Let <em>a</em> be the number in the 10s place and <em>b</em> in the 1s place. Then the original two-digit number is 10<em>a</em> + <em>b</em>.
The sum of the digits is 5:
<em>a</em> + <em>b</em> = 5
Subtract 9 from the original number, and we get the same number with its digits reversed:
(10<em>a</em> + <em>b</em>) - 9 = 10<em>b</em> + <em>a</em>
Simplifying this equation gives
9<em>a</em> - 9<em>b</em> = 9
or
<em>a</em> - <em>b</em> = 1
Add this to the first equation above:
(<em>a</em> + <em>b</em>) + (<em>a</em> - <em>b</em>) = 5 + 1
2<em>a</em> = 6
<em>a</em> = 3
Then
3 - <em>b</em> = 1
<em>b</em> = 2
So the original number is 32. Just to check, we have 3 + 2 = 5, and 32 - 9 = 23.
X= total monthly cost
B= # of bowls made
To make one bowl, it's the entry fee plus the price per bowl:
= $9 + $3B
To make 5 bowls, we multiply the above expression by 5. This will give our total cost for the month.
x= 5($9 + $3B)
ANSWER: x= 5($9 + $3B)
Hope this helps! :)
3x-12+5-x=2x-7
2x-7 =2x-7
Means there are infinite solutions.
Answer: the answer is option B. or h(x) = 9x - 18
Step-by-step explanation:
