Answer:
Roy is 10 years old at present and Joan is 5 years old at present
Step-by-step explanation:
Let
x----> Roy's age
y----> Joan's age
we know that
x=2y ----> equation A
(x+3)+(y+3)=21 ----> equation B
substitute equation A in equation B
(2y+3)+(y+3)=21
solve for y
3y+6=21
3y=21-6
3y=15
y=5 years
Find the value of x
x=2y ----> x=2(5)=10 years
therefore
Roy is 10 years old at present
Joan is 5 years old at present
Answer:
60 words
Step-by-step explanation:
20*/X3=60
Answer: 50 yards by 25 yards
Step-by-step explanation:
rink is also a rectangle
perimeter= 150 yards
length= 2x
width=x
the perimeter of rink is:
p=2(length + width)
150=2(2x + x)
150= 2(3x)
150= 6x
x=150 / 6
x=25
so width is 25 yards and length is twice the width which is 2x
length= 2× 25
length= 50 yards
so the dimension is 50 yards by 25 yards
Answer: I got 1 2/3
Step-by-step explanation:
3/5 divided by 3/5 is 1, and 1 divided by 3/5 is 1 2/3
