I dont get these both questions can i please get help with them

1)Examine parallelogram ABCD.
∠A=8x+2 and ∠B=9x+8

What is the value of x?
Do not include the degree symbol.

2)Examine parallelogram ABCD.
Segments CE¯¯¯¯¯¯¯¯ and BE¯¯¯¯¯¯¯¯ have lengths 15−x and 2x, respectively
What is the value of x?
Enter the correct value.

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%