△ABC and △DEF are similar triangles. Triangle A B C has side lengths A B equals 12, B C not given, and C A equals x plus 7. Triangle D E F has side lengths D E equals x minus 4, E F equals x, and F D equals 5. Find BC. Hint: Solve for x first. There is another step after solving for x.

What is the missing constant term in the perfect square that starts with x^2 -20x

The probability that you roll a two on a six-sided die is 1 6 16 . if you roll the die 60 times, how many twos can you expect to roll

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?