How many 4 - letter words can be formed using the letters a, b, c, d, e and f, if

a) the word must start with a vowel? (cannot be repeated)

b) the word should start and end with a consonant?

Your family went out to dinner at Applebee's and left the waiter an 18% tip. If the total before the tip for the dinner was $47.98 what should be paid to the waitress as a tip

Choose the more precise measurement 6.5qt or 6.54qt

G find the solution to the linear system of differential equations {x′y′==10x+4y-12x-4y satisfying the initial conditions x (0) = 9 and y (0) = - 15.

What is the solution for t3=30

An automaker of new cars recommends an oil change after the first 5000 miles and every 3000 miles thereafter. If you plan to drive the car 250 miles a week, how many oil changes will you need the first year?

How many years from 1848-2015

What is 66.875 as a mixed number in simplest form.?

Show tow ways to evaluate a (b-c) for a=4, b=5, and c=3

Each type of fish thrives in a specific range of temperatures. The optimum temperatures for sharks range from 18 degrees Celsius to 22 degrees Celsius. Write an inequality that represents the temperatures where sharks will NOT thrive.

If angle 1 is 110°, what would the other angle measures have to be in order for m || n and allp? Angle 2 = Angle 3 = Angle 4 =