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3 years ago

-3x-4ya 2Зr + 3y=-3

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

8 0

Answer:

x= -2 and y=1

Step-by-step explanation:

Given equations:

-3x - 4y = 2

3x + 3y = -3

Adding these two equations, we get:

3y - 4y = -1 ⇒ <em>y=1</em>

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Which is a factor of 144 − 49x2? 12 - 7x2 72 – 7x2 12 – 7x 72 7x.

morpeh [17]

The factors of the given expression $144-49x^{2}$ will be $(7x+12)(7x-12)$

<h3>What will be the factors of the given equation?</h3>

It is given that

$144-49x^{2}$

Now by simplifying it

$(12)^{2} -(7x)^{2}$

Now from the formula, we know

$a^{2} -b^{2} = (a+b)(a-b)$

So it will become

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Thus the factors of the given expression $144-49x^{2}$ will be (7x+12)(7x-12)

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3 years ago

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3 years ago

Which expressions are equivalent to 2(b+3c)?

Rina8888 [55]

Answer:

B. (b+3c)+(b+3c)

C. 2(b)+2(3c)

Step-by-step explanation:

we have

$2(b+3c)$

Distribute the number 2

$2(b+3c)=2b+2(3c)=2b+6c$

Verify each case

case A) 3(b+2c)

distribute the number 3

$3(b+2c)=3b+3(2c)=3b+6c$

$3b+6c \neq 2b+6c$

therefore

Choice A is not equivalent to the given expression

case B) (b+3c)+(b+3c)

Combine like terms

$b+3c)+(b+3c)=(b+b)=(3c+3c)=2b+6c$

$2b+6c= 2b+6c$

therefore

Choice B is equivalent to the given expression

case C) 2(b)+2(3c)

Multiply both terns by 2

$2(b)+2(3c)=2b+6c$

$2b+6c= 2b+6c$

therefore

Choice C is equivalent to the given expression

6 0

3 years ago

Read 2 more answers

-3x-4ya 2Зr + 3y=-3​

-3x-4ya 2Зr + 3y=-3