Given the following equation x2 + 4x = 21 find the solutions. (Show All Work) 15a) Set the equation equal to 0 by inverse operations.

15b) Place the equation in factored form.

15c) Set each factor equal to 0 and solve for x.

I need help asap will give brainlist if answered and work is showed!

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

What function has a range {yly< 5}? question on picture above^

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z