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jekas [21]
3 years ago
8

15 points I need help plz ASAP

Mathematics
1 answer:
Yuri [45]3 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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Explain how you would find the total value of two $1 bills and 3 quarters
jeka57 [31]
2 $1 bills would equal $2 because they are $1 bills 1+1=2. Three quarters would equal .75 cents because a quarter equals .25 cents
5 0
3 years ago
Helppppp plzzzzzzz!!!!!! 15+PTS and brainliest!!!!!!!! ASAP!!!!!
RideAnS [48]

Answer: The 3rd one! Letter C.

Step-by-step explanation:

I used a calculator!

8 0
3 years ago
Read 2 more answers
Jia is skipping a rock across a pond. The sequence {4.2, 3.57, 3.0345, 2.5793, …} describes the height of the rock on each succe
mylen [45]

Answer:

u_n=4.2(0.85)^{n-1}

Step-by-step explanation:

u_1=4.2\\u_2=3.57\\u_3=3.0345\\u_4=2.5793

Geometric formula sequence:   u_n=ar^{(n-1)}

(where a is the first term of the sequence and r is the common ratio)

To find the common ratio, divide one of the terms by the previous term:

r=\frac{u_2}{u_1} =\frac{3.57}{4.2} =0.85

From inspection, a=4.2

Therefore, u_n=4.2(0.85)^{n-1}

8 0
2 years ago
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anzhelika [568]

Answer:

ANS: 1 - D

ANS: 2 - B

ANS: 3 - A

ANS: 4 - D

Step-by-step explanation:

8 0
2 years ago
Which expression is equivalent to (4x^3y^5)(3x^5y)^2 ?
barxatty [35]

(3x^5y)^2=

3^2=9

(x^5)^2=x^10

y^2=y^2

(3x^5y)^2=9x^10y^2

9x^10y^2(4x^3y^5)=

9*4=36

x^10*x^3=x^13

y^2*y^5=y^7

9x^19y^2(4x^3y^5)= 36x^13y^7

Final answer: 36x^13y^7

3 0
3 years ago
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