What is the equation in slope-intercept form of the line that has a slope of -3 and passes through the point (0,5)

Can someone me do math because i am having a breakdown rn because i don’t get it

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.