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Reptile [31]
3 years ago
8

there are 750 students in class 7 and 625 students in class 8 what percent is class 7 of the class 8?

Mathematics
1 answer:
Leno4ka [110]3 years ago
6 0
750 is ?% of 625

<em>Y = ?% * X</em>

Solving our equation for ?
?% = Y/X
?% = 750/625
? = 1.2

Convert decimal to percent:
<span>?% = 1.2 * 100 = 120%
</span>
Class 8 is 120% of Class 7.

If you want the percent of Class 8 to Class 7, it is:
 625 is ?% of 750

<em> = ?% * X</em>

Solving the equation for ?
?% = Y/X
?% = 625/750
? = 0.8333

Convert decimal to percent:
<span>?% = 0.8333 * 100 = 83.33%

</span>Class 7 is 83.33% of Class 8.

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Using n for the variable, write an algebraic expression that represents a number that is divisible by the given number. (Hint: A
PtichkaEL [24]

Answer:

a) 5n\\b) 10n\\c) 3n

Step-by-step explanation:

Let 'n' be any integer i.e. a number from the set {....., -3,-2,-1,0,1,2,3, ..... }

so 'n' can be termed as the variable here.

A number 'q' that can be divided by a a given number 'p' can be written as:

n \times p

When divided by 'p' :

\dfrac{q}{p} = \dfrac{n \times p}{p}\\\Rightarrow \dfrac{q}{p} = n

So, The number 'q' is completely divisible by 'p' leaving 'n' as the quotient.

Using this concept, let us solve the questions:

a) Using 'n' as the variable, a number that is divisible by 5 can be written as:

5n

b) Using 'n' as the variable, a number that is divisible by 10 can be written as:

10n

c) Using 'n' as the variable, a number that is divisible by 3 can be written as:

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7 0
3 years ago
Find the intercepts and graph the equation. 7x +5y=12
vazorg [7]

Answer:

y-intercept: (0, 12/5) or (0, 2.4)

x-intercept: (12/7, 0) or (1.714, 0)

Step-by-step explanation:

The y-intercept is the point where the graph crosses the y-axis. That means, the point (0, yi). To find yi, we have to substitute x by 0 in the equation.

7x + 5y=12

7*0 + 5y = 12

y = 12/5 = 2.4

y-intercept: (0, 12/5) or (0, 2.4)

The x-intercept is the point where the graph crosses the x-axis. That means, the point (xi, 0). To find xi, we have to substitute y by 0 in the equation.

7x + 5y=12

7x + 5*0 = 12

x = 12/7 = 1.714

x-intercept: (12/7, 0) or (1.714, 0)

Finally, the graph is shown below.

3 0
1 year ago
What does 41 = w - 4
zimovet [89]
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3 years ago
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Elis [28]

Step-by-step explanation:

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3 years ago
The pythagorean theorem and maps answer key
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I can help u with one question,rest u can do it.
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