Solve system of equation y=x^2+3x+1,y=-x-3

x = -2

y = -1

Step-by-step explanation:

y = x² + 3x + 1       y = -x -3

Set the equations equal to each other:

x² + 3x + 1 = -x - 3

Move all terms to one side:

x² + 3x + x + 1 + 3 = 0

x² + 4x  + 4 = 0

factor:

(x + 2)² = 0

take square root of both sidesL

x + 2 = 0

subtract 2 from both sides:

x = -2

Plug -2 in for x in either of the equations:

(-1)²+3(-1)+1 = y

y = -1

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

8y^50

step-by-step explanation: