Someone me with this word !

the local bike shop ordered 19 wheels, and the shop owner wanted to make seven bicycles and/or tricycles from them. how many of each must he make to use up all of the wheels?

the instructions say the total bike/tricycles has to equal 7, but i keep getting 9 all someone !

5 tricycles, 2 bicycles

Step-by-step explanation:

5•3=15 2•2=4 15+4=19

always start with the largest group and try it out, if it doesn't work, subtract one from the largest group and try again.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%