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zubka84 [21]
3 years ago
13

Equations is the inverse of y = x^2-5?

Mathematics
1 answer:
Fynjy0 [20]3 years ago
6 0

Answer:

Step-by-step explanation:

1.  Interchange x and y.  We get:  x = y^2 - 5

2. Solve for y:  y^2 = x + 5, so that y = ±√(x + 5)

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Solve for y.<br> 8y-3y=40
Airida [17]

Answer:

8

Step-by-step explanation:

8y-3y=40

5y. = 40

y. =8

the value of y is 8.

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4. The length of a rectangle is sixteen inches less
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Answer:

68in

Step-by-step explanation:

l = 3w-16

l-3w = -16

l+w = 96

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w = 28 in

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25 points? pls idk the answer :((( help D:
DedPeter [7]

Answer:

18x = 7.2

x =.4

Step-by-step explanation:

Let x = the weight of one box

We have 18 boxes that weigh 7.2 lbs

18x = 7.2

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18x/18 = 7.2/18

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PLEASE ANSWER + BRAINLIEST !!
PtichkaEL [24]

Answer:

Shouldn't the answer be A

Step-by-step explanation:

Because you are only increasing the rate interest and not the result itself.

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3 years ago
I need help seeing what I did wrong
Makovka662 [10]

Answer:  The two roots are x = 3/2 and x = -2

=========================================================

Explanation:

You have the right idea so far. But the two numbers should be 3 and -4 since

  • 3*(-4) = -12
  • 3+(-4) = -1

The -1 being the coefficient of the x term.

This means you need to change the -3x and 4x to 3x and -4x respectively. The other inner boxes are correct.

---------

Refer to the diagram below to see one way to fill out the box method, and that helps determine the factorization.

If we place a 2x to the left of -2x^2, then we need an -x up top because 2x*(-x) = -2x^2

Then based on that outer 2x, we need a -2 up top over the -4x. That way we get 2x*(-2) = -4x

So we have the factor -x-2 along the top

The last thing missing is the -3 to the left of 3x. Note how -3*(-x) = 3x in the left corner and -3*(-2) = 6 in the lower right corner.

We have the factor 2x-3 along the left side.

---------

The two factors are (2x-3) and (-x-2) which leads to the factorization (x+3)(-x+2)

The last thing to do is set each factor equal to 0 and solve for x

  • 2x-3 = 0 solves to x = 3/2 = 1.5
  • -x-2 = 0 solves to x = -2

The two roots are x = 3/2 and x = -2

8 0
3 years ago
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