1/Z this is my answer,and hope it can help you
Answer:
2y^-2 * y^3
.25y * y
.25y
Step-by-step explanation:
2y^-2 * y^3
.25y * y
.25y
Answer: 7 years
Step-by-step explanation:
let x be the age of Mary
so John's age will be 2x
the equation becomes
2x+x=21
3x=21
x=21/3
x=7
Answer:
10.3 m/s
Step-by-step explanation:
Speed = Distance / Time
100 metres travelled in 9.7 seconds means that her speed was 100/9.7 metres per second, which is 10.30927... rounded to 10.3 metres per second.
Count be ten for the y axis