a = amount (in oz) of solution A
b = amount of solution B
The scientist wants a mixture of 110 oz, so
a + b = 110
Solution A consists of 65% salt, so each ounce of solution A contributes 0.65 oz of salt; similarly, each ounce of B contributes 0.9 oz. The mixture is supposed to consist of 75% salt, which amounts to 0.75 * (110 oz) = 82.5 oz of salt. So
0.65 a + 0.9 b = 82.5
Solve for a and b:
b = 110 - a
0.65 a + 0.9 (110 - a) = 82.5
0.65 a + 99 - 0.9 a = 82.5
0.25 a = 16.5
a = 66 ==> b = 44
C. a-3x=0
Equations are like a balance scale. There needs to be an “=“
If 4 are $2.00 , then x3 to get 12 light bulbs and 2x3=6 so it's $6.00
The length is 486
Step-by-step explanation:
638 subtract 152
300*.4=120
300-120=180
there are 120 yellow balls and 180 white balls.
120*.2=24
180*.8=144
sallys team found 168 balls
