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3 years ago

What is 17/20 - 4/15

Mathematics

1 answer:

Zinaida [17]3 years ago

4 0

Hello there, today you gave us the problem $\frac{17}{20}-\frac{4}{15}$ ,

Our first step is to give them common denominators, which is $\frac{51}{60}-\frac{16}{60}$ , solve it and we get $\frac{35}{60}$ as our answer, which can be simplified down to $\frac{7}{12}$

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3 years ago

Johanna can jog 3,000 feet in 5 minutes. If she can job at the same rate how many feet can she jog in 8 minitues

Liono4ka [1.6K]

She jogs 3000 feet in 5 minutes, divide 3000 by 5 to find out how many feet she can jog in 1 minute:

3000 / 5 = 600 feet in 1 minute.

Now multiply 600 feet by 8 minutes:

600 x 8 = 4,800 total feet.

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3 years ago

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A 30 foot ladder needs to reach 18 feet high against a building. What would the approximate angle of elevation be from the groun

yaroslaw [1]

Answer: The angle of elevation would be 36.87 degrees (approximately)

Step-by-step explanation: Please refer to the attached diagram for details

The 30-foot ladder reaches a point in the building which is point A. The height at which the ladder touches the building is 18 feet (that is, the height of the building, line AC. The angle of elevation from the ground is at angle B, the angle which the ladder forms with the ground.

So we have a right angled triangle ABC, with two sides and a reference angle B. To find angle B, we shall apply the trigonometric ratio;

SinB = opposite/hypotenuse

SinB = 18/30

SinB = 0.6

By use of a calculator or table of values

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3 years ago

I need help with 3,4,5<br> Please!!

gladu [14]

3. g(x) = x^2 - 5x + 3
g(-3) = -3^2 - 5(-3) + 3
g(-3) = 9 + 15 + 3
g(-3) = 27 <==

4. 4(7b + 15f - 8f) =
4(7b + 7f) =
28b + 28f <===

5. C = 2.50r + 15
for 5 rolls...r = 5
C = 2.50(5) + 15
C = 12.50 + 15
C = 27.50...its A

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3 years ago

consider the functions show. Explain the graph of a function its inverse are reflections over the line y = x

anastassius [24]

Answer:The ordered pairs (a,b) of a function are (b,a) for the inverse function.

Step-by-step explanation:

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3 years ago

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