Seventeen more than five times a number is negative twenty-three. what is the number or in this case, the variable solution?

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers