Rectangle QRST has vertices Q 3 1/2, 1, R 7 1/2, 1, S 7 1/2, −4 1/2, T 3 1/2, −4 1/2. What is the perimeter of rectangle QRST?

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

a rotation about point l

step-by-step explanation:

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