A
mici
substitution.
The value of x in this system of equations is 1.
3x + y = 9
y = -4x + 10
1. Substitute the value of y in the first equation:
2. Combine like terms:
3. Apply the subtraction property of equality:
4. Apply the division property of equality
3x + (-4x + 10) = 9
--X + 10 = 9
x = -1
x =
1
What is the value of y?
y =

all but the second one

step-by-step explanation:

cuz that one goes over 180

mark brainliest

the f

last graph i believe

step-by-step explanation:

worked it out i believe

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a