How many terms of the series 2 + 5 + 8 + … must be taken if their sum is 155

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

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