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3 years ago

7

What does the variable k represent in the following equation : k/2 +1/2=3

1 answer:

Nadya [2.5K]3 years ago

4 0

The variable k equals 5

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6x + 4y=10 12x + y= -29

Olin [163]

Answer: x=-3 y=7.

Step-by-step explanation:

$\displaystyle\\\left \{ {{6x+4y=10\ \ \ \ \ (1)} \atop {12x+y=-29\ \ \ \ (2)}} \right.\\ We\ multiply\ both\ sides\ of\ equation\ (1)\ by\ -2:\\\left \{ {{(-2)*6x+(-2)*4y=(-2)*10} \atop {12x+y=-29}} \right. \\\\\left \{ {{-12x-8y=-20} \atop {12x+y=-29}} \right. \\$ $We\ summarize\ equations\ (1)\ and\ (2):\\-7y=-49\\-7*y=-7*7\\Divide\ both\ sides\ of\ the\ equation\ by\ -7:\\y=7.\\We\ substitute\ the\ value\ of\ y\ into \ equation\ (1):\\6x+4*7=10\\6x+28=10\\6x+28-28=10-28\\6x=-18\\6*x=6*(-3)\\Divide\ both\ sides\ of\ the\ equation\ by\ 6:\\x=-3.$

3 0

2 years ago

Can anyone help<br> Me with this math question

nexus9112 [7]

Answer:

B

Step-by-step explanation:

no need to explain

hope it helps

6 0

3 years ago

vovangra [49]

Answer:

OPTION D

Step-by-step explanation: PLS MARK BRAINLIEST :D

8 0

3 years ago

Read 2 more answers

Please help i can’t figure out the scale factor on these polygons

Pani-rosa [81]

Answer: Scale of 2:1

Step-by-step explanation:

All the angles are the same. So its the same polygon just bigger.

Line DA multiplied by a factor of 2 will make is as long as Line ZW.

Line AB multiplied by 2 will also make it equal to Line WX

From that we can assume that Lines XY and YZ are equal to Lines BC and CD

5 0

3 years ago

The bill for the repair of a computer was $179. The cost of parts was $44, and labor charge was $45 per hour. How many hours did

laila [671]

Step-by-step explanation:

44 + 45h = 179

45h = 179 - 44

45h = 135

h = 135/45

h = 3 It took 3h to repair

I hope that help's

8 0

3 years ago