7 (2a+5b-3) what is the answer to this problem

8 in scientific notation?

A shearer sheared 80 sheep in 2 hours. a - express this as a rate in sheep per hour. b - if the shearer continues at the same rate for 5 hours, how many sheep have been shorn? c - how many sheep can be shorn in an 8 hour day?

if oliver has 7 toys and gets 1 new toy every month and Maxwell has no toys and will get 3 new toys each moth when will oliver and Maxwell have the same number of toys?

Does sin (-30) equal - sin (30) ?

Amelia plans to open a compound interest savings account with a $22,000 deposit at a bank with an annual interest rate of 5.25%.

Revenue in 2000 for a bakery chain totaled $10 billion from 5,562 shops nationwide. During the next 10 years, the bakery had to close down a few shops, and the total revenue in 2010 from 5,152 shops was $6.7 billion.

A bag contains 2 red marbles 7 blue marbles 5 green marbles. If two marbles are drawn out of the bag, what is the exact probability that both marbles will be blue

6x4.3. Using distributive property. make sure to explain.

Round 12,000 thousand feet to the nearest thousand

The greatest common factor of 15u2v3, 20u5v2, and 45u3v5 is