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Yuki888 [10]
3 years ago
9

Janet’s car insurance payment decreases by $20 each year. Which expressions represent the total change in her payment,in dollars

, after 5 years A. 20-20-20-20-20 B. 100 c. 5•(-20) d. -20•(-5) E. -100 pls answer my
Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
4 0

Answer:

Option C is the correct answer.

C.  5•(-20)

Step-by-step explanation:

We are told that the insurance payment for the car follows a certain pattern that can be represented through an expression. The payment is decreasing by $20 every year. As we don't know the total payment amount per period, so we cannot calculate how much is paid per period/year for insurance but we can calculate the rate at which this payment is decreasing.

Change in payment = t * (-20)

The above expressions can be used to calculate the amount of change in payment i payment is decreasing by a constant $20 every year, after t years.

So, if we want to calculate the change in payment after say 5 years, we can replace t with 5 in the equation and calculate the change,

Change in payment = 5 * (-20)

Change in payment = - $100

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the 150 degree part is then

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the area of the shaded shape is the area of the large circle segment minus the area of the small circle segment.

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Ao = pi×45²×5/12 = pi×2025×5/12 = pi×10125/12 =

= pi×3375/4

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= pi×8125/12 = 2127.12 cm²

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