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FinnZ [79.3K]
1 year ago
9

The time needed to travel a certain distance varies inversely with the rate of speed. If it takes 8 hours to travel a certain di

stance at 36 miles per hour, how long will it take to travel the same distance at 60 miles per hour?
———hours ?
Mathematics
2 answers:
notsponge [240]1 year ago
8 0

Answer:

4.8

Step-by-step explanation:

Speed = distance/time

36 = distance/8

Distance = 36×8

= 288

60 = 288/time

time = 288/60

= 4.8

katen-ka-za [31]1 year ago
5 0
I believe it would be 4.8 hours
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When dividing polynomials, your main goal is to be able to divide the dividend evenly into the <em>divisor</em>. For example, we divide x²+2x+1 by x+1. The first thing you're going to focus is, what term will completely divide the first term of the polynomial? That would be x. Why? Because when you multiply x with x+1, the product is x²+x. When you subtract this from the polynomial, the x² will cancel out. All you have to do is subtract x from 2x, yielding x. Then, you carry down the last term of the equation: +1. You do the steps again. The term that will completely divide x+1 by x+1 is 1. When you subtract the two, you will come up with zero. That means there is no remainder. The polynomial is divisible by the divisor. 
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5 0
1 year ago
A rectangular pool 18 meters by 12 meters is surrounded by a walkway of width x
vesna_86 [32]

Answer:

x=3 meters

Step-by-step explanation:

step 1

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A=LW

we have

L=18\ m\\W=12\ m

substitute

A=18(12)=216\ m^2

step 2

Find the area of rectangular pool including the area of the walkway

Let

x ----> the width of the walkway

we have

L=(18+2x)\ m\\W=(12+2x)\ m

substitute

A=(18+2x)(12+2x)

step 3

Find the area of the walkway

To find out the area of the walkway subtract the area of the pool from the area of rectangular pool including the area of the walkway

so

A=(18+2x)(12+2x)-216

step 4

Find the value of x if the area of the walkway equal the area of the pool

so

(18+2x)(12+2x)-216=216

Solve for x

(18+2x)(12+2x)=432\\216+36x+24x+4x^{2}=432\\4x^{2} +60x-216=0

Solve the quadratic equation by graphing

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see the attached figure

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2 years ago
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Answer:

Step-by-step explanation:

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Answer:

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