20 POINTS I NEED YOU GENIUSES AT LEAST COME AND LOOK EASY I JUST STRUGGLE 6. Libbi is creating a triangular mural for her city. The space she needs to fill has a base of 8 feet and a height of 9 feet. Which formula can she use to find the total amount of paint she will need if the entire space is painted?
A) A=(8)(9)
B) A=2(8+9)
C) A= (8)(9)/2
D) A=2 (8/9)

8. Which properties should you use to solve the equation 4x+2=18 ?
A) The inverse property of addition and then the associative property of multiplication
B) The inverse property of addition and then the multiplicative identity
C) The inverse property of addition and then the inverse property of multiplication
D) The inverse property of addition and then the commutative property of multiplication

1. C

2. C

Step-by-step explanation:

1. Since triangles are half of squares, they need to be divided by 2 to actually be a triangle, so c would be correct

2. when solving equations like this you want to use the inverse property of addition to cancel out the whole number, then to get rid of the x you need to use the inverse property of multiplication.

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

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)