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morpeh [17]
4 years ago
8

WILL MARK BRAINLY IF CORRECT!

Mathematics
1 answer:
bogdanovich [222]4 years ago
6 0

Answer:

15

Step-by-step explanation:

The given equation is

12( -  \frac{1}{6}x  -  \frac{2}{3}y =  - 5)

5( \frac{2}{5} x +  \frac{1}{5} y =  - 9)

When we multiply we obtain the equations:

- 2x  -  8y =  - 60

2x + y =  - 45

We add both equations to obtain:

- 7y =  - 105

Divide both sides by -7 to get:

y =  \frac{105}{7}  = 15

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A. Jerry an electrician worked 7 months of the year. What percent of the year did he work?
svlad2 [7]

a. the percent of 12 is 7 because  12 months eqauls 1 year so first  you multiply the opposites seven times a hundred equals seven hundred , two you divide by twelve by seven hundred and you 58.33 ( rounded to hundredth.

3 0
3 years ago
Evaluate x 3 for x = 2.
solong [7]
If you mean 3x then that would be 6

hope this helps you
6 0
4 years ago
PICTURE BELOW / What is the volume of this cube?
Rama09 [41]

Answer:

74.088

or 74.09

Step-by-step explanation:

<h2>4.2³=</h2>

 4.2

 4.2

x4.2

74.088

<em>Rounded</em>

<h2>   ↓</h2><h3> 74.09</h3>
3 0
3 years ago
Read 2 more answers
PLEASE HELP<br> Identify the first five terms of the sequence in which a, = 3n2 - 1.
Neko [114]

Step-by-step explanation:

you cannot just put the actual numbers in and calculate ?

and you can't provide the correct problem statement, as it seems.

I assume you mean

an = 3n² - 1

a sequence starts with a1, so, n>=1

a1 = 3×1² - 1 = 3-1 = 2

a2 = 3×2² -1 = 3×4 - 1 = 12 - 1 = 11

a3 = 3×3² - 1 = 3×9 - 1 = 27 - 1 = 26

a4 = 3×4² - 1 = 3×16 - 1 = 48 - 1 = 47

a5 = 3×5² - 1 = 3×25 - 1 = 75 - 1 = 74

there, that is all there is to it. you really needed help with that ?

6 0
3 years ago
I need help with this two questions.
mezya [45]
Always get rid of denominators first. Multiply both right and left side by 6
-7 (6) = -c (6)/6 + 12(6)
-42 = -c + 72
c = 72 +42
c = 114

rearrange like terms together
42 = 18 - 4x
4x = 18 -42
4x = -24
divide both sides by 4
x = -6
8 0
4 years ago
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