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Pie
3 years ago
11

-3x+3y=4 -x + y = 3 solve using elimination

Mathematics
1 answer:
viktelen [127]3 years ago
4 0

Answer:

No solution

Step-by-step explanation:

-x + y = 3

-3x + 3y = 4

Multiply top by -3

3x -3y =-9

-3x +3y = 4

0 = -5

No Solution

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What expression is equivalent to -3+2/3y-4-1/3y
Neko [114]

Answer:

The simplified form of the given expression is -7 + (\frac{1}{3})y

Step-by-step explanation:

Here, the given expression is:

-3 + (\frac{2}{3}) y - 4 - (\frac{1}{3})y

Now to simplify the given expression, perform operations on LIKE TERMS:

We get:

-3 + (\frac{2}{3}) y - 4 - (\frac{1}{3})y  =( -3  - 4)  + [(\frac{2}{3}) y- (\frac{1}{3})y]\\= - 7  + [(\frac{2}{3}) -(\frac{1}{3})]y  = -7 + [\frac{2-1}{3}]y\\ = -7 + (\frac{1}{3})y\\ \implies -3 + (\frac{2}{3}) y - 4 - (\frac{1}{3})y =   -7 + (\frac{1}{3})y

Hence the simplified form of the given expression is -7 + (\frac{1}{3})y

6 0
3 years ago
Bob’s monthly phone bill is made up of a $10 fee plus $0.05 per minute. Bob’s phone bill for July was $22. Write an equation to
Blizzard [7]

Answer:

equation: 10 + 0.05x=22

Step-by-step explanation:

the next step after writing the equation would be to subtract 10 from both sides to get 0.05x=12. after this you would then have to divide 12 by 0.05 to get 240 minutes. you could check it by putting 240 in for x to get 10+0.05(240)=22. you would then multiply 0.05 by 240 to get 12 and then add 10 onto it to get 22 which was already given.

5 0
3 years ago
Read 2 more answers
Enrollment in a photography class increased from 25 to 35 students. What was the percent of increase in enrollment?
DaniilM [7]
About 29%.
35 - 25 = 10, or the amount of change
10 / 35 = .285, or the amount of change over total
3 0
4 years ago
Suppose you use have $50 and earn $8 per hour. How many hours must you work until you have $170
Nataly_w [17]
15.   $170-$50= $120/$8= $15
4 0
3 years ago
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When two of the three numbers are added at a time, the possible sums are 32, 39, 23. What is the sum of all three numbers?
arsen [322]

Answer:

47

Step-by-step explanation:

Let a, b, and c be those three numbers.

When two of the three numbers are added at a time, the possible sums are 32, 39, 23. Let

a+b=32\\ \\a+c=39\\ \\b+c=23

Add these three equations:

a+b+a+c+b+c=32+39+23\\ \\2a+2b+2c=94

Divide this equation by 2:

a+b+c=47

The sum of all three numbers is 47.

4 0
4 years ago
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