Can someone explain square

Roots? Because i honesty just don't get it.

Solve this expression 4i-√-100

Jim has $700 in savings at the beginning of Summer he wants to have at least $300 in savings when he goes to buy back to school clothes he withdraws $25 per week for spending money how many weekends can he withdraw his amount and still have the

Serena ordered 27 pizzas for a party. the total bill came to 351. how much did each pizza cost

Eva and Liam are reading a novel in their English class. Liam has read 17 less pages than Eva has. If they read 265 pages combined, how many pages has Liam read

Solve D = RT for D, if T = 5 hours and R = 65

If f (x) = x+4 and g (x) = 2x-3, find (g-f) (2)

Put these numbers in order, smallest to largest 4.9 9.44 9.4 4.09 4.99

How many people are between 159 cm and 179 cm

What fraction is equivalent to 5.1? is 5.1 a rational number?

Natalie has a choice of three breads, five choices of meats, and four choices of cheese to make a sandwich. how many different sandwiches can she make?