Is 12x + 3y = 6 linear

Can someone explain to me how to do these, I dont get it. A hair stylist worked from 8:45 A. M. until 12:15 P. M. and 12:45 P. M. until 5:15 P. M. Estimate the total number of hours worked. 8 hr 7 hr 15 min 8 hr 15 min 7 hr 30 min

Graph - y + 1 = 0 by finding the x and y intercepts

Ryan runs 100 m two times. His times were 14.19 s and 13.78 s. Daniel runs 100 m two times. His times were 15.77 s and 16.24 s. How much greater was Daniel's total time than Ryan's total time? Enter your answer in the box.

If you offered an item of $17.85 if the seller states he normally sells the same item of $19.95 what percentage discount is he offering you

9.1 dividing by 3576

What Exponential form is 1 / 10 x 10 x 10 x 10? :

Is 6 (x+0.4) equivalent to 3 (2x+0.8) ? YES or NO? Show your work! 6 (x+0.4) 3 (2x+0.8)

When is a rhombus a square? A. When its angles are convex angles B. When its angles are right angles C. When its sides are parallel D. When its sides are congruent

Do the ratios 3/4 and 4/8 from a proportion

Find the product. (y-3) (y-4) =