The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). the remaining credit after 33 minutes of calls is $26.04, and the remaining credit after 61 minutes of calls is $22.68. what is the remaining credit after 78 minutes of calls? calling time (in minutes)remaining credit (in dollars)

the answer is 844

step-by-step explanation:

it is 844 because if you add 836.50 + 7.5 you will get 844

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag