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2 years ago

I need help again please

Mathematics

1 answer:

ehidna [41]2 years ago

6 0

Answer:

7/10, 12/40, 2/20, -10

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PLS help I will give brainliest

Savatey [412]

Answer: 1= X = 8

2= X = 6

3= X = 7

4= X= 9/13 or X= 0.692307

Step-by-step explanation: hope this helps pls mark me brainliest

6 0

3 years ago

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What is the domain of this function?

krok68 [10]

A. {-1,3,5}

Hope this helps. :))

4 0

3 years ago

If ED = 10 and DB = 3x-8, what is the length of EB 1. 32 2. 22 3. 10 4. 20

Debora [2.8K]

Based on the picture, we know that ED is equal to DB. Therefore:

2 times ED=EB
2(10)=20

EB is 20

4 0

4 years ago

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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:

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

5 0

3 years ago

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Two accounts earn simple interest. The balance yy (in dollars) of Account A after xx years can be modeled by y=10x+500y=10x+500.

GrogVix [38]

1)
A has a greater principal

2)
Principal of A is $500, the principal of B is $400, so A's principal is greater by $100

3)
Annual interest rate of A:
10/500 x 100
interest rate of A = 2%
The interest rate of B is higher.

4)
B's annual interest rate is 5% and A's annual interest rate is 2%, so B's is higher by 3%.

6 0

3 years ago