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3 years ago

13

Hey Siri found that 78% of students do their homework before 8:00 PM predict how many students out of 975 do their homework befo

re 8:00 PM

1 answer:

cestrela7 [59]3 years ago

4 0

Multiply 975 by .78 and you will get 760.50.

You might be interested in

You are paid $78 for 61/2 hours of work. What is your rate of pay?

Igoryamba

78÷ 6 1/2 =
78 ÷ 13/2 =
78 × 2/13 =
156/13 = 12

12 dollars per hour

4 0

3 years ago

<img src="https://tex.z-dn.net/?f=r%20-%207%20%3D%207%20What%20ir%20r" id="TexFormula1" title="r - 7 = 7 What ir r" alt="r - 7 =

Art [367]

R-7=7 add the seven from both sides, leaving the r alone, because this is what you are trying to find. Thus the answer is r=14.

8 0

4 years ago

Is 2/5 bigger than 4/9

Vilka [71]

One way to look at this is that 2/5 = 4/10, but depending on how well you understand fractions, you might not be able to compare 4/10 and 4/9.

To make it easier to see, we can find a common denominator:
2/5 = 18/45
4/9 = 20/45

No, 2/5 is not bigger than 4/9

8 0

3 years ago

Searches related to Searches related to A motorboat travels 135 kilometers in 3 hours going upstream. It travels 183 kilometers

svetlana [45]

Answer:

$\large \boxed{\sf \text{The rate of the boat is } 53 \ km/h \text{, the rate of the current is }8\ km/h \ \ }$

Step-by-step explanation:

Hello, let's note v the rate of the boat and r the rate of the current. We can write the following

$\dfrac{135}{v-r}=3=\dfrac{183}{v+r}$

It means that

$135(v+r)=183(v-r)\\\\135 v + 135r=183v-183r\\\\\text{ *** We regroup the terms in v on the right and the ones in r to the left***}\\\\(135+183)r=(183-135)v\\\\318r=48v\\\\\text{ *** We divide by 48 both sides ***}\\\\\boxed{v = \dfrac{318}{48} \cdot r= \dfrac{159}{24} \cdot r}$

But we can as well use the second equation:

$3(v+r)=183\\\\v+r=\dfrac{183}{3}=61\\\\\dfrac{159}{24}r+r=61\\\\\dfrac{159+24}{24}r=61\\\\\boxed{r = \dfrac{61*24}{183}=8}$

and then

$\boxed{v=\dfrac{159*8}{24}=53}$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0

3 years ago

Find two pairs of integers whose sum is -6

Norma-Jean [14]

There are many pairs of integers (whole numbers) that equal -6.

1 + 5
2 + 4
3 + 3
-3 + 9

You can choose from any of those pairs.

6 0

4 years ago