Answer:
x = 4
Step-by-step explanation:
Vertical angles are equal.
m∠1 = m∠2
10x - 9 = 4x + 15
Add 9 to both sides
10x = 4x + 15 + 9
10x = 4x + 24
Subtract 4x from both sides
10x -4x = 24
6x = 24
Divide both sides by 6
x = 24/6
10% is $8.00 so 20% is $16 and 80-16= 64 so the sale cost is $64.00
Answer: 5.5 quarts = 22 cups
1 cup = 4 cups
to convert cups to quart, just multiply by 4
5.5 x 4 = 22
t=100
p=3000
t 1/2 = 20
Try inserting the numbers in the half-life formula.