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garik1379 [7]
3 years ago
11

How can I solve this?

Mathematics
2 answers:
Crank3 years ago
8 0

Answer:

subtract 8x from one side to get y by itself, whatever you do on one side...you do to the other

Step-by-step explanation:


cestrela7 [59]3 years ago
7 0

subtract y over

8x=14-y

divide by 8

x=(14-y)/8    or x=(7/4)-(y/8)

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Evaluate<br> 5x-2y;x=2,y=-1
Akimi4 [234]

Answer:

8

Step-by-step explanation:

5x - 2y

5 ( 2 ) - 2 ( 1 )

10 - 2

8

8 0
3 years ago
NEED HELP!!!plssssssssssssss
alexgriva [62]

Answer: 1st,2nd, and 4th one

Step-by-step explanation:

5 0
2 years ago
Evaluate: 3² × (-2)³ × 5​
Elan Coil [88]

Answer:

<h2>360</h2>

Step-by-step explanation:

<h3>3^2 × (-2)^3 × 5</h3><h3>= 9 × 8 × 5</h3><h3>= 72 × 5</h3><h3>= 360</h3>

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3 0
3 years ago
Niko bought 4 stamps each week for 3 weeks. He wants to put 6 stamps on each page of his album. How many pages will niko use?
astraxan [27]
You multiply 4 by 3 because he got 4 stamps each week for 3 weeks. That leads to it being 12 stamps in total. 
He wants 6 stamps out of 12 on each page of his album, so you divide 12 by 6 and get two. 
He will use 2 pages.
The tools used were mathematical reasoning, multiplication and division. 
8 0
3 years ago
Find all solutions to x³+3x² − 9x − 27 = 0 by factoring the equation.
SCORPION-xisa [38]

Answer:

The solutions are x=-3,\:x=3

Step-by-step explanation:

To factor this cubic polynomial x^3+3x^2-9x-27 you must:

  • Group the polynomial into two sections

x^3+3x^2-9x-27=\left(x^3+3x^2\right)+\left(-9x-27\right)

  • Factor out -9 from (-9x-27)

(-9x-27)=-9\left(x+3\right)

  • Factor out x^2 from (x^3+3x^2)

(x^3+3x^2)=x^2\left(x+3\right)

x^3+3x^2-9x-27=-9\left(x+3\right)+x^2\left(x+3\right)

  • Factor out common term x+3

-9\left(x+3\right)+x^2\left(x+3\right)=\left(x+3\right)\left(x^2-9\right)

x^3+3x^2-9x-27=\left(x+3\right)\left(x^2-9\right)

  • Factor x^2-9

x^2-9=\left(x+3\right)\left(x-3\right)

x^3+3x^2-9x-27= \left(x+3\right)\left(x+3\right)\left(x-3\right)

x^3+3x^2-9x-27=\left(x+3\right)^2\left(x-3\right)=0

  • Using the Zero Factor Theorem: = 0 if and only if = 0 or = 0

x+3=0, \quad{x=-3}\\x-3=0, \quad{x=3}

The solutions are

x=-3,\:x=3

3 0
3 years ago
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