Ask question

Ask question

All categories

3 years ago

14

at an elementary school 99 students are in 1st grade represent 33% of the students at the school, how many students are at the s

chool?

1 answer:

Kitty [74]3 years ago

7 0

Answer:

300 is the student strength of the school

Step-by-step explanation:

99 of total students=33%

total students=99*100/33

total student=9900/33

total student=300 students

You might be interested in

Write the expanded form of the expression. <br> -1/2 (y - x) = ?

morpeh [17]

Answer:

The expanded form of the expression $-\frac{1}{2}(y-x)$ is $\mathbf{-\frac{1}{2}(y)+\frac{1}{2}(x)}$

Step-by-step explanation:

We need to write expanded form of the expression $-\frac{1}{2}(y-x)$

For expansion we will use distributive property of multiplication over addition

$a(b+c)=ab+ac$

Applying above rule:

$-\frac{1}{2}(y-x)\\=-\frac{1}{2}(y)-(-\frac{1}{2}(x))\\=-\frac{1}{2}(y)+\frac{1}{2}(x)$

So, the expanded form of the expression $-\frac{1}{2}(y-x)$ is $\mathbf{-\frac{1}{2}(y)+\frac{1}{2}(x)}$

3 0

3 years ago

in 2009 a total of R36 000 was invested in two accounts. One account earned 7% annual interest and the other earned 9% .The tota

Akimi4 [234]

a = amount invested at 7%

b = amount invested at 9%

we know the amount invested was ₹36000, thus we know that whatever "a" and "b" are, a + b = 36000. We can also say that

$\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{7\% of a}}{\left( \cfrac{7}{100} \right)a}\implies 0.07a~\hfill \stackrel{\textit{9\% of b}}{\left( \cfrac{7}{100} \right)b}\implies 0.09b$

since we know the interest earned from the invested was ₹2920, then we say that 0.07a + 0.09b = 2920.

$\begin{cases} a + b = 36000\\\\ 0.07a+0.09b=2920 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{using the 1st equation}}{a + b = 36000\implies \underline{b = 36000-a}}~\hfill \stackrel{\textit{substituting on the 2nd equation}}{0.07a~~ + ~~0.09(\underline{36000-a})~~ = ~~2920} \\\\\\ 0.07a+3240-0.09a=2920\implies 3240-0.02a=2920\implies -0.02a=-320 \\\\\\ a=\cfrac{-320}{-0.02}\implies \boxed{a=16000}~\hfill \boxed{\stackrel{36000~~ - ~~16000}{20000=b}}$

5 0

2 years ago

Please help with 1-9 or as many as you can..

natulia [17]

Answer:

1. 336

2. 162

3. 130

4. 93.5

5. 108

6. x = 2

7. x = 2

8. x = 4

9. h = 10

Step-by-step explanation:

Hope this helped, sorry if any are wrong

4 0

3 years ago

If a vertical line passes through a graph only once the relation is considered to be a function. True or false?

kotykmax [81]

This is True -----------

6 0

3 years ago

Read 2 more answers

Problem-solving Practice

kotykmax [81]

First, what's 3 to the power of 8?
Then what's 3 to the power of 10

Now subtract them by each other for your answer

6 0

3 years ago

Read 2 more answers