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
kiruha [24]
3 years ago
13

Ralph is 3 times as old as Sara. In 6 years, Ralph will be only twice as old as Sara will be then.

Mathematics
1 answer:
I am Lyosha [343]3 years ago
5 0
R = 3S

R + 6 = 2 (S+6)

Substitute the first equation in the second one:

(3S) + 6 = 2 (S + 6)

3S + 6 = 2S + 12

S + 6 = 12

<u>R = 18
</u>S = 6<u>
</u>
Check:

R is 3 times S now.

In 6 years, R will be (18 + 6) = 24, S will be (6 + 6) = 12.

24 = 2 x 12        yay

You might be interested in
A new law requires that 5% of an individual's income to be invested in the stock market. Your accounts show that you need to put
Kaylis [27]

Divide the amount you need to invest by the percentage.

430/0.05 = 8,600

You earned $8,600

4 0
3 years ago
A car salesperson received a commission of $2100 for a sale of $30,000. What was the rate of commission?
GREYUIT [131]
$2100/$30000 * 100% = 7%

The commission percentage is the commission amount divided by the sale amount, expressed as a percentage.
4 0
3 years ago
Least common denominator between the fractions 1/3 and 2/8
Mekhanik [1.2K]

Answer:

LCD 1

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
write and solve an equation to show thw average number of calendars her 3rd period class sold peer week during the four week cha
kari74 [83]
If they sold 89 calendars over 4 weeks, the 'equation' would look like (x = average calendars sold over 4 weeks):
x =  \frac{89}{4}

If you solve it, you get:
22 \frac{1}{4}

Which is equal to 22.25. Hope this helps!
5 0
3 years ago
Compute the average number of units consumed: 504, 519, 576, 321, 256, 101, 76, 75, 127, 289, 367, and 511.
Komok [63]
The answer is about 310.17.  Just have to add them all together and than divide by 12.

3 0
3 years ago
Read 2 more answers
Other questions:
  • SOMEONE PLZ HELP!! :)
    11·1 answer
  • Hey people how are y’all?
    11·2 answers
  • What percent of $3.60 is $0.36
    9·2 answers
  • Does the trapizoid have at lease 1 pair of parallel sides
    8·2 answers
  • Draw base ten blocks to model division with regrouping for each division expression below
    11·1 answer
  • According to a recent pol, 29 % of adults in a certain area have high levels of cholesterol. They report that such elevated leve
    11·1 answer
  • What Passes through (6,-3) parallel to y= -2x-5?
    12·1 answer
  • What is the value of X
    6·2 answers
  • PLEASE ANSWER THIS RIGHT ASAP
    11·2 answers
  • What is the area of the following circle? D = 2
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!