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Nataliya [291]
2 years ago
8

What is the x-value in the solution to this system of linear equations? 2x − y = 11 x + 3y = −5

Mathematics
1 answer:
Setler [38]2 years ago
4 0

Answer:

x = 4

Step-by-step explanation:

Given the 2 equations

2x - y = 11 → (1)

x + 3y = - 5 → (2)

Multiply (1) by 3 and add to (2) to eliminate the y- term

6x - 3y = 33 → (3)

Add (2) and (3) term by term to eliminate y, that is

7x = 28 ( divide both sides by 7 )

x = 4

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MArishka [77]

Answer:

7 fiction and 23 non- fiction

Step-by-step explanation:

The number of non-fiction read was 5 less than 4 times the number of fiction books.

Assume fiction books are x.

An equation representing this would be:

x + (4x - 5) = 30

5x - 5 = 30

5x = 30 + 5

x = 35 / 5

x = 7 fiction books

Non-fiction books:

= 4x - 5

= 4 * 7 - 5

= 23 non - fiction books

3 0
2 years ago
Read 2 more answers
Bicillin 300,000 units Im a 12 hrs on hand 600,000 units/1.2 ml how much to give
enyata [817]
<span>Give by deep IM inj into upper outer quadrant of buttock; rotate inj sites. Upper respiratory Group A strep: 1.2 million units once. Syphilis (primary, secondary, latent): 2.4 million units once; (tertiary and neurosyphilis): 2.4 million units every 7 days for 3 doses. Rheumatic heart disease, acute glomerulonephritis: 1.2 million units once per month, or 600,000 units every 2 weeks.</span>
6 0
3 years ago
For how many days, x, can Michelle make a $2 donation if she wants to make a donation of $12 total?
ad-work [718]

Answer:

6

Step-by-step explanation:

12/2=6

5 0
3 years ago
18/25 equals 126/?<br><br>Help, my dudes!<br><br>What does that question mark represent?
kap26 [50]

Answer:

the "?" represents the number 175

Step-by-step explanation:

126/18=7

so, you would multiply the 25 by 7 to get 175

hope this helps!

4 0
3 years ago
The lengths of the sides of a rectangle are 12.4 and 26. What are the measures of the angles between its diagonals? Round your a
Sergeu [11.5K]

Answer:

129 and 51 degrees.

Step-by-step explanation:

Drawing a diagonal gives us a triangle  with the opposite side = 12.4 and the adjacent side = 26.

tan x = 12.4 / 26

x = 25.497 degrees.

The other angle will be 90 - 25.497

= 64.503 degrees.

One of the diagonal angles is  180 - (2*25.497)

= 129 degrees

and the other  is 180 - 129 = 51 degrees.

8 0
3 years ago
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