4. for each of the following pairs of vectors v1 = (x1, y1) and v2 = (x2, y2) in (a)–(e), carry out the following steps: (i) the lines through v1 and v2 generate a grid (of parallelograms) on the xy-plane. sketch v1, v2, and this grid. (ii) find the area of one of the parallelgrams by computing the determinant of the matrix x1 x2 y1 y2 . is this matrix invertible? (iii) determine whether {v1, v2} is a basis of r 2 .

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Rewrite the following quadratic functions in intercept or factored form. show your work. f(t) = 20t^2 + 14t - 12