Step-by-step explanation:
let the number of cookies sold on first week be=x
let the number of cookies sold on second week be= x+4
let the number of cookies sold on third week be= (x+4)×2
total number of cookies sold = 351
now 351=(x)+(x+4)+(x+4)×2
351=3x+(4+4×2)
351=3x+12
3x=351-12
3x=339
x=339÷3
x=11
Cookies sold on first week=113
Cookies sold on second week= 113+4= 117
Cookies sold on third week =113+4×2 = 113+8=121
now add all the number of cookies solved for confirmation
=113+ 117+ 121= 351
Answer: -9
Step-by-step explanation:
(2-8) times (-3-9) divided by -8
(-6 times -12) divided by -8
72 divided by -8
-9
Answer:
The third option
Step-by-step explanation:
Answer:
Step-by-step explanation:
When you are changing a repeating decimal to a fraction, there is a trick you have to know. 2 actually. Put the decimal right before the repeating starts and right after the repeating starts. This one is a bit tricky since the decimal is after a 1, and 1 is what is repeating. So let's leave that one as is and simply say that
x = -1.11111
Now let's move the decimal right after the second one. To do that you have to multiply by 10. So we then can say that
10x = -11.11111
For this problem, we will disregard the negative til the end because it just makes things confusing.
Subtract the smaller equation from the larger:
10x = 11.111111
- 1x = 1.111111
and get
9x = 10
Divide both sides by 9 to get 10/9 which is 1 1/9 as a mixed fraction. Let's check it first to see if we're correct, then we'll throw the negative sign back on.
10/9 on your calculator gives you 1.111111111 repeating, so now that we know we are correct, the mixed fraction is
-1 1/9
<span>500 = 0.5 kw
0.5 * 8 * 7.5 = 30c</span>