Two lines, R and M, are represented by the following equations:

1 answer:

6 0

Well, i'm just going to take a stab at this:

The answer out of:
> It is (18,9) ,
> It is (9, 18)
I believe both are correct as those are both plausible coordinates (although I may be wrong)

Line R: 2x + 2y = 18 (x + y = 9)
Line M: x + y = 9
There are infinite many solutions as they are the same line.

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Rod's scores on 4 history tests are 88,96,98,and 90. What score does he need on the fifth test to have a mean score of 94 on all

aleksandrvk [35]

(88+96+98+90+x)/5=94
Add all the numbers
(372+x)/5=94
Multiply both sides by 5
372+x=470
Subtract 372 from both sides
x=98

Double check:
88+96+98+90+98=470/5=94

Hope that helps

7 0

3 years ago

Read 2 more answers

How many grams of a 10% cream must be mixed with 2% cream to prepare 60 grams of a 5% cream?

Blizzard [7]

Answer:

22.5 grams of 10% cream is mixed with 37.5 grams of 2 % cream to prepare 60 grams of 5% cream.

Step-by-step explanation:

Let x grams of 10% cream is mixed with y grams of 2 % cream to prepare 60 grams of 5% cream.

So, x + y = 60 ............ (1) and

$x\times \frac{10}{100} + y \times \frac{2}{100} = 60 \times \frac{5}{100}$