1. 7.ee. b.4
bob buys eggs and potatoes at a store.
• he pays a total of $25.92.
• he pays $2.57 for the eggs.
• he buys 5 bags of potatoes that each cost the same amount,
which equation can be used to determine the cost, x, of each bag of potatoes?
a
1
= (25.92 - 2.57) = 5
b
x = 25.92 = 5 + 2.57
x = (25.92 +2.57) = 5
d
x = 25.92 - 5 -2.57

x = (25.92 – 2.57) = 5

Step-by-step explanation:

Bob bought eggs and potatoes at a store.

He pays a total of $25.92 for both the egg and potatoes

He pays $2.57 for the eggs.

He buys 5 bags of potatoes that each cost same amount. The equation that can be used to determine the cost of x, of each bag of potatoes can be calculated as follows:

Let

number bag of potatoes = x

The cost of the whole potatoes he bought =  $(25.92 - 2.57)

The cost of the whole potatoes he bought = $23.35

The cost of 1 bag of potatoes(x) = (25.92 - 2.57)/5

x = (25.92 - 2.57)/5

it is same as

x = (25.92 – 2.57) = 5

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺

i think the length is 12 and the width is 17