$(x+a)^2=x^2+2\cdot x\cdot a+a^2\ \ \ \Rightarrow \ \ \ \ 2\cdot x\cdot a=14x\ \ \ \Leftrightarrow\ \ \ 2a=14\ /:2\\\\a=7\ \ \ \Rightarrow\ \ \ a^2=7^2=49\\\\\ \ \ \Rightarrow\ \ \ a\ perfect\ square\ trinomial=(x+7)^2$

6 0

3 years ago

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Find the length of the arc on a circle of radius 12 feet intercepted by a central angle of 150°.

stich3 [128]

Let A = arc length of circle

A = 2πr•(degree/360°)

A = 2π(12)(150°/360°)

A = 24π(150°/360°)

Calculate the right side to find A and you're done. Take it from here.

5 0

3 years ago

What is the correct placement of the value -3

sdas [7]

It is thousandths because it t is 3 plac s the the left

5 0

3 years ago