Evaluate the expression for s=4 and t=8
2 answers:
2st^2-s^2
s=4
t=8
2(4)(8)^2-(4)^2
pemdas
exponents
8^2=64
4^2=16
now we have
2(4)(64)-16
multiply
2(4)=8
8(64)=512
now we have
512-16
subtract
496
Whats the expression so you can plug those numbers in.
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Circumference = 2 x 15 x 3.14
Circumference = 30 x 3.14
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Diagonals of a rectangle are congruent.
18x - 28 = x + 380
Solving for x, I get 17.
So, x = 17.
PR = 18x - 28
PR = 18(17) - 28
PR = 278
QS = x + 380
QS = 17 + 380
QS = 397
