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

4 0

3 years ago

Read 2 more answers

What is the answer to this problem?

aivan3 [116]

X = 6, y = 8, z = 3
$\frac{3y + x^{2} }{z}$
3(8) + (6)² = 24 + 36 = 60
$\frac{60}{3}$ = 20

7 0

3 years ago

Read 2 more answers

The ratio of girls to boys in a class is 4:3. If the total number of students in the class are 28. How many of them are girls?

Olegator [25]

4x + 3x = 28

7x = 28

7x/7 = 28/7

X = 4

Girls = 4

4x4 = 16

16 girls

7 0

2 years ago

There were 5 people with a Pi-Day shirt on in class with 27 not wearing such a fun

ANTONII [103]

Answer:

377

Step-by-step explanation:

5 / 32 = 59 / x

x = 377.6

6 0

3 years ago