(10 points and brainliest)
kathy spent $15.60 at the post office. she paid $11.40 to send a package to her aunt and bought stamps with the rest of the money. if kathy bought 10 stamps, which equation can be used to find x, the cost of each stamp.

a.15.60 = 11.40 + 10x
b.15.60 = 11.40 + (10 – x)
c.15.60 = 10(11.40 + x)
d.15.60 = 11.40x + 10

A.) 15.60=11.40+10x

Step-by-step explanation:

okay we know kathy spent 15.60 in total at the post office

so we know 15.60 will be after the equal sign.

she paid 11.40 only on the package

and rest of money was on stamps.

15.60-11.40= 4.20

so she used 4 dollars and 20 cents for stamps if she bought 10 we need to divied 4.20/10=0.42

0.42 cents for each stamps so we need a equation that will give us this answer.

Me i go thru each one and solve for x

lucky for me i just need to solve one

because equation A solves it correctly.

15.60=11.40+10x

subtract 11.40 on both sides

15.60-11.40

4.20=10x

now we divide 10 on each side

4.20/10=0.42

x=0.42

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.