alfie has some photographs printed.the cost is £2.50 for postage and 12 pence for each print. A File uses this formula for the total cost (C) in pence. C=250 + 12n n stands for number of photographs. The total cost for Alfie is £6.70. How many photographs does he have to print?
250+12n=670
12n=420
n =35
That can’t be write because 12n essentially means 12x_=42 and nothing times 12 equals 42. So that is incorrect.
To find the number of photographs Alfie has to print, we will use the formula C = 250 + 12n, where C represents the total cost in pence and n represents the number of photographs.
Given that the total cost for Alfie is £6.70, we need to convert it to pence. Since 1 pound is equal to 100 pence, we can write the total cost as 670 pence.
Now we substitute the values into the formula:
670 = 250 + 12n
To isolate the variable, we subtract 250 from both sides:
670 - 250 = 250 + 12n - 250
420 = 12n
To solve for n, we divide both sides by 12:
420/12 = 12n/12
35 = n
Therefore, Alfie has to print 35 photographs.
To solve this problem, we need to convert the given total cost from pounds to pence. There are 100 pence in one pound, so we multiply £6.70 by 100 to get 670 pence.
Now, we can use the formula C = 250 + 12n, where C is the total cost in pence and n is the number of photographs.
Substituting the given total cost into the formula, we have:
670 = 250 + 12n
To solve for n, we need to isolate it on one side of the equation. First, let's subtract 250 from both sides:
670 - 250 = 12n
420 = 12n
To further isolate n, divide both sides of the equation by 12:
420 ÷ 12 = n
35 = n
Therefore, Alfie has to print 35 photographs.