Lara has four packages of baseball cards. the first package has seventeen cards. the second package has twenty-one cards. the third package has twenty-two cards, and the fourth package has sixteen cards. using front end estimation what is the best estimate for the total number of baseball cards she has?

a.

90

b.

80

c.

70

d.

60

80

Step-by-step explanation:

Rounding off each group of cards with ±10 precision we get 20 for all.[Rounding off with this precision because of options provided in that manner]

Thus four deck have fronted estimation of 4×20=80.

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer