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3 years ago

15

vicky has already taken 25 pages of notes on her own and she will take 5 pages during each hour of class. in all how many hours

will vicky have to spend in class before she will have a total of 40 pages of notes in her notebook?

1 answer:

Lilit [14]3 years ago

5 0

The answer 24..................

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A student raises her grade from a 75 to a 90 what is the percent of increas in the students grade average

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Step-by-step explanation:

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2 years ago

I need help with the the answer

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Step-by-step explanation:

We can write

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2 years ago

Four time a number r plus half a number s equals 12. Twice the number r plus one fourth of the numbers s equals 8. What are the

Snezhnost [94]

The system of equations have no solution.

Explanation:

The equations are $4r+\frac{1}{2}s=12$ and $2r+\frac{1}{4} s=8$

To find the two numbers, let us solve the equations using substitution method.

From the equation $2r+\frac{1}{4} s=8$ , let us determine the value of r,

$\begin{aligned} 2 r+\frac{1}{4} s &=8 \\ 2 r &=8-\frac{1}{4} s \\ r &=\frac{1}{2}\left(8-\frac{1}{4} s\right) \\ r &=4-\frac{1}{8} s \end{aligned}$

Let us substitute the value of r in $4r+\frac{1}{2}s=12$ , we get,

$\begin{aligned} 4\left(4-\frac{1}{8} s\right)+\frac{1}{2} s &=12 \\ 16-\frac{1}{2} s+\frac{1}{2} s &=12 \\ 16 &=12 \end{aligned}$

which is not possible.

This means that the system has no solution.

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3 years ago

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look at the angles. they all ad up to 180 degrees devide that by 9, and there you go!

Step-by-step explanation:

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