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
N76 [4]
3 years ago
15

the ages of John and Mary total 27 years. Mary's age plus twice john's age is 40. how old is each person?

Mathematics
2 answers:
son4ous [18]3 years ago
4 0
So
Jon's age=j
mary age=m


m+j=27
m+2 times j=40
m+2j=40
M+j=27
ssubtract j from both sides
m=27-j
subsitute 27-j for m
27-j+2j=40
27+j=40
subtract 27 fromboth sdies
j=13

subsitue
13+m=27
subtract 13
m=14

mary=14
john=13
Zielflug [23.3K]3 years ago
3 0
J+M=27
2J+M=40

J=27-M

2(27-M)+M=40
54-2M+M=40
54-M=40
-M=-14
M=14

2J+14=40
2J=26
J=13

John is 13 years old
Mary is 14 years old

You might be interested in
Anyone know the answers 11 through 20?
Evgen [1.6K]

Step-by-step explanation:

11) x^5

12) 5x^2

13) x+21

14) 2x-8

15) 3^3

=3*3*3

=27

16)2^5

=2*2*2*2*2

=32

17) 5^4

=5*5*5*5

=625

18)2 times a number p squared

19)3 times a number m fifth power

20)the addition of half a number and 2

5 0
3 years ago
There are (43)2 ⋅ 40 strawberries on a farm. What is the total number of strawberries on the farm
WINSTONCH [101]

There are 3,440 strawberries on the farm.

Brainliest please :)

7 0
3 years ago
Read 2 more answers
Mary Farmer purchased school supplies for $33.62, an atlas for $23.95, and a CD for $13.78 at Books Express. For all purchases s
ivann1987 [24]
$5.71

good luck and pls mark brainliest if correct
3 0
3 years ago
Read 2 more answers
Could someone plz help me..it's easy but I'm terrible at math sooo
liq [111]
She would have made 12 free throws because if she misses 2 for every ten she misses one every 5 shots fifteen minus 3 is 12
6 0
3 years ago
Write the following linear equations in slope-intercept form:
Vika [28.1K]

Answer:

1) y = 3x - 11

2) y = -2x - 10

3) y = 2x - 5

4) y = -4x + 20

8 0
3 years ago
Read 2 more answers
Other questions:
  • 65 +43-11 =<br><br> Help me plz
    15·2 answers
  • A bakery sold apple pies for $11 and blueberry pies for $13. One Saturday they sold a total of 38 pies and collected a total of
    8·2 answers
  • Write the equation of a line, in point slope form, that has a slope of 2 and passes through the point (-3, 5).
    10·2 answers
  • 2115-0830 in millitary time please and thank you so much if i get it right
    5·1 answer
  • Point P' is the image of P(3,5) under a reflection across the y-axis.
    15·1 answer
  • A population of insects increases at a rate of 1.5% per day. About how long will it take the population to double?
    15·2 answers
  • (3x^2)-18x+(2y^2)+16y+5=0
    15·1 answer
  • Please help it’s geometry :(
    8·1 answer
  • What is the product of these two binomials?
    11·1 answer
  • Suppose you are conducting a study about how the average US worker spends time over the course of a workday. You are interested
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!