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777dan777 [17]
3 years ago
7

2x+y=-2

Mathematics
1 answer:
Over [174]3 years ago
8 0

A

given the 2 equations

2x + y = - 2 → (1)

x + y = 5 → (2)

subtract (2) from (1) term by term to eliminate y

(2x - x ) + (y - y ) = (- 2 - 5 )

x + 0 = - 7 ⇒ x = - 7

substitute x = - 7 in either of the 2 equations and solve for y

(2) : - 7 + y = 5 ( add 7 to both sides )

y = 5 + 7 = 12 → A


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What is the equation of a line that is parallel to y=5/6x-10 and passes through (12,8)?
Gekata [30.6K]

Answer:

y-8=5/6(x-12)

Step-by-step explanation:

y-y1=m(x-x1)

y-8=5/6(x-12)

8 0
3 years ago
1. Which of the following questions has a constant of
garik1379 [7]

Answer:

In B)  y = x/7 , the constant of proportionality is 7.

Step-by-step explanation:

Two quantities X and Y are said to be in proportion if and only if

X = kY   or, \frac{X}{Y}  = k,

where k =  Proportionality Constant.

Here, 7 is the constant of proportionality. Then,

A .   y = 14x

here, \frac{y}{x}  = 14  ≠ 7

B .   y = x/7

here, \frac{x}{y}  = 7  = constant of proportionality .

C.   y = x

here, \frac{y}{x}  = 1  ≠ 7

4 0
3 years ago
$18.39 is what percent of $329.64?​
pickupchik [31]

18.39 is 5.58% of 329.64.

We have to find that 18.39 is what percent of 120?

First, make the assumption that 329.64 is 100% as it is our output value.

We next represent the value we seek with x, therefore

100% = 329.64                  

And, x% = 18.39                

Now, we get pair of simple equations

100% = 329.64                  ........(1)

x% = 18.39                         ........(2)

Now by simply dividing equation 1 by equation 2 and note of the fact that the LHS of both equations have the same unit (%);

100% / x% = 329.64 / 18.39

Taking the reciprocal of both sides, we get

x% / 100% = 18.39 / 329.64

or x = 5.58%

Hence, 18.39 is 5.58% of 329.64.

To learn more about percentages, visit: brainly.com/question/14319057

#SPJ9

6 0
2 years ago
Factorise<br> x<br> 2<br> +<br> 2<br> x<br> −<br> 48
Hatshy [7]

Answer:

x^2+ 2x +-48

product: -48  sum: 2

8, -6

x^2 +8x - 6x - 48

=> x(x+8) -6(x+8)

=> (x+8)(x-6)

Hope it helps...........

8 0
2 years ago
If 2/3 is multiplied by a fraction greater than 1, which of these could be the product?
anygoal [31]

The product would need to be greater than 2/3.

6 0
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