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Pachacha [2.7K]
3 years ago
7

Evaluate -7x^2 -5 + y^2- forx = -2, y=4

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
4 0

Answer:

The (y^2 ) or (y^–2) It is not clear, I solved it in both ways (y^2) and (y^-2) .^_^

- 7 {x }^{2}  - 5 +  {y}^{2}  \\  - 7( { - 2}^{2} ) - 5 +  {4}^{2}  \\  - 7( - 4) - 5 + 16 \\    28 - 5 + 16 \\  =  39

_______o_____o_______

- 7 {x }^{2}  - 5 +  {y}^{ - 2}  \\  - 7( { - 2}^{2} ) - 5 +  {4}^{ - 2}  \\  - 7( - 4) - 5 +  \frac{1}{16}  \\    28 - 5 +  \frac{1}{16}  \\  =  23.06

I hope I helped you^_^

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Answer:

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3 years ago
I need help please answer these two questions for me! Will give points.​
jarptica [38.1K]

Answer:

7.) 7

10.)  0

Step-by-step explanation:

When it means "evaluate the function", it's in essence asking us to see what the function spits out when we feed it a certain input. Our inputs are our x values, which spit out a y value.

Evaluating the function when x = 1:

Let's look at where the function has an x value of 1. We see it near the bottom of the table and see the y value associated with the input is 7. So when the function is fed 1 as an input, it spits out 7.

Evaluating the function when f(x) = - 2:

This one is a weird because of the new notation. Just think of it as some value of f, which we don't know (so we represent it as an x-variable) must equal -2. So let's look at our table to find out where our output is -2. We find that when f(x) = -2 the input is 0. So the input which gives -2 is 0.

7 0
3 years ago
The price of 6 pretzels is $5.10. Simon and Sofia bought 8 pretzels and shared the cost equally. How much did each person pay?
yuradex [85]
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4 0
4 years ago
You and your best friend Josh, each want to purchase a video gaming system the costs $200 you have $100 and save five dollars ea
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Answer: For you : 100+5x=200

For Josh : 50+10x=200

Step-by-step explanation:

Given : Cost of video game.= $200

Money you have = $100

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Let x be the number of week, the money( in $) you have after x weeks = 100+5x

Josh has $50 in save $10 each week , then money( in $) Josh has after x weeks = 50+10x

Required equations :

For you : 100+5x=200

For Josh : 50+10x=200

3 0
3 years ago
I WILL MARK AS BRAINLIEST
earnstyle [38]

Answer:

B

Step-by-step explanation:

B

5 0
4 years ago
Read 2 more answers
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