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
Petra jogs 5 miles in 40 minutes. At this rate, how long would it take her to jog 7 miles? Petra would take minutes to jog 7 mil
tatuchka [14]

Answer:

the answer would be 56 minutes.

Step-by-step explanation:

7 x 40 = 280

5n = 280

n = 56

3 0
3 years ago
3[10-(27÷9) HELP PLEASE​
steposvetlana [31]

Answer:

21

Step-by-step explanation:

You do the parentheses first, so 27/9 = 3

10-3 = 7

3 * 7 = 21

8 0
3 years ago
Read 2 more answers
How do you factor x^4-36?
Anettt [7]
X4 over nothing-36 hope this willl work
6 0
3 years ago
Read 2 more answers
What is an equation of the line that is parallel to y=3x-8 and passes through the point (4,-5)
Anna [14]
Pareallell lines have same slope
y=mx+b, m=slope
y=3x-8 so we need
y=3x+b
find b

so given (4,-5)
we can subsitute the point
(x,y)
(4,-5)
x=4 then y=-5

so
-5=3(4)+b
-5=12+b
-17=b


y=3x-17 is equation
D is answer
3 0
3 years ago
280 pages; 10% decrease<br> heLP! mE!
Sever21 [200]
The answer would be 28 pages because 280 divided by 10% or .10 is 28
7 0
2 years ago
Other questions:
  • 15 is 6% of what number?
    13·2 answers
  • A recipe that makes 16 cookies calls for 1/4cup of sugar and 2/3cup of flour. Janelle wants toproportionally increase these amou
    9·1 answer
  • HELPPPPP ASAPPPP!!!!!!
    6·2 answers
  • A line has the same slope as the line 3x+9y=5 and passes though the point (-1,2).what is the equation of the line?
    13·1 answer
  • Find the equation of the axis of symmetry for<br> the parabola y=5x2
    5·1 answer
  • Convert 2x + 2y = 10 ( step by step )
    9·1 answer
  • 9 hundreds equals how many tens
    12·2 answers
  • Leon's mother paid $2.16 for 3 pounds of sugar.<br> How much would 1 pound of sugar cost?
    14·1 answer
  • 3/5<br> meter =<br> centimeters
    10·2 answers
  • 2. Find the length of the midsegment AB.<br><br> 7<br> 10.5<br> 21<br> 30
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!