Can standard deviation be negative

A rectangle has a length of 5 yards and a width of 3 yards. what is It's perimeter?

A college student realized that he was spending too much money on music. For the remaining 5 months of the year his goal is to spend a mean of $60 a month towards music.

How do you show 2+3i is a root of x^2-4x+13

Mira has $760 in her bank account and withdraws $40 each month. Paulina has $210 in her bank account and deposits $70 each month. In how many months will Mira and Paulina have equal amounts of money in their accounts?

Find three consecutive integers whose sum is - 78

Where is the x-axis on a typical x-y grid?

Bryce drove 200 miles to his grandparents house this is 50 miles more than three times the distance to Aunt Lance a house what is the distance to hisaunt lance house?

Seven times a certain number is 266. What is the number?

Write a variable expression that represents how much you will be paid if you work x hours at your selected rate. So, can you write an expression for Hourly rate: 35.00

Given the equation f (x) = 2x² + 4x - 1, what is axis of symmetry? a. 1 c. - 1 b. 2 d. 0