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3 years ago

If 30% of the students in your class like basketball, how many students are in your class if 6 students like

Mathematics

2 answers:

givi [52]3 years ago

5 0

There are 20 students in the class but only 6 like basketball because 30% of 20 is 6

7nadin3 [17]3 years ago

3 0

You need 20 students in the class

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Ruben bought 6 new books for his collection. This increased his collection by 12%. How many books did he have before his purchas

Norma-Jean [14]

Answer: The required number of books that Ruben had before purchases is 50.

Step-by-step explanation: Given that Ruben bought 6 new books for his collection that increased his collection by 12%.

We are to find the number of books that Ruben had before purchases.

Let x denotes the number of books that Ruben had before purchases.

Then, according to the given information, we have

$x+6=x+12\%\times x\\\\\\\Rightarrow 6=\dfrac{12}{100}x\\\\\\\Rightarrow 6=\dfrac{3x}{25}\\\\\\\Rightarrow 3x=150\\\\\Rightarrow x=\dfrac{150}{3}\\\\\Rightarrow x=50.$

Thus, the required number of books that Ruben had before purchases is 50.

4 0

3 years ago

What is the slope of the line joining (8,8) and (12, 6)?

Anna71 [15]

Answer:

$\huge \boxed{ \boxed{ - \frac{1}{2} }}$

Step-by-step explanation:

The slope of a line given two points can be found by using the formula

$m = \frac{ y_2 - y _ 1}{x_ 2 - x_ 1} \\$

From the question we have

$m = \frac{6 - 8}{12 - 8} = - \frac{2}{4} = - \frac{1}{2} \\$

We have the final answer as

$- \frac{1}{2} \\$

Hope this helps you

6 0

2 years ago

Sam deposits $1,000 into an account that pays 6% simple interest annually. He plans to take the money out after 3.5 years. What

lara31 [8.8K]

Well, the formula for simple interest is

$I=prt$

"I" is interest, "p" is the principal, "r" is the rate, and "t" is the time.

If you substitute the numbers, you get

$I=1,000(0.06)(3.5)$

When you multiply them together, you get

$I=210$

So, the simple interest for 3.5 years is $210.

But, in order to get the total balance, you have to add the interest and the principal together.

$B=1000+210 \\ B=1210$

So, the balance after 3.5 years is $1,210.

5 0

2 years ago

Read 2 more answers

The sum of two numbers is 56. One number is 2 more than the other. What is the smaller number?

grin007 [14]

Answer:

Step-by-step explanation:

27 plus 29 is 56

6 0

2 years ago

Find the function. f(-7) if f(x) = 8x+15<br>f(-7) = <br>-4?<br>7<br>0

docker41 [41]

Answer:

-41.

Step-by-step explanation:

Replace the x by -7:

f(-7) = 8(-7) + 15

= -56 + 15

= -41.

7 0

2 years ago