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Vera_Pavlovna [14]
3 years ago
8

Help me with my test

Mathematics
2 answers:
zavuch27 [327]3 years ago
5 0

Answer:

B. -8

Step-by-step explanation:

first find k: plug 3 and -2 into the function

3=2(-2)^2-5(-2)+k\\3=2(4)+10+k\\3=18+k\\k=-15

then plug -1 into 2x^2-5x-15

2(-1)^2-5(-1)-15\\= 2(1)+5-15\\=7-15\\=-8

h(-1) = -8

geniusboy [140]3 years ago
4 0

- 8.

Step-by-step explanation:

h(x) = 2 {x}^{2}  - 5x + k

If h(-2) = 3.

Then, h(-1) =

h( - 1) = 2 {( - 1)}^{2}  - 5( - 1) + k

h( - 1) = 2 + 5 + k

h( - 1) = 7 + k

- 1 - 7 = k

- 8 = k

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