what is the value of y in the equation 5x + 2y = 20, when x = 0.3?\n2.5\n2.8\n9.25\n10.75

Explanation:

Step1: Substitute x value

Substitute $x = 0.3$ into $5x+2y = 20$. We get $5\times0.3+2y=20$.

Step2: Simplify the left - hand side

Calculate $5\times0.3 = 1.5$. The equation becomes $1.5 + 2y=20$.

Step3: Isolate the term with y

Subtract 1.5 from both sides: $2y=20 - 1.5$. So $2y=18.5$.

Step4: Solve for y

Divide both sides by 2: $y=\frac{18.5}{2}=9.25$.

Answer:

9.25