Find the value of a and b if 1/5+√7= a+b√7​

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15

Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?