Step-by-step explanation:

Sorry if that's wrong

7 0

3 years ago

Please help me with this

MissTica

Answer:

For the question on the right, I assume b is the exponential factor, or growth factor.

Step-by-step explanation:

Linear:

$Y=aX + b\\(X, Y) = (0, 15) => b = 15\\(X,Y) = (1, 12) => a = -3\\Y = -3X + 15$

You can find the equation by using two points and the equation for a line.

Exponential:

$Y = a^{bX+c}\\(X, Y) = (0, 81) => a^{c} = 81 => a^{c} = 3^{4} => a=3, c=4\\(X, Y) = (1, 27) => a^{b+c} = 27 => a^{b}a^{c} = 27 => a^{b} = \frac{27}{81} = \frac{1}{3} => b=-1\\Y = 3^{-X+4}$

6 0

3 years ago

Simplify (7ty)(3t)<br> (answer fast please)

attashe74 [19]

21t^2y is the answer!

4 0

3 years ago