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Sladkaya [172]
4 years ago
9

4 7 of students at a school are boys. If there are 2723 students at the school, how many are girls? 5 9 of students at a school

are girls. If there are 2367 students at the school, how many are boys?
Mathematics
1 answer:
Free_Kalibri [48]4 years ago
5 0

Answer:

1167 of them are girls in the first situation.

1052 of them are boys in the second situation.

Step-by-step explanation:

Since there are 2723 students at the school and 4/7 of them are boys, the number of boys:

→ 2723 x \frac{4}{7} = 1556

The number of the girls = Total number of students - The number of boys

→ 2723 - 1556 = 1167

Since there are 2367 students at the school and 5/9 of them are girls, the number of girls

→ 2367 x \frac{5}{9} = 1315

The number of the boys = Total number of students - The number of girls

→ 2367 - 1315 = 1052

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Rufina [12.5K]

Answer:

\frac{\Delta y}{\Delta x}  =\frac{f(x_2)-f(x_1)}{x_2-x_1} =\frac{6-(-12)}{3-(-3)} =\frac{18}{6}= 3

Step-by-step explanation:

To find the average rate of change of a function over a given interval, basically you need to find the slope. The mathematical definition of the slope is very similar to the one we use every day. In mathematics, the slope is the relationship between the vertical and horizontal changes between two points on a surface or a line. In this sense, the slope can be found using the following expression:

Average\hspace{3}rate\hspace{3}of\hspace{3}change=Slope=\frac{y_2-y_1}{x_2-x_1}  =\frac{f(x_2)-f(x_1)}{x_2-x_1}

So, the average rate of change of:

f(x)=-x^2+3x+6

Over the interval -3

Is:

f(x_2)=f(3)=-(3)^2+3(3)+6=-9+9+6=6\\\\f(x_1)=f(-3)=-(-3)^2+3(-3)+6=-9-9+6=-12

\frac{\Delta y}{\Delta x}  =\frac{f(x_2)-f(x_1)}{x_2-x_1} =\frac{6-(-12)}{3-(-3)} =\frac{18}{6}= 3

Therefore, the average rate of change of this function over that interval is 3.

3 0
3 years ago
How do you solve y=2x-2
Fantom [35]

y=2x-2

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nexus9112 [7]

Answer:

Step-by-step explanation:

p = peaches, m = mangos

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m = p + 6

1.75p + 1.50(p + 6) = 22

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p = 4 <====== she bought 4 peaches

m = p + 6

m = 4 + 6

m = 10 <===== she bought 10 mangos

check...

1.75p + 1.50m = 22

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I need an estimate. My teacher needs an explanation.​
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Step-by-step explanation:

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