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qaws [65]
2 years ago
6

Please help me solve this!!!!!!

Mathematics
2 answers:
stepladder [879]2 years ago
6 0

ANSWER: The value of k is C. 9

EXPLANATION: what the other person said

BabaBlast [244]2 years ago
4 0

Answer:

C. 9

Step-by-step explanation:

y = -4x^2 + 2kx

subtitute 3:

y = -4(9)^2 + 2k(9)

y = -4(81) + 18k

let y = 0

=> 0 = -324 + 18k

=> k = 324/18 = 9

this is my calculations hope it helps

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Answer:

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Step-by-step explanation:

1) Convert 7 and 1/2 to improper fraction. Use this rule: a b/c = ac + b/c

7x +  \frac{1}{2}  + 7x -  \frac{7 \times 2 + 1}{2}

2) Simplify 7 × 2 to 14 .

7x +  \frac{1}{2}  + 7x  -  \frac{14 + 1}{2}

3) Simplify 14 + 1 to 15.

7x +  \frac{1}{2}  + 7x -  \frac{15}{2}

4) Collect like terms.

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Therefor, the answer is 7( 2x - 1 ).

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