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3 years ago

3x - 12 + 6x + 9?/ Help Please

Mathematics

2 answers:

Alexeev081 [22]3 years ago

5 0

9x-3 because you combine like terms

iragen [17]3 years ago

3 0

Combine like terms first

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Cole noticed that if he takes the opposite of his age and adds 40 he gets the number 28. how old is Cole?

AnnyKZ [126]

-x+40=28
-x=-12 (subtract 40 from both sides)

Divide by -1(in both sides)because you cant have a negative age.
COLE is 12

To check plug in the values.

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2 years ago

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grigory [225]

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Please help!!!!!! Which is the equation of the line passing through (0, 4) and (8, 0)?

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2 years ago

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saul makes green paint by mixing blue paint. For every 4 gallons of green paint he uses 3 gallons of blue paint .Drag the correc

Aleksandr [31]

Green paint is made by mixing yellow and blue paint. Given that, every 4 gallons of green paint contains 3 gallons of blue paint, how many gallons of yellow paint is in 4 gallons of green paint? Green-blue=yellow
4-3=1 Therefore 1 gallon of yellow paint is in 4 gallons of paint.
The ratio of blue to yellow is 3:1
If there are 16 gallons of green paint, how many gallons blue and yellow are in it? blue= 3 in 4 green
If 16=4
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3/4*16=12 Therefore there are 12 gallons of blue paint in 16 gallons of green paint.
Yellow=1 in 4 gallons
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7 0

2 years ago

Tom, Emma, Robin, and Mary earn an average weekly salary of

alexandr402 [8]

Tom's weekly salary is $155

Step-by-step explanation:

The given is:

Tom, Emma, Robin, and Mary earn an average weekly salary of $170 per person
Tom, Emma, and Robin earn an average weekly salary of $160 per person
Robin makes $5 more per week than Mary
Emma's salary is $\frac{4}{5}$ of Mary's

We need to find Tom's weekly salary

∵ Average average salary = total salaries ÷ number of person

∵ Tom, Emma, Robin, and Mary earn an average weekly salary of

$170 per person

∴ The average = 170 and the number of person = 4

∴ 170 = total salaries of them ÷ 4

- Multiply to sides by 4

∴ 680 = total salaries of them

∴ The total salaries of Tom, Emma, Robin and Mary = $680

∵ Tom, Emma, and Robin earn an average weekly salary of

$160 per person

∴ The average = 160 and the number of person = 3

∴ 140 = total salaries of them ÷ 3

- Multiply to sides by 3

∴ 480 = total salaries of them

∴ The total salaries of Tom, Emma, and Robin = $480

The difference between the 2 total salaries above is the Mary's salary

∴ Mary's salary = 680 - 480 = 200

∴ Mary's salary is $200 per week

∵ Emma's salary is $\frac{4}{5}$ of Mary's

∴ Emma's salary = $\frac{4}{5}$ × 200 = 160

∴ Emma's salary is $160 per week

∵ Robin makes $5 more per week than Mary

∴ Robin's salary = 160 + 5 = 165

∴ Robin's salary is $165 per week

Subtract from the total salaries of Tom, Emma, and Robin the salaries of Emma and Robin to find the salary of Tom

∵ The sum of the salaries of Tom, Emma and Robin = $480

∴ Tom's salary = 480 - 160 - 165 = 155

∴ Tom's salary is $155 per week

Tom's weekly salary is $155

Learn more:

You can learn more about the average in brainly.com/question/9533500

#LearnwithBrainly

4 0

2 years ago