-17 (c-d)
n = nickels
p= pennies = 2n -5
the mean is 8 apples/bag
12 bags x 8 apples/bag = 96 apples
so far you have 11 bags and 6 + 28 + 16 + 27 + 10 = 87 apples
you'll need to have 9 apples in the 12th bag to have an average of 8 app/bag
n = nickels value = .05 n
d = dimes = (50-n) value = .10 (50-n) values summed = 3.40
.05n + .1 (50-n) = 3.4 solve for 'n' the number of nickels, then dimes = 50-n
As you can see....only one number, 26 is in the intersection
even numbers above 20 and less than 50... 22 24 26 .....48 14 numbers 1 out of 14 = 1/14
.22 (5) + .90 (12) = x ( 5 +12) solve for 'x' the decimal percentage of the resulting alloy
100% is the number of people in the survey
-10% = 90%
70% - 4000 + 60% - 4000 + 4000 = 90
130% - 4000 = 90%
-4000 = -40%
100% = 10 000 people
A. P = 2 · 3 x if this is actually 2 * 3x
B. P = 2 · x 3
C. P = 3 · x 2
D. P = 3 · 2 x
w or p x s p k n x c s r m n
2 x 4 x 5 = ......
here is one
1 2 3
5 4 6
7 8 9
11 10 12 there are many more....see Alan's answer below:
2 j + 6a = 12
5j + 3a = 15 Multiply by -2
-10j - 6a = -30 add to first equation
-8j = -18 solve for j then use this value of ' j' to calculate 'a ' with one of the equations....
