If radio takes 6 batteries but store only sales in packs of 10, how many packs do you have to buy to not have any left over

You would have to buy 3 packs of the batteries so then you could have 30 batteries 6 * 5 equals 30 and 3 times 10 equals 30 so with the GCF of 30 between 10 and 6 that would give you 5 times to use all the batteries before you have to go to the store to buy more I hope this help

This polygon has 4 sides
180(4-2) = 180(2) = 360 degree
80+90+2x + 3x = 360
170+5x = 360
5x = 190
x= 38
measure of angle t is 2(38)= 76
the answer is c. trust me
hope this !