All categories

3 years ago

Solve using elimination. 9x − 9y = –18 10x − 9y = –13

Mathematics

1 answer:

masha68 [24]3 years ago

5 0

Answer:

y = 5, y = 7

Step-by-step explanation:

You might be interested in

Anyone know these, I’m confused?

alisha [4.7K]

Tuv is equal to 127

5 0

3 years ago

Read 2 more answers

What is the simplify rational expression for 10b + 100

igor_vitrenko [27]

Answer:

10 (b+10)

Step-by-step explanation:

10b + 100

Factor out a 10

10 *b + 10*10

10 (b+10)

7 0

3 years ago

Read 2 more answers

Find the eighth term of the

Darya [45]

Answer:

a(8) = -0.0027

Step-by-step explanation:

The most general formula for a geometric sequence is a(n) = a(1)*r^(n-1), where a(1) is the first term and r is the common ratio.

Here, the formula becomes a(n) = 6*(-1/3)^(n-1).

Substitute 8 for n to find the eighth term:

a(8) = 6*(-1/3)^(8-1), or a(8) = 6(-1/3)^7, or a(8) = -0.0027

7 0

3 years ago

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:

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

5 0

3 years ago

Read 2 more answers

Plz help me 25 pointssss!!!!!! Thxx <3

satela [25.4K]

Answer:

how should I help you with

7 0

3 years ago

Read 2 more answers