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3 years ago

Amy can run 1/10 mile per minute. How many minutes will it take Amy to run 3 miles?

Mathematics

2 answers:

uranmaximum [27]3 years ago

6 0

30 minutes because 10X3=30

malfutka [58]3 years ago

6 0

Let us ask the question, "How many minutes will it take Amy to run one mile?"
If she can run 1/10 of a mile in a minute, then in ten minute she can run one mile. How? 10/10 is equal to one. In this case one mile. So, when we multiplied 1/10 by 10 we essentially added 1/10 together. Now we know Amy can run a mile in ten minutes. But what about 3 minutes? To find the answer, we simply divide 3 by 1/10.

3 / 1/10 ; Start
3 * 10/1 ; Invert 1/10
30/1 or just 30 ; Final answer

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What are all the transformations and their meanings?

timama [110]

Translation - a slide up, down, left, or right
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5 0

3 years ago

In a given course a student receives preliminary examination grades of 81, 85, and 95. The final examination is weighed for one-

Vsevolod [243]

Answer:

B. 96

Step-by-step explanation:

Let x represent score of final third exam.

We have been given that in a given course a student receives preliminary examination grades of 81, 85, and 95.

Let us find average of preliminary scores.

$\frac{81+85+95}{3}=\frac{261}{3}=87$

We have been given that the final examination is weighed for one-third and the average of the preliminary grades is weighed as 2/3 of the final grade. This means that final grade is equally weighed into 3 parts. The two parts are 87 each and third part is x.

Using our given information, we can set an equation as:

$\frac{87+87+x}{3}=90$

$\frac{174+x}{3}=90$

$\frac{174+x}{3}*3=90*3$

$174+x=270$

$174-174+x=270-174$

$x=96$

Therefore, the final examination grade should be 96 for a semester average of 90.

4 0

3 years ago

Which polynomial is prime?

finlep [7]

we know that

If the only factors a polynomial are $1$ and itself, then that polynomial is prime.

If the polynomial has at least one root (one x-intercept) then the polynomial is not prime

Using a graph tool

case 1)

$x^{3}+ 3x^{2} + 2x+ 6$

see the attached figure N 1

The polynomial has one root-------> the polynomial is not prime

case 2)

$x^{3} + 3x^{2} - 2x - 6$

see the attached figure N 2

The polynomial has three roots-------> the polynomial is not prime

case 3)

$10x^{2}-4x+3x + 6$

$10x^{2} -x + 6$

see the attached figure N 3

The polynomial has zero roots-------> the polynomial is prime

case 4)

$10x^{2}-10x+6x - 6$

$10x^{2} -4x - 6$

see the attached figure N 4

The polynomial has two roots-------> the polynomial is not prime

therefore

the answer is

$10x^{2}-4x+3x + 6$ ------> is prime

8 0

3 years ago

Read 2 more answers

What is the equation for 6/7 - 1/8=

miv72 [106K]

Another way to put 6/7 - 1/8 is 48/56- 7/56 since the LCM of 7 and 8 is 56 (if you don’t know what that is I can explain it) sorta like subtraction you subtract both numerators (48 and 7 or 48-7) which gives you 41 then you put the denominator (56) below that. So in other words it equals 41/56

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3 years ago

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mr_godi [17]

Answer:

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3 years ago