Consider the system of equations. 3x − y = 5,

2x + 3y = −15

1. Which value can the first equation be multiplied by to form opposite values on the y-term?
A.-3
b.-2
c.3
d.4
The solution to the system of equations is _
A.-5,0
B. 5,0
C.0,-5
D.0,5
.

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)

answer: 12   they all have at least 28 days

step-by-step explanation: haha