Answer:
$3
Step-by-step explanation:
Let the cost of a book and a pen be $b and $p respectively.
3b +2p= 8 -----(1)
5b +3p= 13 -----(2)
(1) ×3:
9b +6p= 24 -----(3)
(2) ×2:
10b +6p= 26 -----(4)
(4) -(3):
10b +6p -(9b +6p)= 26 -24
Expand:
10b +6p -9b -6p= 2
b= 2
Substitute b= 2 into (1):
3(2) +2p=8
6 +2p= 8
2p= 8 -6
2p= 2
p= 2 ÷2
p= 1
Total cost of one book and one pen
= $b +$p
= $2 +$1
= $3
Answer: b
Step-by-step explanation:
Answer:Many bodybuilders and fitness enthusiasts try to do more than 300 pushups a day. For an average man, doing 50 to 100 pushups should be enough to maintain a good upper body.Ma
Step-by-step explanation:
Answer:
123.45 + 67.891 = 191.341
Step-by-step explanation:
I don't know really know how to explain but I'll try to. So since 123.45 is the larger decimal so you put it first then below it you put 67.891.(not that it is necessary)
Then add a zero to 124.45. Meaning it will be 123.450. (It is the same number, we just have to add a zero there.)
Add then just add like you normally do. Just try doing it and you'll see.
188 is your answer XD 4x47=188