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Vedmedyk [2.9K]
3 years ago
7

REALIZAR CADA ELERCICIO POR LOS TRES METIDOS EXPLICADOS EN CLASE

Mathematics
1 answer:
meriva3 years ago
5 0

Hello!

Answer:

1. x= 1 / y= 2 / z= -3 / <u>(1 ; 2 ; -3)</u>

2. x= 3 / y= -5 / z= 8 / <u>(3 ; -5 ; 8)</u>

Step-by-step explanation:

                           

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Find the interest earned in an account with $600 invested at 4.5% annual simple interest for 2 years.
astra-53 [7]

Answer:

40%

Step-by-step explanation:

every year the interested be 20%

that's why in 2 years be 40%interest

3 0
3 years ago
Are the ratios 25/45 and 15/27 proportional? Explain.
liberstina [14]
Write them out as a fraction then reduce them. If theyre the same then its proportional.

25/45 can be cancelled down to 5/9

15/27 can be cancelled down to 3/9

So no theyre not.
6 0
2 years ago
Use completing the square to solve for x in the equation (x+7)(x-9) = 25.
balandron [24]

Answer:

x = 1  ±√89

Step-by-step explanation:

We have the equation:

(x+7)(x-9) = 25

Using distributive property:

x(x-9) + 7(x-9) = 25

x²- 9x + 7x - 63 -25 = 0

x²- 2x - 88 = 0

To complete squares we need to add and subtract 1, as follows:

x²- 2x - 88 +1 -1 = 0

x²- 2x +1 -88 -1 = 0    (this is a perfect square)

(x - 1)² - 89 = 0

Solving for x:

(x - 1)² = 89

x - 1 = ±√89

x = 1  ±√89

6 0
3 years ago
Question 2
Slav-nsk [51]

Answer:

wanna help, but please specify what the (2) means.

our take a picture of the problem and makes me post.

4 0
2 years ago
Evaluate   by distributing and find the expression 
Elden [556K]

Answer:

B

Step-by-step explanation:

3 0
3 years ago
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