Im having trouble on some of these pls help 1. 72% of days is 18 days
2.If the sales tax in a town is 5% and Amanda pays $10 in tax on her purchase what was the cost of the item?
3.If 7 out of 25 students have a pet, what percent of the class has a pet?

7.3

step-by-step explanation:

answer:   x*94 +688*6   = 267*100

94x+4128=26700    

94x=22572     /94

x=240.128

step-by-step explanation: mark as brainlest reallly need it thx

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.

there were only 2 presidents that were under the age of 45. theodore roosevelt, and jfk, that makes 5%