3 years ago

Solve by substitution Y=-3x-14 -2x-y=9

Mathematics

1 answer:

Eva8 [605]3 years ago

4 0

Answer:

X=-2 and y=8. (-2,8)

Step-by-step explanation:

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Need help with the two questions please:)

____ [38]

The decimal form is x=1.2 and the mixed number is x= 1 1/5

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2 years ago

Read 2 more answers

An expression is shown below. Which expression is equivalent to the expression shown?

Vera_Pavlovna [14]

Note: In option A, it should be "+" instead of "(".

Given:

The expression is

$-2x(x+y-3)+3(-x+4y)+y(3x+5y-3)$

To find:

The equivalent expression.

Solution:

We have,

$-2x(x+y-3)+3(-x+4y)+y(3x+5y-3)$

Using distributive property, we get

$=-2x(x)-2x(y)-2x(-3)+3(-x)+3(4y)+y(3x)+y(5y)+y(-3)$

$=-2x^2-2xy+6x-3x+12y+3xy+5y^2-3y$

On combining like terms, we get

$=-2x^2+5y^2+(-2xy+3xy)+(6x-3x)+(12y-3y)$

$=-2x^2+5y^2+xy+3x+9y$

The expression $-2x^2+5y^2+xy+3x+9y$ is equivalent to the given expression.

Therefore, the correct option is A.

6 0

2 years ago

If y =3x-5,and x=5 then y ???

inn [45]

The answer is y equals 10

5 0

3 years ago

If 6:2=8:x, then 6x = 16 6x = 10 2x = 48 2x = 14

Talja [164]

The answer is 6x = 16

3 0

2 years ago

There were four beagles and three golden retrievers what’s the part to part ratio

Sati [7]

Answer:

4:3

Step-by-step explanation:

Think of it like this:

4 beagles to 3 golden retrievers

4 beagles : 3 golden retrievers

4 : 3

Just take out everything but the numbers.

6 0

2 years ago