Hello so i'm so confused!

Fill in the missing numbers in the calucations below:

It might be the website, but I'm to confused

263 + ___ = 1011

405 + ___ = 653

How can the common difference between 375-315=30

All properties that squares and rectangles have in common?

Write using exponents. Work from left to right on the grid. 7*7*7*7

Can a pair of obtuse angles also be vericle angles

Steve Ashley and Jeremy work at the same restaurant Steve works every 4 days Ashley works every 6 days in Jeremy works every 3 days if they are all working to day in how many days will they work together again

The measurement of the supplement of an angle is 39 degrees more than half the angle find the measurement of the angle

Domain and range -3x2 + 6x+1

The probably that a new car of a particular make will have a problem with the fueline is given in the table Car Make Problem with Fuel Line 0.008496 0.00815 Total 1000809

Jacob surveyed members of three different gyms and recorded the number of hours they exercised last week. The mean and standard deviation (SD). of the data he gathered, is shown in the table. Gym A Mean = 7 SD = 2.9 Gym B Mean = 8 SD = 4.

Michael has a drawer with 8 pairs of black socks and 12 pairs of white socks. Without looking he takes a white piece of socks out of the drawer. What is the probability that the next pair he takes out is black?