Question

Follow the reasoning above, solve for p in the equation below and explain each step:

At the start of winter in Canada the night temperature was –4 °C. Thereafter the night temperature

dropped by 4 °C each consecutive week.

Themba had six marbles. He plays marbles at school and wins three marbles each day. On day 8 he has 30 marbles.

Mpho sends SMSs every day. Each SMS costs R2. After 14 days her cell phone account is –R28

.

An ice cream vendor sells five ice creams every hour. After six hours he has sold 30 ice creams. 

Answer 1

1.

Temperature:

$T=-4-4p$

where p is the number of weeks.

2.

$6+3p=30$

$p=8$ is the number of days

3.

$2\cdot14p=28$

$p=R1$ is the number of SMS per day

4.

$6p=30$

$p=5$ is the number of sold ice creams every hour.