robertobi5397
03.12.2020 •
Mathematics
Dillon pays x dollars to get a haircut. He gives the stylist a
25% tip. The expression representing his total cost is
x +0.25x
Which expression is equivalent and why?
A. 1.025x because adding 25% to the cost of the haircut is the same
as multiplying the cost by 1.025.
B. 1.25x because adding 25% to the cost of the haircut is the same
as multiplying the cost by 1.25.
C. 1.25x because adding $25 to the haircut is the same as
multiplying the cost by 1.25.
D. x(0.25) because the cost of the haircut can be factored out.
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Ответ:
x = 50
Step-by-step explanation:
The sum of the angles of a quadrilateral are 360
M + N + J + K = 260
x + x+15 + 2x+15 + 3x-20 = 360
Combine like terms
7x + 10 = 360
Subtract 10 from each side
7x+10-10 = 360-10
7x= 350
Divide each side by 7
7x/7 = 350/7
x = 50