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KATRIN_1 [288]
3 years ago
8

Add 3x2-4x+5, 9x - 10+2x2 and 7-5x2

Mathematics
2 answers:
mote1985 [20]3 years ago
6 0

Answer:

5x+2

Step-by-step explanation:

(3x2-4x+5)+(2x2+9x-10)+(-5x2+7)

Combine like-terms

The x-squared gets cancelled out

And you are left with 5x +2

Eva8 [605]3 years ago
4 0
I thinks this is the solution for this question. I tried doing it with explanations for you :) hope it helps

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Find the perimeter<br> Please answer<br> HS geometry
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Step-by-step explanation:

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2 years ago
Suppose a five minute overseas call costs $5.91 and a 10 minute call costs $10.86. What is the equation and how long can you tal
Solnce55 [7]

Answer:

Step-by-step explanation:

let x represent the number of minutes of call made.

Let y represent the cost for x minutes of call.

If we plot y on the vertical axis and x on the horizontal axis, a straight line would be formed. The slope of the straight line would be

Slope, m = (10.86 - 5.91)/(10 - 5)

m = 4.95/5 = 0.99

The equation of the straight line can be represented in the slope-intercept form, y = mx + c

Where

c = intercept

m = slope

To determine the intercept, we would substitute x = 10, y = 10.86 and m = 0.99 into y = mx + c. It becomes

10.86 = 0.99 × 10 + c = 9.9 + c

c = 10.86 - 9.9

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The linear function becomes

y = 0.99x + 0.96

Therefore, for $12, the number of minutes would be

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8 0
3 years ago
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