Answer:
Step-by-step explanation:
<u>Given</u>
<u>Solving</u>
- To find f(3), substitute x = 3 in the function
- ⇒ f(3) = -2(3)² + (3) + 5
- ⇒ f(3) = -2(9) + 8
- ⇒ f(3) = -18 + 8
- ⇒ <u>f(3) = -10</u>
Answer:
x = 9; y = 1
Step-by-step explanation:
Answer:
x = 1, y = 10
Step-by-step explanation:
y = -5x + 15 --- Equation 1
2x + y = 12 --- Equation 2
Substitute y = -5x + 15 into Equation 2:
2x + y = 12
2x - 5x + 15 = 12
Evaluate like terms.
15 - 3x = 12
Isolate -3x.
-3x = 12 - 15
Evaluate like terms.
-3x = -3
Find x.
x = -3 ÷ -3
x = 1
Substitute x = 1 into Equation 2:
2x + y = 12
2(1) + y = 12
2 + y = 12
Isolate y.
y = 12 - 2
y = 10
U should do like this... But sry I don't know third part
