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lianna [129]
3 years ago
5

If x + 2y = 8, and x - y = 5, what is the value of x?

Mathematics
1 answer:
klemol [59]3 years ago
4 0

Answer:

x = 6

Step-by-step explanation:

<em>Let's solve y for x + 2y = 8.</em>

x + 2y = 8

2y = -x + 8

y = -\frac{1}{2}x + 4.

<em>Let's solve y for x - y = 5.</em>

x - y = 5

y = x - 5

<em>Since both equations have been solved for y, we can combine them together into one!</em>

x - 5 = -\frac{1}{2}x + 4

x + \frac{1}{2}x = 4 + 5

1.5x = 9

x = 6

Hope this helped! If not, please let me know!

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Explain the equasion how to get the answer to how 1/3 of a carton of eggs equals 4
user100 [1]
A carton of eggs is usually 1 dozen, which is 12 eggs. 1/3 of 12 is 4. You get 4 by multiplying 12 times 1/3.

=12(1/3)
=12/3
=4

Hope this helps! :)
4 0
3 years ago
1. The perimeter of a piece of paper is 18 cm.
OlgaM077 [116]

Answer:

a) length = 3 and width = 6

Area of the rectangle = 3 × 6 = 18 cm²

b)  length = 7 and width = 2

Area of the rectangle = 7 × 2 = 14 cm²

c)  length = 5 and width = 4

Area of the rectangle = 5× 4 = 20 cm²

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given perimeter of the paper = 18 cm

we know that the paper has a rectangle shape

The perimeter of the rectangle = 18 cm

 2( l + w ) = 18

a)

we choose length = 3 and width = 6

The perimeter of the rectangle = 2( 3+6) = 18 cm

Area of the rectangle = 3 × 6 = 18 cm²

b)

we choose length = 7 and width = 2

The perimeter of the rectangle = 2( 7+2) = 18 cm

Area of the rectangle = 7 × 2 = 14 cm²

c)

we choose length = 5 and width = 4

The perimeter of the rectangle = 2( 5+4) = 18 cm

Area of the rectangle = 5× 4 = 20 cm²

3 0
2 years ago
Help please need it fast
inysia [295]
I’m pretty sure the correct answer is B
5 0
2 years ago
Solve each equation with the quadratic formula. 4n^2+7n-1=-4
andreyandreev [35.5K]
The answer i got was
n=-3/4,n=-1
7 0
3 years ago
Is this right? If not let me know and explain how if u can. <br><br><br> (No link &lt;3)
vlabodo [156]

Answer:

9/35

Step-by-step explanation:

There are a total of 15 bulbs to choose from randomly. First a new bulb is chosen. Chance is 9/15 because 9 out of 15 are new.

Then there are only 14 bulbs left. Then a used bulb is chosen. Chance is 6/14 since 6 out of remaining 14 are used.

Total chance for this to happen is 9/15 * 6/14 = 54/210 = 9/35.

8 0
3 years ago
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