At what x do both functions y = 0.3x-3 and y = -0.1x + 5 take positive values?
September 30, 2021 | education
| We have two functions:
y1 = 0.3 * x – 3;
y2 = -0.1 * x + 5;
In order to find at what value of the variable both functions take positive values at the same time, we solve a system of two equations, each of which is based on the condition “the value of the function is a positive number”:
0.3 * x – 3> 0;
-0.1 * x + 5> 0;
0.3 * x> 3;
0.1 * x <5;
x> 10;
x <50.
Find the intersection of solutions to our inequalities and obtain a double inequality:
10 <x <50.
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