Step-by-step explanation:
[1/2]^-2= 4
[1/3]^-2=9
[1/4]^-2=16
So sum is 4+9+16=29
Hope this helps you.
9514 1404 393
Answer:
$3.36
Step-by-step explanation:
On each pencil, the profit was ...
pencil profit = pencil price - pencil cost
pencil profit = $0.22 -0.15 = $0.07
The number of pencils sold was ...
(4 dz)(12 pencils/dz) = 48 pencils
Then the total profit was ...
(48 pencils)($0.07 /pencil) = $3.36
The store made a profit of $3.36 from pencils.
Answer:
42 = <em>l</em>
21 = <em>w</em>
Step-by-step explanation:
{l = 2<em>w</em>
{126 = 2<em>w</em> + 2<em>l</em>
126 = 2<em>w</em> + 2[2<em>w</em>]
126 = 2<em>w</em> + 4<em>w</em>
126 = 6<em>w</em>
21 = w [Plug this back into both equations to get the length of 42]; 42 = <em>l</em>
I am joyous to assist you anytime.
I'm pretty positive that the answer is 500. just use your powers of 10 and you'll find it easy. don't think about it too hard! i really hope that helps!!! :)
1hr 30 mins= 60mins+30mins=90mins
140$=90mins
In one minute, they make 140/90=14/9
in 9 hours=9*60mins=540mins
540*14/9=840
therefore,they make 840$ in 9 hours
