3(3x+7)=3x+51
help me please

5

Step-by-step explanation:

3(3x+7) = 3x+51

9x + 21 =3x+51 ; cuz 3 times 3 is 9 and 3 times 7 is 21

subtract 21 so 21 - 21 = 0 and 51 - 21 = 30 so

9x= 3x+30

Then subtract 3!  9-3x and 30 - 3x

You will get 6x = 30

Next you will divide by 6x

Lastly you will get 5! So your answer is 5, sorry it's a little messy but I hope this helps!

answer is 8x+24

area of vanessa's patio = length × width

given, length = (3x² + 5x + 10)

width = (x² - 3x - 1)

area of vanessa's patio = (3x² + 5x + 10)(x² - 3x - 1)

= 3x²(x² - 3x - 1) + 5x(x² - 3x - 1) + 10(x² - 3x - 1)

= 3x⁴ - 9x³ - 3x² + 5x³ - 15x² - 5x + 10x² - 30x - 10

= 3x⁴ - 4x³ - 8x² - 35x - 10

hence, expression of vanessa's patio = (3x⁴ - 4x³ - 8x² - 35x - 10)