Angie made an error because she used substitution incorrectly in step 3.
<h3>System of equation </h3>
7x + y =−12
7x + 4y = −6
subtract equation(i) from (ii) to eliminate x
Therefore,
3y = 6
y = 6 / 3
y = 2
Therefore,
7x + 2 = -12
subtract 2 from both sides of the equation
7x = -12 - 2
7x = - 14
x = - 14 / 7
x = -2
(-2, 2)
Therefore, Angie use substitution incorrectly in step 3.
learn more on system of equation here: brainly.com/question/1818941
A perfect square is when a trinomial can be factored into a binomial multiplied by itself right? If that's the case then I think b=8
x^2-8x+16
x^2-2×x×4+4^2
(x-4)^2
Hm. one that would come to mind is the fact that a professor is applying for a job at a highschool when they have no teaching expireince. hope this helps
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Y = x² - 11x + 24
0 = x² - 11x + 24
x = <u>-(-11) +/- √((-11) - 4(1)(24))</u>
2(1)
x = <u>11 +/- √(121 - 96)</u>
2
x = <u>11 +/- √(25)
</u> 2
x = <u>11 +/- 5</u>
2
x = <u>11 + 5</u> x = <u>11 - 5</u>
2 2
x = <u>16</u> x = <u>6</u>
2 2
x = 8 x = 3
The x - intercept of the equation is equal to {8, 3}.
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