7th grade math

Circles

100

The radius is 15. What is the diameter.

The diameter is 30

200

The diameter is 38. What is the radius.

The radius is 19

300

The diameter is 42. What is the circumference 

The circumference is 131.88

400

The circumference is 285.74 whats the diameter

The diameter is 91

500

the radius is 5 what is the area.

The area is 78.5

adding integers

100

2+-1

1

200

8+-14

-6

300

-18+(-13)

-31

400

18+-71

-53

500

-193+(-184)

-377

subtracting integers

100

1 - ^-1

2

200

-4-^-9

5

300

10-^-5

15

400

-9 - 5

-14

500

18-^-85

103

finding the cop

100

Find the C.O.P. X=5 Y=10

C.O.P=2

200

X=5 Y=25

C.O.P.=5

300

X=81 Y=9

C.O.P.=8

400

X=18 Y=90

C.O.P=5

500

X=131 Y=65.5

C.O.P.=2

%

100

I was buying something for $100 dollars it has a 1% tax what is the new price

$101

200

50% of 120

60

300

i am going to buy something for $50 but i have a 20% coupon. Whats the new price?

$40

400

Find the original price for a $34.56 with a 8% tax rate.

$32

500

A $44 bike had a tax rate that made it $47.08. What is the tax rate

7%