Answer:
Step-by-step explanation:
an = 50
a +(n-1)d = 50
5 + (n-1)*3 = 50
(n-1)*3 = 50 - 5 = 45
n-1 = 45/3
n-1 = 15
n=15+1 = 16
n = 16
Answer:n=10, 5n=50
Step-by-step explanation:
an=50
n=50/a
n=50/5=10
5n=5×10=50
( 20p coins ) (50p coins ) ( 5p Coins )
She exchanges them at the bank for 2 notes.
Circle the number of coins in each bag.
⇒ 10?
⇒ 15?
⇒20?
⇒ 25?
⇒ 40?
how much do they need
508-76 = 432
they need 432
each pencil case costs 2 dollars
divide 432 by 2 dollars to determine the number of pencil cases needed
432/2 =216
they need 216 pencil cases
as an equation
508 =76+2p
Answer: 216 pencil cases