Asystem of linear equations could have an infinite number of solutions?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

Write the equations in logarithmic form 10^3=1,000