Whoever answers correctly gets brainliest, I need help ASAP don't send answers after 30 mins, the picture is attached

AB = 21

Step-by-step explanation:

BC and DE are sides of a regular pentagon, so their lengths are equal.

5x - 4 = 2x + 11

3x = 15

x = 5

All sides are congruent, so AB = BC = 5x - 4

AB = BC = 5x - 4

AB = 5(5) - 4

AB = 25 - 4

AB = 21

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: