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Inga [223]
3 years ago
7

Subtract 7x^2+4x-9 from 5x^2+10x-5. Express the answer in descending degree order

Mathematics
2 answers:
nata0808 [166]3 years ago
4 0
Hi there!

To subtract this, we can only subtract like terms. That means we only subtract 7x^2 and 5x^2, 4x and 10x, and -9 and -5. It might make more sense after the work below:

7x^2 - 5x^2 = 2x^2
4x - 10x = -6x
-9 - -5 = -4

So, the answer is 2x^2 - 6x - 4

Hope this helps!
Ugo [173]3 years ago
4 0

Answer:

2x^2 - 6x - 4

Step-by-step explanation:

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Shameeka sold her hamsters to a pet store. This doubled the number of hamsters in the store. Then the store got six more hamster
nalin [4]

Answer: shameeka sold 20 hamsters to the store.

Step-by-step explanation:

Let x represent the number of hamsters that shameeka sold to the store.

Let y represent the number of hamsters that the pet store had initially.

Shameeka sold her hamsters to a pet store. This doubled the number of hamsters in the store. It means that

x + y = 2y

x = 2y - y

x = y

Then the store got six more hamsters. If the pet store has 46 hamsters now, it means that

2y + 6 = 46

2y = 46 - 6

2y = 40

y = 40/2

y = 20

Since x = y, then

x = 20

5 0
3 years ago
By convention, the independent variable is arrayed along the ____ in a scattergram. regression line calibration line vertical ax
babunello [35]

Answer:

Horizontal axis

Step-by-step explanation:

By convention, the independent variables is arrayed along the Horizontal axis (abscissa) in a scattergram.

The stcattergram has two dimensions

  • The X (independent) variable is arrayed along the horizontal axis.
  • The Y(dependent) variable is arrayed along the vertical axis.
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7 0
3 years ago
Can you guys help me <br> Thank you ☺
Jobisdone [24]
3/10 > 3/100

You turn 3/10 into 30/100 and 30 is greater than 3
8 0
3 years ago
Read 2 more answers
7. The height of a ball in meters is modeled
s344n2d4d5 [400]

Answer:

the ball is in the air for 8 seconds

Step-by-step explanation:

f(x) = y

when y = 0, the ball would've travelled through the air over the final time of flight.

0 = -5x^2 + 40x + 0

use quadratic equation to find the value of x

x = (-b ± √b^2 - 4 • a • c) / 2 • a

x = (-40 ± √40^2 - 4 • -5 • 0) / 2 • -5

x = (-40 ± √1600) / - 10

x = (-40 ± 40) / - 10

x = 0 or x = 8

7 0
3 years ago
PLEASE HELP!!!
ki77a [65]
Part A:
I have attached the graph of this system of inequalities.

Part B:
Plug in (8,10) into both equations

10 > 3(8) + 10
10 > 24 + 10
10 > 34

This is false!

10 < (-3/4)(8) - 1
10 < (-3)(2) - 1
10 < -6 - 1
10 < -7

This is also false!

So, (8,10) is not included in the solution area for the system.

3 0
3 years ago
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