Answer:
(-3,3)
Step-by-step explanation:
x² + y² = 18
y = x + 6
(Assuming you mean x and y to the power of 2. Use the ^ symbol to tell that is it an exponent like this: x^2)
First, substitute the y in the first equation
x² + (x + 6)² = 18
FOIL
x² + x² + 12x + 36 = 18
2x² + 12x + 36 = 18
Subtract 18 from both sides
2x² + 12x + 36 = 18
- 18 - 18
2x² + 12x + 18 = 0
Divide both sides by 2
(2x² + 12x + 18)/2 = 0/2
x² + 6x + 9 = 0
Factor
(x + 3)(x + 3) = 0
x has to be -3 for the equation to be 0, so the x = -3
Plug the new x into one of the original equations; we'll use the second one
y = -3 + 6
y = 3
Answer:83
Step-by-step explanation:d the mean you add /5= 76
There is no mode none repeat
The median put them in order get middle number. 40. 70. 83. 92. 93 is 83 best
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Answer:
Step-by-step explanation:


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Answer:
h(a + 2) = 4a + 3
Step-by-step explanation:
∵ h(x) = 4x - 5
∴ h(a + 2) = 4(a + 2) - 5
∴ h(a + 2) = 4a + 8 - 5 = 4a + 3