Question

Miss Joplin is planning the resources for a maths lesson.

She needs...
• 1 ruler per pupil plus 4 spare
. 5 pieces of dotty paper per pupil
. 5 pieces of card per pupil plus 6 spare.
Write down formulae for the number of rulers (r)
and the amount of dotty paper (d) and card (c).
Use p for the number of pupils.
d =
(6)
There are 21 pupils in the class. How many of
each item does Miss Joplin need?
d =
C в
[3]

Answer 1

The formulas for the number of rulers, dotty paper, and card are r = p + 4, d = 5p, and c = 5p + 6, respectively. For 21 pupils, Miss Joplin will need 25 rulers, 105 pieces of dotty paper, and 111 pieces of card.

Step-by-step explanation:

To write a formula for the number of rulers (r), we treat each pupil as needing one ruler, plus an additional four spare rulers. The formula is:

r = p + 4

For dotty paper (d), each pupil requires five pieces, so the formula is simply:

d = 5p

Similarly, for the card (c), each pupil gets five pieces plus an extra six spare cards. Thus, the formula is:

c = 5p + 6

Given there are 21 pupils in the class, the number of each item Miss Joplin needs can be calculated as follows:

Number of rulers needed: r = 21 + 4 = 25

Number of pieces of dotty paper needed: d = 5 × 21 = 105

Number of pieces of card needed: c = 5 × 21 + 6 = 111

Answer 2

R= p + 1

R= 29

D= 5p

D= 140

C= 5p + 6

C= 146

Step-by-step explanation:

Logic...