Question

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

1. At the start of winter in Canada the night temperature was-4°C. Thereafter the night temperature was dropped by 4°C each consecutive week.

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

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

4. 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.