Help 7th grade math first can you give me the answers to these problems?

1. Forty-five of the 80 students walk to school. What is the ratio of students who walk to school to students who do not walk to school?



2. A merchant bought a stereo at wholesale for $90.00 and marked up the price 75% to sell the stereo at retail.

a. What was the retail price, and the sales-tax rate is 6%, what is the total price including sales tax.



3. Fraction Decimal Percent

2 1/3 a. b.

c. d. 3 1/3%



4. What number is 250 percent of 60?



5. John measured the diameter of his bicycle tire and found that it was 24 inches. What is the distance around the tire to the nearest inch?(Use 3.14 for 蟺)



6. The ratio of the measures of two angles was 4 to 5. If the sum of their measures was 180藲, what was the measure of the smaller angle?



7. w - 0.15 = 4.9



8.(2*3)2power - 2(3 2power)



9.

a. (-8)(-6)(-5)

______________

(-4)(-3)(-2)



b. -6 - 5(-4) - 3(-2)(-1)





Please help me if you can.Help 7th grade math first can you give me the answers to these problems?
haha. someone's a little to lazy to do their math homework now arent they? :P

(it's okay, im a 7th grader too. I have copied my friend's math homework before.)

BY THE WAY: i didnt get some answers, and forgive me if some are wrong.



1. 9/16 : 7/16



2. $166.95



3. ?



4. 150



5. 75 inches



6. ?



7. w = 5.05



8. ?



9. a. ?

b. ?Help 7th grade math first can you give me the answers to these problems?
45:80