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Mathematics

1 answer:

enyata [817]3 years ago

3 0

Dividing by miles per hour is the same as multiplying by hours per mile. You want units of miles and hours to cancel, leaving only units of minutes.

The factor containing minutes must have minutes in the numerator, leaving only the last two selections. The factors containing hours must have hours cancel, leaving only the 3rd selection.

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Work out the value of 5t squared - 7 when t= 4

Viktor [21]

5*4=20 squared is 40

4 0

3 years ago

a system of equations is shown below: equation a: 2c = d − 8 equation b: c = 3d 8 which of the following steps should be perform

Fofino [41]

If you would like to know which of the following steps should be performed to eliminate variable d first, you can find this using the following steps:

equation a: 2c = d - 8 /*(-3)
equation b: c = 3d + 8
__________________
-6c = -3d + 24
c = 3d + 8
__________________
-6c + c = -3d + 24 + 3d + 8
-5c = 32
5c = -32
c = -32/5

<span>The correct result would </span>be: <span>multiply equation a by −3.</span>

3 0

4 years ago

All of the following should be considered when designing a study except __________. A. the type of research method to use B. how

salantis [7]

Answer:

b. How to interpret collected data.

Step-by-step explanation:

5 0

3 years ago

I don't understand this question, please help!

Elanso [62]

U need equation to find how many drawers for 17.5 cubic inches

X is for drawer and Y is for the volume
Y=2.5x. (I found 2.5 for one drawer)

17.5=2.5X which means 17.5/2.5= 7
THE ANSWER IS 7 drawer for 17.5 cubic inches

6 0

3 years ago

The sum of the first four terms in an arithmetic progression is -18 and the sum of the first six terms is -9. Find the sum of th

Yanka [14]

Answer:

Step-by-step explanation:

Let the first term be a and the common difference be d.

So -18=4a+6d and -9=6a+15d. Solving this we get a=-9 and d=3.

So the sum of first 10 terms is 5*(2*(-9)+9*(3))=45

8 0

3 years ago