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
Luden [163]
2 years ago
8

Kim is 5 years older than her brother Jack. If the sum of their ages is 21, find each of their ages.

Mathematics
1 answer:
yarga [219]2 years ago
7 0

9514 1404 393

Answer:

  • Kim is 13
  • Jack is 8

Step-by-step explanation:

Let k represent Kim's age. Then Jack's age is k-5 and the total of their ages is ...

  k + (k -5) = 21

  2k = 26 . . . . . . . add 5, collect terms

  k = 13 . . . . . . . . . divide by 2; Kim's age

  k -5 = 8 . . . . . . . Jack's age

Kim is 13; Jack is 8.

You might be interested in
Nine buses hold 85 people each. If 693 people buy tickets for a trip, how many seats won’t be taken?
Greeley [361]

Answer:

72

Step-by-step explanation:

you take 85 * 9

85 = # of seats

9 = # of buses

then you get 765

next, you take 765 - 693

765 = # of seats

693 = # people who bought tickets for a trip

finally you get 72

72 = # of empty seats

4 0
2 years ago
120/30=s/5 help plzzzz
ehidna [41]

Answer:

20

Step-by-step explanation:

1. You "cross-multiply" 120 to 5 (120*5).

2. You divide 600 (120*5=600) to 30, which is (600/30).

3. You get the answer which is 20.

6 0
3 years ago
Read 2 more answers
F(x) = square root x-3
aleksandrvk [35]
I think the answer is c
7 0
3 years ago
Slope-intercept form. need help!
belka [17]

Answer:

y=mx+b

Step-by-step explanation:

4 0
3 years ago
Determine the value of x​
Inessa [10]

Answer:

x is an unknown quantity whose value is determined based on any algebraic equation it is used in.

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • What number between 1 and 100 have 12 factors​
    15·1 answer
  • Change 1.49% to a decimal
    15·2 answers
  • At a high school, 18% of the students play football and 6 % of the students play football and baseball. What is the probability
    8·2 answers
  • Laura is paying 1.07x including tax for a sweater that costs x before tax. Write this expression in another way to show the amou
    13·1 answer
  • What is 4664 ➗ by 94
    13·1 answer
  • Tan 21 degrees = 9/x
    7·1 answer
  • Laptops that sell for $660 are on sale with a percent discount of 7%. Find the sale price. Round your answer to the nearest cent
    11·1 answer
  • A trader needs $300000 to improve her business, she deposits $110000 in her savings account at 5% per annum compound interest. s
    6·1 answer
  • The price of an item has risen to $184 today. Yesterday it was $80. Find the percentage increase.
    7·1 answer
  • a) On Wednesday, Harry sold 3 times as many candy bars as on Tuesday. On Thursday, he sold 5 times as many bars as on Wednesday.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!