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Vera_Pavlovna [14]
2 years ago
8

Help me with my test

Mathematics
2 answers:
zavuch27 [327]2 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]2 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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Try and answer these multiple questions again and I will try to give you brainiest. Good Luck!
IrinaK [193]

Answer: 9: c  , 10: a ,11 :d  12: a

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
He currently pays an AP$ of $1.87 per pound for fresh onions, but his yield is 50% after peeling and cooking the onions. What is
PolarNik [594]

Complete question :

Chef Charming and his mother sell cheese steak sandwiches at their food truck. They use fresh onions, and cook them slowly to caramelize them before putting them on their sandwiches.

Charming found a pre-cooked onion that was $8.3 per pound AP$, with 100% Yield. He wants to save money but isn't sure if that is a better deal than cooking the fresh onions himself.

He currently pays an AP$ of $1.87 per pound for fresh onions, but his yield is 50% after peeling and cooking the onions. What is the EP$ for the fresh onions, after caramelizing?

Answer:

$3.74

Step-by-step explanation:

Cost of fresh onions = $1.87 per pound

Percentage yield = 100% after caramelizing

Therefore EP$ for the fresh onions after caramelizing will be :

(1 + percentage yield) * cost of fresh onions

(1 + 100%) * $1.87

(1 + 1) * $1.87

2 * $1.87

= $3.74

3 0
2 years ago
Find the x intercepts of f(x) = –16x^2 + 22x + 3
Helga [31]
That is where the line crosses the x axis or where y=0

0=-16x^2+22x+3
we gon do grouping
ac method
-16 times 3=-48

what 2 numbers multiply to get -48 and add to get 22
-2 and 24
0=-16x^2-2x+24x+3
group
0=(-16x^2-2x)+(24x+3)
undistribute
0=-2x(8x+1)+3(8x+1)
undistribute
0=(8x+1)(-2x+3)
set eaqual to 0

8x+1=0
8x=-1
x=-1/8

-2x+3=0
3=2x
3/2=x

x intercepts ate x=-1/8 and x=3/2
4 0
3 years ago
Please help with this asap!! :)
Llana [10]

Answer:

x = 11

Step-by-step explanation:

Given :

AB = x + 5

BC = 2(x - 3)

AB = BC

AB = BC

x + 5 = 2(x - 3)

x + 5 = 2x - 6

5 + 6 = 2x - x

     11 = x

     x = 11

happy to help :)

3 0
3 years ago
Explain how the commutative property of addition,the Associative property of addition and mental math can help you find 75.2+(57
4vir4ik [10]

Answer: The sum of 75.2+(57.376+24.8) is 157.376.

Explanation:

The commutative property of addition states that,

a+b=b+a

The associative property of addition states that,

a+(b+c)=(a+b)+a

The given expression is 75.2+(57.376+24.8).

First use commutative property of addition in the parenthesis.

75.2+(57.376+24.8)=75.2+(24.8+57.376)

Now use associative property of addition.

75.2+(24.8+57.376)=(75.2+24.8)+57.376

Now simplify the expression,

(75.2+24.8)+57.376=100+57.376

(75.2+24.8)+57.376=157.376

Therefore, the sum of 75.2+(57.376+24.8) is 157.376.

7 0
2 years ago
Read 2 more answers
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