How did cell phones change communications in the early 1990s?

Solve 8+3 (2x+7) - 5x+10

3^x grows faster than x^3. Explain why.

Which variable expression represents the word phrase? the sum of 10 and the product of 7 and a number A. 10-7y B. 10y + 7 C. 10 + 7y D. 10 + (y : 7)

The remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after 35 minutes of calls is $15.10, and the remaining credit after 73 minutes of calls is $9.78.

What is the solution set of the given equation? 4y - 6y + 9y = - 2 {-2/11} {2/7} {2/11} {-2/7}

What is the domain of f (x) = cos (x) ?

Mike and Kim invest $14,000 in equipment to print yearbooks for schools. Each yearbook costs $7 to print and sells for $35. How many yearbooks must they sell before their business breaks even?

What is the solution to the system of equations? Use the substitution method. j + k = 3 j - k = 7 A. The solution is (8, 1) B. The solution is (5, - 2) C. There is no solution. D. There are an infinite number of solutions.

30% of what number is 10.2

Long division 19 divide 23.94