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myrzilka [38]
2 years ago
15

Find the sum. 2x x2 - 6x + 9 + x2 + 2x - 15

Mathematics
1 answer:
galina1969 [7]2 years ago
5 0

Answer:

\large\boxed{x^2-6x+9+x^2+2x-15=2x^2-4x-6}

Step-by-step explanation:

x^2-6x+9+x^2+2x-15\qquad\text{combine like terms}\\\\=(x^2+x^2)+(-6x+2x)+(9-15)\\\\=2x^2-4x-6

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He uses 2/3 of a gallon each hour he works.
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2 years ago
Each unit on the map represents 5 miles. If you drive 20% of the way from Landview to Seaside, how many miles have you driven, a
dimulka [17.4K]
We use the distance formula for this problem.

d = √[(x₂ - x₁)² + (y₂ - y₁)²]

The distance between point (-2,-2) and point (-2,4).
d = √[(⁻2 - ⁻2)² + (4 - ⁻2)²] = 6 units

Then, compute for 20% of 6 units:
Distance traveled = 6(0.2) = 1.2 units

Use 1.2 units as distance and the starting point (-2,-2). The x-coordinate should still be at -2 because the distance is a straight line as shown in the picture.
1.2 = √[(-2 - ⁻2)² + (y - ⁻2)²]
Solving for y,
y = -0.8

The point is found at (-2,-0.8). This is located at quadrant 3. As to the distance traveled, that would be: 1.2*6 = 6 miles. Thus, the answer is C.

5 0
2 years ago
Read 2 more answers
7.
aivan3 [116]

Answer:

non-linear:  C, E, F

Step-by-step explanation:

Choices A, B, D are linear functions, so the rest are non-linear:  C, E, F

6 0
2 years ago
Plz help I’ll mark you
timurjin [86]

Answer:

A 1/2

Step-by-step explanation:

Ratio of short length to hypotenuse

= cos60

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4 0
3 years ago
After sales tax, an $81 cell phone costs $84.24. What is the sales tax percentage?​
Igoryamba

Answer:

4% sales tax

Step-by-step explanation:

Take the original costs and subtract it from the price after sales tax.

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Divide 3.24 by 81

this gives you .04, now either multiply by 100 or move the decimal two places to the right to convert the decimal to a percentage.

4 0
2 years ago
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