Which equation shows the quadratic formula used correctly to solve 7x2 = 9 + x for x?
-1+
((719)
2(7)
x-1
ox=--
(-1)-47)(9)
2(7)
-1 +
(-1)2 +4(7)(9)
2(7)
(-1)2 +4(7(9)
207)
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The answer in the procedure

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form is equal to

in this problem we have

 ----->  

so

substitute in the formula

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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your answer is -9

step-by-step explanation: