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Furkat [3]
2 years ago
12

How do I solve this using substitution?

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
8 0

Answer :y=4   x=2

Step-by-step explanation:

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What is the principle square root of 1600?<br> A. -40<br> B. 40<br> C. both
WINSTONCH [101]
The answer is B 40........



7 0
3 years ago
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2) Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95. How m
d1i1m1o1n [39]

Answer:

13 pencils.

Step-by-step explanation:

Let x be the pens and y be the pencils

Given:

Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95.

Total pens and pencils is 22

So, x+y=22----------------(1)

And he bought all utensils for $11.95. and each pen for 75 cents and pencils for 40 cents.

0.75x+0.40y=11.95------------(2)

solve equation 1 and equation 2 for x and y.

From equation 1.

x+y=22

y=22-x----------------(3)

put y value in equation 2.

0.75x+0.4(22-x)=11.95

0.75x+0.4\times 22-0.4x=11.95

0.75x+8.8-0.4x=11.95

0.75x-0.4x=11.95-8.8

0.35x=3.15

x=\frac{3.15}{0.35}

x=9

Now substitute x value in equation 3.

y=22-9

y=13

So, he buy 13 pencils.

5 0
3 years ago
PLEASE HELP! BRAINLIEST!
xz_007 [3.2K]

Answer:

11 - 3x = 75 - -1x

X = -16

Hope this helps

:0 can I have brainliest

Step-by-step explanation:

4 0
3 years ago
Help! i will follow or whatever!! just help me please!
sveta [45]

Answer:

I think it is 50 tell me if it is right

4 0
3 years ago
The ratio of red candies to blue candies is 5:4 in the bag. If there are 20 blue candies in the bag, how many red candies are th
aksik [14]

Answer:

25

Step-by-step explanation:

4/20 is 5 so 5*5 is 25 red candies

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3 years ago
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