Hailey ran a few laps. D(n) models the duration (in seconds) of the time it took for Hailey to run her n lap. When did her lap duration increase

Answers

Answer 1
Answer:

Answer:

during the 7th and the 9th lap

Step-by-step explanation:

I just did it

Answer 2
Answer:

Answer:

2 hours

Step-by-step explanation:



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Solve the system of equations below y=3/2x-2 and 2x+y=-4
What fraction of 1 minute is 47 seconds

I rlly need help someone pls help

Answers

true because it’s the exact same
i think the answer is false. in order for those angles to be the same, 4 and 5 would also need to be the same, which they are not, but there is virtually no way to tell without numbers. however i believe the answer is false

What percentage of the shape is purple

Answers

the answer is going to be: 75%

Answer:

75% of the circle is purple

Step-by-step explanation:

this circle is split into 4ths, meaning each piece is equivalent to 25%. And since 3 pieces are purple, you multiply 25x3 to get 75. Leaving 25% of the circle white.

The quotient of twice a number t and 12

Answers

2t/12 would be your expression.

Simplify the following algebraic expressions.

-6x + 5 + 12x -6

Answers

The answer is 6x-1.  

Your test grades in math this semester are 96, 100, 72, and 85. Find your mean grade. This is mean median and mode. A) 90.75 B) 88.25 C) 86.50 D) 84.00

Answers

B. 88.25

To find mean, you need to add all numbers given, then divide by the amount of numbers you have, therefore:

96 + 100 + 72 + 85
353

353 / 4

88.25

Solve for x. 4−(2x+4)=5 A x=−52 B x=6 C x=32 D x=−10

Answers

Answer:

x = -5/2

Step-by-step explanation:

4−(2x+4)=5

Distribute the minus sign

4 - 2x -4 = 5

-2x =5

Divide by -2

-2x/-2 = 5/-2

x = -5/2

Answer:

x=-5/2

Step-by-step:

First we multiply -(2x+4) = -2x -4

Now the equation is 4-2x-4 = 5

Combine like terms.

4-4=0

-2x = 5

Divide both sides by -2

Therefore your answer is -5/2

Hope this helps!