Why is 4 + (-3) equal to 1?

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

What are the solutions to the equation 4x2+3x=24-x

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?