He invested "a" at 3% and "b" at 5%
now, he invested 100 more in "b", so, whatever "a" may be, b = a + 100
now, how much is the interest yield of each? well
how much is 3% of a? well, (3/100) * a, or 0.03a
and 5% of b? well (5/100) * b, or 0.05b
now, we know the total yield was 53 bucks, thus 0.03a + 0.05b = 53
thus

solve for "a", to see how much was invested at 3%
what about "b"? well, b = a + 100
Answer:
The slopes of the line are most likely the same because they are parallel lines. Parallel lines always have the same slope as eachother.
Step-by-step explanation:
Hey Child.
The answer to this is 1 or 7:
To find the range for the number of measures played to satisfy our solution, we must solve for x using s = 80.
Next, we subtract 50 from both sides of the equation.
Next, we divide both sides of the equation by 10
Next, to eliminate the absolute value bars, we will add a ± sign in front of our s value, 3.
Finally, we add 4 to both sides of our equation giving us 4 ± 3 = x
Separating this into two equations, we get 4 - 3 = x and 4 + 3 = x
Therefore, x, the number of measures of music played, must be either 1 or 7.
Hope It Helped!~
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