when 21 is subtracted from the square of a number, the result is 4 times the number. find the negative solution

The diagram show a rectangle 0.5cm and 7cm

The function below represents the monthly charges for a cell phone where x is the number of minutes used. y = 0.05x + 25 What would be the amount of the bill if the phone is not used during the month? A. 0.05 B. 0.00 C. 25.05 D. 25.00

Solve the equation 4c2 + 7c - 5 = 0 using the quadratic formfoula

Probability question! A recent survey reported that 60% of the students at a high school are girls and 65% of girls at this High School play a sport.

F (x) = -3x2+2x-5 what is f (-1) ?

A family went to a baseball game. They parked the car in a parking lot which charged $20. The cost per ticket was $28. Write an equation for the total cost of going to the baseball game, where y is the total cost and x is the total number of people.

Show me how to work the equation for 6*+20=-4

the total cost of a pair of shoes is $85.86. What was the cost of the shoes before the 8% sales tax was added?

The sum of two numbers is fifteen. One number is three less than the other. Find the numbers.

Which values for x and y make the statement, (x+4) (y-1) = 0, true? A) x = - 4, y = 1 B) x = - 4, y = - 1 C) x = 4, y = 1 D) x = 4, y = - 1