Question

Please help!!! thank you so much in advance

Answer 1

3.

Three different interpretations of an 8% sales tax?  Odd question.

8%, 8 percent, literally means "8 per 100".  For each $100 item you purchase you pay an additional $8 in tax.

8% = 0.08, the factor applied to the price to determine the tax.

8%=8/100, you pay 8 cents in tax for every 100 cents in sales

4.

Just because the ratio is 5:7 doesn't mean the total is 5+7=12.  Non zero factors don't change a ratio, e.g. 5:7=50:70.  

5.

b/g=5/7

The fraction of boys is b/(b+g) which if you've done these a few times you can immediately write down as 5/12.  Let's solve it like its our first time,

$g = \frac 7 5 b$

$\dfrac{b}{b+g} = \dfrac{b}{b + \frac 7 5 b} = \dfrac{1}{1 + \frac 7 5} = \dfrac{1}{\frac{12}{5}} = \dfrac{5}{12}$

Similarly the fraction of girls is 7/12.

Answer 2

Answer:

#3:  you can write 8% as

8/100

0.08

0.8/10

#4:  both statemenets are correct! there are 12 total students! not sure the problem.

#5:  as you know from the last question there are 12 total children in the class, if the ratio of BOYS TO GIRLS is 5 to 7 that means that:

5/12 students in the class are boys

7/12 students in the class are girls

Step-by-step explanation: