How many license plates can be made using 2 digits then 5 letters if repeated digits and letters are not allowed?

What is the y intercept of f(x)=(1/2)^x?

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.