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kvasek [131]
3 years ago
11

If x = 2y + 3 and 4x – 5y = 9, what is the value of y? A. 2 B. 1 C. -1 D. -2

Mathematics
1 answer:
maria [59]3 years ago
6 0

Answer:

Steps shown in picture provided

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Simplify 2(2x+6)+6(2x+2)+5=16x+30
Debora [2.8K]

Answer:

16x=16x+1

0=1

Step-by-step explanation:

4x+12+12x+12+5=16x+30

16x+29=16x+30

16x=16x+1

4 0
2 years ago
Solve the system of linear equations.
icang [17]

Answer: The set does not have a solution

Step-by-step explanation:

Adding Equations 1 & 3 we get 5x = 7. This gives x = 7/5

Putting this value of x in eq. 2 we get

-2y + 2z = -1-(7/5) or

2y - 2z = 12/5  or  5y - 5z = 6

Multiplying eq. 1 by 2  we get  

4x + 2y - 2z = 6

adding this with eq. 2 we get 5x = 5 or x = 1

As the common solution for x from equations 1&3 does not satisfy eq. 1&2 it comes out that the three equations do not have a common solution.

Same can be verified by using different sets of two equations also.

7 0
4 years ago
Choose the product. -6p3(3p2 + 5p - 1) -18p5 - 30p4 + 6p3 -18p6 - 30p3 - 6p 18p3 + 6p2 - 30p4 -18p6 - 24p3
wlad13 [49]
-6p^3(3p^2 +5p -1) = -18p^5 -30p^4 +6p^3

so this is the right answer sure 
7 0
3 years ago
Find the slope of the line running<br> through these two points (-4,5) and (8,-3)
Artemon [7]

Answer:

The slope is

\frac{-3-5}{8-(-4)} =\frac{-8}{8+4} =\frac{-8}{12} =-\frac{2}{3}

Step-by-step explanation:

8 0
3 years ago
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Complete the equation <br> 9/4= ? ÷ by 4
Stells [14]

Answer:

9

Step-by-step explanation:

9/4 can be said as "9 divided by 4", so the ? is 9.

8 0
3 years ago
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