Please help!! I’m failing math and I have no idea what the answer is and if I don’t do my hw and keep failing I might have to repeat the grade! please let me know if you know the answer <3. I provided a photo! but I’ll but it here too question⬇️⬇️

which expression is equivalent to 5(4x + 3) - 3x

A) 18x + 15

B) 18x + 3

C) 7x + 8

D) 2x + 8

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height