Answer:
12 1/2
Step-by-step explanation:
Answer:
We just add numerators and rewrite denominator.
Adding unlike dominators:
We need to find the same denominators. You need to find the least common multiple (LCM) of the two denominators.
Step-by-step explanation:
You mean unlike denominators and like denominators.
Adding like dominators: We just add numerators and rewrite denominator :
Example : ![\frac{1}{4} +\frac{2}{4}=\frac{1+2}{4} =\frac{3}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D%20%2B%5Cfrac%7B2%7D%7B4%7D%3D%5Cfrac%7B1%2B2%7D%7B4%7D%20%20%3D%5Cfrac%7B3%7D%7B4%7D)
Adding unlike dominators:
We need to find the same denominators. You need to find the least common multiple (LCM) of the two denominators.
For example :
![\frac{1}{5}+\frac{3}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B5%7D%2B%5Cfrac%7B3%7D%7B4%7D)
LCM for 5 and 4 is 20 : Now, divide by 5 and multiply by 1 for first fraction. 20 divide by 4 and multiply by 3 :
![\frac{1*4}{20} +\frac{3*5}{20}=\frac{4}{20} +\frac{15}{20}=\frac{19}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B1%2A4%7D%7B20%7D%20%2B%5Cfrac%7B3%2A5%7D%7B20%7D%3D%5Cfrac%7B4%7D%7B20%7D%20%2B%5Cfrac%7B15%7D%7B20%7D%3D%5Cfrac%7B19%7D%7B20%7D)
Answer:
a=2.48
c=9.52
Step-by-step explanation:
a+c=12
4a+7.5c=72.5 Given
a+c=12
-4a-7.5c=-72.5 multiply the equation by negative 1
-3a-6.5c=-60.5 simplify
-3a=-60.5+6.5c add 6.5c to both sides
a=-20.17+2.17c divide it by 3
now you would take that equation and plug it into an equation you already have since you have something to plug in for a, the easiest one to do is a+c=12
(-20.17+2.17c)+c=12 plug in the equation
-20.17+3.17c=12 simplify by solving for c
3.17c=30.17 add 20.17 to both sides
c=9.52 divide both sides by 3.17
now since you have found c, you can plug it in to you equation to solve for a now (use the ones from the second step). I am using the equation a+c=12.
a+9.52=12 plug in the variable and solve for a
a=2.48 subtract 9.52 to both sides
a=2.48
c=9.52
Answer:
xvideos
Step-by-step explanation: