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
Lady_Fox [76]
3 years ago
13

Joan is 5 years older than Ellen, and 3 years ago the sum of their ages was 17 years. In how many years will Joan be 21 years ol

d?
Mathematics
1 answer:
slavikrds [6]3 years ago
5 0

Answer:

7

Step-by-step explanation:

If J is Joan's current age and E is Ellen's current age, then:

J = E + 5

(J - 3) + (E - 3) = 17

Solve the first equation for E:

E = J - 5

Substitute into the second:

(J - 3) + (J - 5 - 3) = 17

J - 3 + J - 8 = 17

2J - 11 = 17

2J = 28

J = 14

Joan is 14, so in 7 years, she will be 21.

You might be interested in
A cone has a height 25 ft and a radius of 7 ft. Is a reasonable that the volume of this cone is 100 ft3? Why or why not?​
Nostrana [21]

Answer:

No

Step-by-step explanation:

the radius squared is 49 times π, which is roughly 3 means the area of the base is roughly 150 ft².

This means that one third of the height cannot be more than 100 / 150 = 2/3 of a foot. That makes the height about 2 ft, much less than the reported 25 ft.

3 0
3 years ago
Which choice shows a correct way to find 6 × 3 × 5?
Jet001 [13]

Answer:

C

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
4 pounds of grapes cost $11.52. what is the unit rate?
Zepler [3.9K]

Answer: 2.88/1

Step-by-step explanation:

3 0
3 years ago
What possible transforms are shown below?
Maurinko [17]

Answer:

1. A rotation of 90°.

2. A reflection in the y-axis.

4. A translation of 3 units to the left.

5 0
2 years ago
Read 2 more answers
Given that R = 8 x + 4 y Find y when x = 8 and R = 30 Give your answer as an improper fraction in its simplest form.
Maksim231197 [3]

Answer:

y = -17/2

Step-by-step explanation:

Substitute with the givens.

30= 8(8) + 4y.

Multiply parentheses.

30 = 64 + 4y

Subtract.

30-64= -34

-34 = 4y.

Divide each side by 4.

y = - 8.5, or -17/2

hope that is right!

8 0
3 years ago
Other questions:
  • Heni menabung di sebuah bank sebesar RP3.000.000,00.setelah lima bulan uang heni menjadi RP3.258.750,00.tentukan
    13·1 answer
  • What is 30 percent of 60
    8·1 answer
  • What is 25%(percent) Of 42
    7·2 answers
  • The volumes of two similar square pyramids is 128 and 250 meters respectively. The side length of the smaller pyramid is 8 meter
    8·1 answer
  • Use the order of operations to evaluate the expression. 4 × ( 3 4 − 1 2 ) + 3 × 6
    13·2 answers
  • What is 1.67 rounded to the nearest whole number?
    8·2 answers
  • NO LINKS OR ELSE YOU'LL BE REPORTED! Please give me the correct answer.Only answer if you're very good at math.​The weights are
    5·1 answer
  • A doctor has an annual income of $152,125. The income tax that doctor has to pay is 6%. What is the amount of income tax in doll
    11·1 answer
  • Somebody help me with this math plz!!!
    15·1 answer
  • (-7/10+0.15)÷ (-0.125) help? ​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!