PLEASE HELP, NEED RN! (worth 50 points, you MUST answer all three questions!!)

The Answer for #1 is found as follows:

Perimeter is the sum of all sides so...

8x+2+5x-4+9x+3=?

Group together the x's and the numbers:

8x+5x+9x+2-4+3=?

Answer = 22x+1

The Answer for #2 is found as follows:

Area of a triangle is 1/2 base times height

The bottom of the triangle is 4t, but we know t is 4 inches, so the bottom is 16.

The height is 7 times t which is 4... so the height is 28 inches.

using the formula, it will be 1/2(16)(28). The answer will be 224 inches squared.

The Answer for #2 is found as follows:

Polynomials cannot have squares or fractions. So the 2nd, 3rd, and 4th options are all not polynomials.

0.5 meters per second

step-by-step explanation:

the average speed between 2 seconds and 8 seconds is 0.5 meters per second.

hope this ! mark brainliest!

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.