Answer: Lenayah's presentation was 12 minutes long.
Step-by-step explanation:
- Set up a proportion. 2/3 = 8/x.
- Cross multiply. 2x = 24
- Divide both sides by 2. x =12
Answer:
- The equation connecting c and d is: c = kd
- The value of c when d=8 is: 48
- The value of d when c=54 is: 9
Step-by-step explanation:
Proportion can be defined as the effect of changing one quantity on the other.
Given that
‘c’ is directly proportional to‘d’
It can mathematically be written as:
c∝d
A constant is introduced in the equation when the proportionality symbol will be removed. The constant is called constant of proportionality
Given that
c = 24 when d = 4
Putting the values
Putting the value of k
Putting d = 8
Putting c = 54
Hence,
- The equation connecting c and d is: c = kd
- The value of c when d=8 is: 48
- The value of d when c=54 is: 9