A bag of apples costs a dollars . A bag of oranges costs 2 dollars more. if Dorie bought 5 bags of apples and 5 bags of oranges , how much did Dorie pay in terms of ? Mark all choices that are true. A 5(2a + 2)
B 10a + 10
С 10a + 2
D 5(a + a + 2)
E 5a + 2a

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

the answer is 1030 it's very simple math.

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75

3.07*10^-4

move the decimal 4 places to the left

.000307