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4 years ago

10

I'LL GIVE U BRAINLY IF U ANSWER CORRECTLY Willie runs 5 miles in 20 minutes. If Willie runs at the same rate, how many miles can

he run in 28 minutes?

2 answers:

Greeley [361]4 years ago

7 0

Willie will run seven miles in 28 minutes. I think I’m right!(:

elena55 [62]4 years ago

6 0

Answer:

Willie will run 7 miles in 28 minutes.

Step-by-step explanation:

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Next-door neighbors Bob and Jim use hoses from both houses to fill Bob's swimming pool. They know that it takes 12 h using both

Leokris [45]

Answer:

Jim's hose: 27 hours.

Bob's hose: 21.6 hours.

Step-by-step explanation:

Let t represent hours taken by Jim's hose.

Part of pool filled by Jim's hose in 1 hour would be $\frac{1}{t}$ .

We have been given that Bob's hose, used alone, takes 20% less time than Jim's hose alone. This means that Bob's hose take will take 80% time of Jim's hose that is $0.8t$ .

Part of pool filled by Bob's hose in 1 hour would be $\frac{1}{0.8t}$ .

We are also told that it takes 12 hours using both hoses. Part of pool filled by both hoses in 1 hour would be $\frac{1}{12}$ .

Now, we will add rates of both hoses and equate with $\frac{1}{12}$ as:

$\frac{1}{t}+\frac{1}{0.8t}=\frac{1}{12}$

$\frac{0.8}{0.8t}+\frac{1}{0.8t}=\frac{1}{12}$

$\frac{0.8+1}{0.8t}=\frac{1}{12}$

$\frac{1.8}{0.8t}=\frac{1}{12}$

Cross multiply:

$0.8t*1=1.8(12)$

$0.8t=21.6$

$\frac{0.8t}{0.8}=\frac{21.6}{0.8}$

$t=27$

Therefore, it will take 27 hours for Jim's hose to fill the pool alone.

Time take by Jim's hose alone: $0.8t\Rightarrow 0.8(27)=21.6$ .

Therefore, it will take 21.6 hours for Bob's hose to fill the pool alone.

3 0

4 years ago

Need help with these types of questions

sasho [114]

Answer:

i think it should be B...

6 0

3 years ago

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Choosy Chocolates sold chewy squares and chocolate stars at a ratio of 3 to 8. 45 more chocolate stars were sold than chewy squa

masya89 [10]

So 45 more chocolate stars were sold compared to chewy squares, which makes it a ratio of 3:8, hence we can assume that (45÷5=9) is the amount sold for each ratio.

If you multiply 9 by (3+8=11), you will get 99.

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4 years ago

Use the graph of the function shown below to find

dimaraw [331]

Answer:

Answer Undefined for both of them

Step-by-step explanation:

The graph doesn't plot the y value for 2.5 or -1.5, so you have to choose answer undefined in the first box for both of them.

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3 years ago

Find g(1) if g(x) =x^2+1<br>A.4<br>B.2<br>C.3

kodGreya [7K]

Answer:

B.2

Step-by-step explanation:

g(1) if g(x) =x^2+1

= x^2 + 1 = (1)^2 + 1 = 1 + 1 = 2

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3 years ago

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