Answer:
5
Step-by-step explanation:
Answer:
B, 21
Step-by-step explanation:
78 minus 57 is 21, thus B is the correct choice
Das is 20 points per user, just fyi
1. distributive property
recall that a(b+c)=ab+ac
5(3x-4)=5(3x)+5(-4)=15x-20
2. bruh, I can't show that here, wait, nvm, see attachment

3.
100% is double the price
45*2=90
the item will sell for $90 in store
4.
1/2+1/4+1/8=
4/8+2/8+1/8=
7/8
7/8 piazza was eaten
5. see attachment
it ends at 15
14 x 12= 168. (she already filled 3 cartons. so, 17-3 =14.) she needs 168 eggs to fill the other 14 cartons.
This is the concept of arithmetic; given that a string was cut into 3 equal pieces.
The length of each piece will be:
[length of the string]*3
length of the string=2 1/4 ft=9/4 ft
thus the length will be:
9/4÷3
=9/4×1/3
=3/4 ft
thus we conclude that the length of each string will be 3/4 ft long