8.
the ordered pairs (2, –21) and (5, –45) are solutions to which of the following equations?
(1 point)
• y = –8x – 5
• y = –8x + 5
• y = 8x – 5
• y = 8x+ 5

Check the coordinates of the given points in each of the given possible answer functions (2, –21) and (5, –45), until you find the function satisfied by these two points.

Do these points satisfy the equation y = –8x – 5? Substitute 2 for x and -21 for y and determine whether or not the resulting equation is true:

-21 = -(2) - 5 This is false, and we can state that confidentally even

without checking whether the other given point is a solution.

Moving on to the next equation y = –8x + 5:

Is -21 = -8(2) + 5? Is -21 = -16 + 5? Is -21 = -11? No. Move on to the next equation: y = 8x – 5. Is -21 = 8(2) -5 true? No. Move on to the next equation:

y = 8x+ 5 Is -21 = 8(2) + 5? No.

It appears that the given points (2,-21) and (-5,-45) are not solutions of any of the four given equations.

what statement? is there an image?

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet