Answer: Maybe it is x+8x+12 meters
Step-by-step explanation:
Answer:
The answer is 64.
Step-by-step explanation:
Lets say the top row is <em>x</em> and the bottom row is <em>y</em>.
Since when <em>x</em> is 13 <em>y</em> is 104 and when <em>x</em> is 14 <em>y</em> is 112 that means the <em>y </em>value goes up by 8 every time.
when x=3: 16+8=24
when x=4: 24+8=32
when x=5: 32+8=40
when x=6: 40+8=48
when x=7: 48+8=56
when x=8: 56+8=64
Hope this helps you!!!!
Answer:
42
Step-by-step explanation:
SST = ∑
(
y
−
¯
y
)
² (¯
y = mean of y values)
¯
y = (5+8+14)/3 = 27/3 = 9
∑
(
y
−
¯
y
)
² = (
5
−
9
)
² + (
8
−
9
)
² + (
14
−9
)
²
= ( −
4
)
² + ( −
1
)
² + (
5
)
²
= 16 + 1 + 25
= 42
Answer:
It's value is less than 0
Step-by-step explanation:
Okay, so the rate is 1 job / hours, so:
1/3 + 1/7 (This covers both their work rates) = 1/n (n represents the time it take for them to work together)
Get the LCD:
7/21+ 3/21 = 1/n
10/21 = 1/n
Cross multiply:
10n = 21
n = 2.1
It will take them 2.1 hours, or 2 hours and 6 minutes
