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4 years ago

Find the value of y for the following system of equations. -x - y = 7 x - y = 9

Mathematics

1 answer:

vladimir1956 [14]4 years ago

7 0

Answer:

y = -8

Step-by-step explanation:

It is given that,

-x - y = 7 ---(1)

x - y = 9 ---(2)

To find the solution

Add eq (1) and eq(2) we get

-x - y = 7 ---(1)

x - y = 9 ---(2)

0 - 2y = 16

y = 16/(-2) = -8

Substitute the value of y in eq(1)

-x - y = 7 ---(1)

-x - -8 = 7

-x + 8 = 7

x = 8 - 7 = 1

Therefore x = 1 and y = -8

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Solve for m. m/9 + 2/3 =7/3

Nuetrik [128]

Answer:

m= 15

Step-by-step explanation:

$\frac{m}{9} + \frac{2}{3} = \frac{7}{3}$

To solve for m, start by moving the constants (numbers that are not attached to any variable) to the other side of the equation.

$\frac{m}{9} = \frac{7}{3} - \frac{2}{3}$

Simplify:

$\frac{m}{9} = \frac{5}{3}$

Multiply both sides by 9:

$m = \frac{5}{3} \times 9$

Crossing out 3 from the denominator and from 9:

m= 5(3)

m= 15

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2 years ago

What is the product? Assume x ≠ 0. 2x^2/3{6/x} 3x 4x 3x2 4x2

Serjik [45]

Answer:

Step-by-step explanation:

The given product is;

$\frac{2x^2}{3}(\frac{6}{x})$

This is the same as;

$\frac{2x^2\times 6}{3\times x}$

We cancel out the common factors to obtain;

$\frac{2x\times 2}{1\times 1}$

Multiply out to obtain;

$\frac{4x}{1}$

Simplify

$4x$

The second option is the correct choice.

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3 years ago

Read 2 more answers

Why do we add the opposite when subtracting integers ?

katen-ka-za [31]

Neagtive means go backwards or oposite
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4 years ago

Zoe is making a quilt using 15 red squares and 30 green squares. Which combination shows the same ratio of red squares to green

Sergio [31]

Answer:

Step-by-step explanation: Well 15:30 I would think is just 1:2 so looking for another ratio like that there's only one other answer. 3:6 15 is half of 30 and 3 is half of 6.

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3 years ago

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PLEASE HELP

horrorfan [7]

Answer:

C(2, 2) is the solution to both lines A and B.

Step-by-step explanation:

Line A is given as:

A straight line labeled A joins the ordered pair 3, 0 and the ordered pair 0, 6.

We know that the equation of a line passing through (a,b) and (c,d) is calculated as:

Hence, the equation of line is:

Hence, equation of line A is:

Similarly B is a line passing through (0,0) and (5,5).

Hence, the equation of line B is:

So, from the graph we observe that, the point of intersection of the two lines is (2,2).

Thus, option C is correct.

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3 years ago