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3 years ago

What is the acceleration of a runner who goes from 1.4 m/s to 2.2 m/s in fourseconds?

Mathematics

2 answers:

Oksi-84 [34.3K]3 years ago

6 0

The answer is 0.2 m/s/s

rusak2 [61]3 years ago

5 0

Find the difference in speed:

2.2 - 1.4 = 0.8 m/s

Now divide the difference in speed by time:

0.8 m/s / 4 seconds = 0.2 m/s/s

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A 40-inch board is to be cut into three pieces so that the second piece is 3 times as long as the first piece and the third piec

tiny-mole [99]

Answer:

The first piece is 5 inches long, while the second is 15 inches and the third one is 20 inches.

Step-by-step explanation:

To determine the length of the 3 pieces, knowing that the total of the board is 40 inches, and that the second measures 3 times more than the first and the third measures 4 times more than the first, the following equation must be performed:

X + 3X + 4X = 40

8X = 40

X = 40/8

X = 5

Therefore, the first piece is 5 inches long, while the second is 15 inches and the third 20 inches.

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2 years ago

Weights of babies at the local community hospital have a distribution that is approximately normal with a mean weight of 7.43 po

KengaRu [80]

Answer:

Step-by-step explanation:

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4 0

3 years ago

5n + 5= 45 Please help... constant=_, coefficient=_

madreJ [45]

Answer:

Step-by-step explanation:

5n + 5 = 45

Coefficient of n = 5

Constant = 5 & 45

8 0

2 years ago

Read 2 more answers

Suppose you have ordered one medium onion ring and one 16oz chocolate shake from Burger King. The onion rings have 19 grams of f

dsp73

Part A:

23 + 13x ≤ 81

Part B:

23 + 13x ≤ 81

-23 -23

13x ≤ 58

/13 /13

x ≤ 4.46

Part C:

This means that you can have 4 cheeseburgers while keeping the fat under 81 grams.

5 0

3 years ago

Find the inverse of the given function.

kodGreya [7K]

For this case we must find the inverse of the following function:

$f (x) = - \frac {1} {2} \sqrt {x + 3}$

We follow the steps below:

Replace f(x) with y:

$y = -\frac {1} {2} \sqrt {x + 3}$

We exchange the variables:

$x = - \frac {1} {2} \sqrt {y + 3}$

We solve for "y":

$- \frac {1} {2} \sqrt {y + 3} = x$

Multiply by -2 on both sides of the equation:

$\sqrt {y + 3} = - 2x$

We raise both sides of the equation to the square to eliminate the radical:

$(\sqrt {y + 3}) ^ 2 = (- 2x) ^ 2\\y + 3 = 4x ^ 2$

We subtract 3 from both sides of the equation:

$y = 4x ^ 2-3$

We change y by f ^ {- 1} (x):

$f ^ {- 1} (x) = 4x ^ 2-3$

Answer: $f ^ {- 1} (x) = 4x ^ 2-3$

7 0

3 years ago

Read 2 more answers