when u have a common a denominator then you just add the numerator that would be 7 and 9. 7 + 9= 16
so ur solution would be 16/22 and then u would simplify by dividing both values by 2.
so the solution is8/11
Answer:
Step-by-step explanation:

Cross multiply,
19.5*k = 10.5 * 6.5

12w+15r=18.30 /*2
15w+10r=16.75 /*3
24w+30r=36.60, subtract this equation from the other one
45w+30r=50.25
21w=13.65
w=13.65/21
w=0.65 is a cost per pound for wheat flour
From the first equation we have
r=(18.30-12w)/15
r=(18.30-12*0.65)/15
r=0.70 is a cost per pound for rye flour
Answer:
56%
Step-by-step explanation:
To find a percentage, you need to take a ration of the value you want and the total. In this case, 28 is the value and 50 is the total, right? Then, to make it a s
proper percentage, you multiply by 100. As such:

Answer:
There are 924 possible combinations
Step-by-step explanation:
Total Number of marbles = 12
Number of marbles to be selected = 6
We are supposed to find the number of possible combinations .
So, we will use combination .
Formula: 
n = 12
r = 6
Substitute the values in the formula :

Hence there are 924 possible combinations