Which number is the best approximation for 4√5−2√3 ?

a. 0.5

b. 5.4

c. 6.9

d. 12.2

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price

Solve the following: 12(x^2–x–1)+13(x^2–x–1)=25(x^2–x–1) 364x–64x=300x