1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Inga [223]
2 years ago
9

Sally's age is 2 plus 3 times John's age. Together, Sally and John's age equals 30. How old is Sally?

Mathematics
1 answer:
chubhunter [2.5K]2 years ago
3 0

Answer:

Sally is 23 years old.

Step-by-step explanation:

John's age is completely unknown, so it is known as x

Meanwhile, Sally's age can be represented as 3x+2

The sum of both ages is 30.

So, x+3x+2=30

Combine like terms.

4x+2=30

Subtract 2 from both sides.

4x=28

Divide both sides by 4.

x=7

John is 7 years old.

Sally's age: 3(7)+2=23

Sally is 23 years old.

You might be interested in
given a point A is on a coordinate plane in quadrant I. if it is rotated 90° counter clockwise then reflecred across the y axis.
den301095 [7]

Answer:

it would be -90⁰ because its clockwise its the opposite direction

7 0
3 years ago
What is the intersection when you graph the following equations:
Natasha2012 [34]

Answer:

its -2x

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
A certain shampoo is available in two sizes. A 12.6-ounce bottle costs $2.37. A 25.3-ounce bottle costs $5.24.
neonofarm [45]

Answer:

The 12.6 oz bottle

Step-by-step explanation:

0.19/oz for the 12.6 oz

0.21/oz for the 25.3 oz

4 0
3 years ago
This has to do with reading graphs and words per page
HACTEHA [7]

Answer:

idont konw but ask google

Step-by-step explanation:

57898765432345678909876543jgfhjfghjfhgjfgj

3 0
3 years ago
Which of the following expressions is correct? Select one: a. marginal cost = (change in quantity of output)/(change in total co
Natasha_Volkova [10]

Answer:

b. average total cost = total cost/quantity of output

Step-by-step explanation:

The marginal cost is the additional cost of producing one more unit of output and it can be calculated by taking the change in total cost and dividing it by the change in quantity, its formula is:

  • <em>Marginal cost = change in total cost/ change in quantity</em>

The average total cost (sometimes referred to simply as average cost) is total cost divided by the quantity of output, its formula is:

  • <u><em>Average total cost = total cost / quantity of output</em></u>

The total cost is obtained adding together the fixed costs and the variable costs, its formula is:

  • <em>Total cost = fixed cost + variable cost</em>

The average variable cost is obtained when variable cost is divided by quantity of output, its formula is:

  • <em>Average variable = variable cost / quantity of output</em>

I hope you find this information useful and interesting! Good luck!

3 0
3 years ago
Other questions:
  • what is the answer to the multiplication problem. Jhon has 20 fish if he lets 6 fish go how many fish dose Jhon have?
    9·1 answer
  • Suzanne owns a small business that employs 555 other people. Suzanne makes \$100{,}000$100,000dollar sign, 100, comma, 000 per y
    9·2 answers
  • A house was valued at 398,000.over several the house increased by 0.08
    8·1 answer
  • If 60 square feet of flooring costs $287.00 how much does one square foot cost?
    6·1 answer
  • I need help and you will revieve 20 points. ​
    9·2 answers
  • Please help! I would really appreciate it!
    6·2 answers
  • What is 8 21/40 put into a decimal
    8·1 answer
  • What is another way to write the equation 3(1.25)+3(2.00)=9.75
    12·1 answer
  • If two sides of a triangle measure 18 centimeters and 22 centimeters what could be the measure of the third side
    5·1 answer
  • Can you pls help me with this question thank you
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!