Use the expression to solve for the number.
2n + 4 = 22
2n = 22 - 4
2n = 18
n = 18/2
n = 9
The number is 9.
Hope this helps :)
So...
ANS of
7(a)=(30)+(n x 20) {n=n. of hours}
7(b)= with my mind
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➷ You are finding how many halves fit into 12
As there are 2 halves in 1, you would just need to double the value
Multiply by the denominator:
12 x 2 = 24
It is 24
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Answer:
Karen needs to spend $4.5 to buy new hair bands.
Step-by-step explanation:
Given:
Hair bands Karen have = 3
cost of 8 hair bands = $1
Total Hair bands she require = 39
Hence Number of of new hair bands require = Total Hair bands she require - Hair bands Karen have = 39 -3 = 36
we need to find how much money she need to spend to buy new hair bands.
cost of 8 hair bands = $1
Cost of 36 hair bands = money need to spend on hair bands
By using Unitary method we get;
Money spend on new hair bands = 
Hence,Karen needs to spend $4.5 to buy new hair bands.