There is a number such that three times that this number minus 6 is equal to 45

Let "the number" = x

3x - 6 = 45 is your equation

Solve for x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

Isolate the x. First, add 6 to both sides

3x - 6 (+6) = 45 (+6)

3x = 51

Isolate the x. Divide 3 from both sides

3x/3 = 51/3

x = 51/3

x = 17

17 is your answer for "a number".

hope this helps

answer: jasmine will bake 4/3 or 1 1/3 cookies in an hour

step-by-step explanation:

if u add 1/3 every 15 minutes after an hour u will have 4/3 or 1 1/3

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form