Mathematics, 05.03.2020 23:04 superbatman9193

Jackie runs and dances for a total of 55 minutes every day. She dances 25 minutes more than she runs.

Part A: Write a pair of linear equations to show the relationship between the number of minutes Jackie runs (x) and the number of minutes she dances (y) every day.

Part B: How much time does Jackie spend running every day?

Part C: Is it possible for Jackie to have spent 45 minutes dancing every day? Explain your reasoning.

Answers: 1

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Answer from: katerin5168

Part A: The pair of linear equations is

x + y = 55

y = x + 25

Part B: Jackie spends 15 minutes running every day

Part C: It is impossible for Jackie to have spent 45 minutes dancing if she runs and dances for a total of exactly 55 minutes and dances for 25 minutes longer than she runs

Step-by-step explanation:

The given:

Jackie runs and dances for a total of 55 minutes every day

She dances for 25 minutes longer than she runs

Jackie runs for x minutes

She dances for y minutes every day

∵ Jackie runs and dances for a total of 55 minutes every day

∵ Jackie runs for x minutes and dance for y minutes every day

- Add x and y, then equate the sum by 55

∴ x + y = 55 ⇒ (1)

∵ She dances for 25 minutes longer than she runs

- Equate y by the sum of x and 25

∴ y = x + 25 ⇒ (2)

Part A: The pair of linear equations is

x + y = 55

y = x + 25

Let us solve the system of equations

Substitute y in equation (1) by equation (2)

∴ x + x + 25 = 55

- Add the like terms in the left hand side

∴ 2 x + 25 = 55

- Subtract 25 from both sides

∴ 2 x = 30

- Divide both sides by 2

∴ x = 15

Part B: Jackie spends 15 minutes running every day

Substitute the value of x in equation (20 to find y

∵ y = 15 + 25

∴ y = 40

∴ Jackie spends 40 minutes dancing every day

Jackie can not dance for 45 minutes if she runs and dances for a total of exactly 55 minutes and dances for 25 minutes longer than she runs because 45 - 25 = 20 so she runs for 20 minutes and 45 + 20 = 65 minutes not 55

∴ it is impossible

Part C: It is impossible for Jackie to have spent 45 minutes dancing if she runs and dances for a total of exactly 55 minutes and dances for 25 minutes longer than she runs

PLEASE ADD ME AS BRAINLIEST!!!

Answer from: lea5261

answer:

Part A: Write a pair of linear equations to show the relationship between the number of minutes Jackie runs (x) and the number of minutes she dances (y) every day.

Step-by-step explanation:

Answer from: Quest

means if you're already damaged some way when you take out a medical insurance you will not get full compensation for that injury that you already have.

Answer from: Quest

step-by-step explanation:

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