Express the series using sigma notation 5 - 10 + 20 - 40 + 80 - ...

Nadia bought 5 tickets to attend a spaghetti super fundraiser at her. school. The equation 5x equals 32.50 can be used to find x, the cost of each ticket in dollars. Which equation represents the cost of each ticket. A: x equals 32.

In a recent year 17.3% of all registered doctors were female. If there were 52,900 female registered doctors that year, what was the total number of registered doctors? Round to the nearest whole number

Wednesday's temperature was 30° cooler than Monday's temperature, t. Write an expression for Wednesday's temperature.

Y = - (1/2) x (x+6) find the vertex and the axis of symmetry

Dogs outnumber cats in an area by a ratio of 9 to 8. There are 180 dogs in the area. How many cats are there?

Explain the difference between 4 times the sum of x and y and the sum of 4 times x and u

Assume that 140 surveys are completed. Of those surveyed, 71 responded positively to effectiveness, 60 responded positively to side effects, and 65 responded positively to cost.

For the first 4 years of a pig's life, the weight w (in kilograms) of the pig approximately fits the formula w (t) = 2 + 14t, where t is the age of the pig in years.

What is the quotient of b/6a and ab/18?

In math, how to find x?