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2 years ago

Which statements about the system are true? Check all that apply.Y = x – 4 3y – x = –7

Mathematics

1 answer:

nirvana33 [79]2 years ago

6 0

The solutions are x = 2.5, y = -1.5, but what are the statements?

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What is the value of the rational expression 2x^2+5x+9/x^2+2x-1 when x=-2

Sergio039 [100]

Answer:

The value of the Rational expression when $x=-2$ is: $-7$

Step-by-step explanation:

For this exercise is important to remember:

When a negative number is raised to an even power, the result will be positive.
The multiplication of signs:

$(+)(+)=+\\(-)(-)=+\\(-)(+)=-$

Then, given the following Rational expression:

$\frac{2x^2+5x+9}{x^2+2x-1}$

You need to follow these steps in order to find its value when $x=-2$ :

1. Substitute the given value of "x" ( $x=2$ ) into the expression:

$\frac{2(-2)^2+5(-2)+9}{(-2)^2+2(-2)-1}$

2. Evaluate and simplify:

$\frac{2(4)+5(-2)+9}{4+2(-2)-1}=\frac{8-10+9}{4-4-1}=\frac{7}{-1}=-7$

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2 years ago

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Need help asap pls pls pls

Sliva [168]

Answer:

bqidhiwodxh

Step-by-step explanation:

627e29302990331 e7894094902

27290[

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2 years ago

Kathie spent $38 on a fruit salad. She bought bananas, mangoes, and pineapples. Bananas cost $1 per pound, mangoes cost $2 per p

devlian [24]

Answer: X * 1 + Y * 3 + Z * 2 = 45

Step-by-step explanation: we will use bananas, apples and mangoes as the unknowns of the equation.

The value that you multiply to the unknowns will be multiplied by the price that corresponds to it.

These 3 products must be added to result in the total value that is 45.

X * 1 + Y * 3 + Z * 2 = 45

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2 years ago

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In a newspaper, it was reported that the number of yearly robberies in Springfield in 2011 was 175, and then went down by 8% in

barxatty [35]

Answer:I think the answer is C

Step-by-step explanation:

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2 years ago

PLEASE ANSWER QUICK!!!

aivan3 [116]

Answer:

(0,5) and (1,0)

Step-by-step explanation:

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2 years ago