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jekas [21]
2 years ago
8

15 points I need help plz ASAP

Mathematics
1 answer:
Yuri [45]2 years ago
3 0

Answer:

See explanation

Step-by-step explanation:

<u>Linear:</u>

1. During the spring, the grass in Gianna's yard grew \frac{1}{2} inch per week.

Equation: y=\frac{1}{2}x, where x is the number of spring weeks, y inches is the height of the grass after x weeks.

2. Rita babysits. She worked 2 hours and earned $24. She worked 3 hours and earned $36.

Equation: y=12x, where x is the number of hours, y is the amount Rita earned in x hours.

<u>Exponential:</u>

1. The population of the town was 25,000 in 1980. Then the population increased by \frac{1}{2}\% per year.

Equation: y=25,000\cdot (1+0.005)^x, where x is the number of years, y is the population after x years passed since 1980.

2. A car was worth $18,500 when it was new. Then the value decreased 18% per year.

Equation: y=18,500\cdot (1-0.18)^x, where x is the number of years, y is the car price after x years passed.

<u>Neither linear nor exponential:</u>

Albert went on a hike. After 1 hour, he had hiked 4 miles; after 2 hours he had hiked 7 miles; after 3 hours he had hiked 11 miles.

The differences 7 - 4 = 3, 11 - 7 = 4 are different, so the function is not linear. Also it is not exponential, becayse each next number of miles is not multiplied the previous number of miles by some number.

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F(x) and g(x) were inverse functions, then if f(a) = b, then g(b) = a

f(x) = (5x+1) / x g(x) = x / (5x+1)

f(1) = 6, but g(6) = 6/31 ≠ 1

So, f(x) and g(x) are NOT inverse functions.
5 0
2 years ago
If you reflect triangle MOV across the x-axis, what is the coordinate of O in the image?
Zina [86]

Hi,

The answer you are looking for is 2. (-4,2)

Have a great day & remember to mark brainliest if I helped :)

4 0
3 years ago
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Please help! I need the surface area for both. Absurd answer are not tolerated. Thanks if you help!
Natasha_Volkova [10]

Answer:

<h3>Figure 1</h3>
  • Perimeter of base = 5 + 5 + 8 = 18 ft
  • Height = 7 ft
  • Base area = 1/2(8)(3) = 12 ft²

<u>Surface area:</u>

  • S = 18*7 + 2*12 = 150 ft²
<h3>Figure 2</h3>

<u>Surface area of cube:</u>

  • S = 6a² = 6(2.5)² = 37.5 m²

<u>Surface area of prism:</u>

  • S = 2(11 + 9)(7) = 280 m²

<u>Overlapping area:</u>

  • S = 2.5² = 6.25 m²

<u>Surface area of composite figure:</u>

  • S = 280 + 37.5 - 2(6.25) = 305 m²
4 0
3 years ago
What is the simplified expression for
Anni [7]

Answer:

<h2>a) - a² + 5ab + 8</h2>

Step-by-step explanation:

3a^2+9ab+5-4a^2-4ab+3\qquad\text{combine like terms}\\\\=(3a^2-4a^2)+(9ab-4ab)+(5+3)\\\\=-a^2+5ab+8

4 0
3 years ago
Help!!!
WITCHER [35]

Answer: A. . Reflect triangle ABC across the x-axis, followed by a translation

5 units left.

Step-by-step explanation:

4 0
2 years ago
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