first work out the value of 2 bags of chips which is: 0.75 + 0.75 = 1.50p
take that away from the total: 22.50-1.50=21 pounds
since what is left (21) is how much 4 ham sandwiches cost we can just divide 21 by 4 which is 5.25
so each sandwich costs 5.25 pounds
Answer:
36
Step-by-step explanation:
The rule for multiplying similar bases with exponents:
(a^b)(a^c)=a^(b+c)
In this case we have:
(5^-2)(5^-1)
5^(-2-1)
5^(-3)
The rule for negative exponents:
a^(-b)=1/(a^b)
So in this case:
5^(-3) is equal to
1/(5^3)
1/125
Answer:
A ≈ 615.75 cm squared
or 616cm squared when rounded off