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Serjik [45]
4 years ago
6

Show the steps and solution explanations.

Mathematics
1 answer:
strojnjashka [21]4 years ago
6 0

Answer:

Step-by-step explanation:

x+4y=6

x+4y=15

-------------

x+4y=6

-(x+4y)=-15

------------------

x+4y=6

-x-4y=-15

---------------

0=-9

no solution

Answer: No Solution

------------------------------------

x+4y=7

3x+12y=21

----------------

simplify 3x+12y=21 into x+4y=7

Answer: Infinitely many solutions

-----------------------------------------------------

x-y=1

2x+y=4

-------------

x=y+1

2(y+1)+y=4

2y+2+y=4

3y=4-2

3y=2

y=2/3

x-2/3=1

x=1+2/3

x=3/3+2/3=5/3

Answer: x=5/3, y=2/3. (5/3, 2/3).

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the cost of living last year went up 11% fortunately Alice Swanson got an 11% raise in her salary from last year this year she i
Mekhanik [1.2K]

Answer:

Her last year salary was $50045.05.

Step-by-step explanation:

Consider the provided information.

Alice Swanson got a 11% raise in her salary this year compared to her salary last year.

This year she is earning $55,550.

Let her last year salary be x.

She get 11% raise and now her salary is $55,550.

This can be written as:

55,550=x+\frac{11}{100} x

55,550=x+0.11x

55,550=1.11x

x\approx 50045.05

Hence, Her last year salary was $50045.05.

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3 years ago
noah and kate are shopping for new guitar strings in a music store. Noah buys 2 packs of strings. Kate buys 2 packs of strings a
marin [14]
One pack of strings is $14. This is because 72-16=56. I subtracted the 16 because it is how much the book cost, so it does not have anything to do with the amount one pack of strings cost. Then, I divided 56 by 4 which equals 14. I divided 56 by 4 because the question is how much one pack is, and Noah and Kate bought a total of 4 packs. This proves that one pack of strings costs $14. 

Hope this helps you!
3 0
4 years ago
In solving the following system by the substitution method, select the one
antoniya [11.8K]

Answer:

d

Step-by-step explanation:

you subsutute the answer x equalys for x

6 0
3 years ago
Read 2 more answers
If you know that a line has a slope of 2/3 and a y-intercept of 7, what is the equation for that line in slope-intercept form?
azamat

I think the answer is y=2/3x+7.

4 0
3 years ago
PLEASE HELP!!!!<br>how to solve 9x^3-16x^2=0 by factoring<br> WILL GIVE BRAINLIEST IF CORRECT!!!!
andreev551 [17]

Answer:

x=5.3

Step-by-step explanation:

Graph each side of the equation. The solution is the x-value of the point of intersection.

x

≈

5.3

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7 0
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