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AB2 + BC2 = AC(AD + DC)
Reason: Distributive Property
125
AB2+ BC2 = AC AD + AC DC
Reason: addition
13
AB2 = AC * AD
Reason: cross multiplication
14
AB2 + BC2 = AC AC
Reason: segment addition
15
AB2+ BC2 = ACP
Reason: multiplication

Is this right?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?