Answer:
Acute.
Step-by-step explanation:
An angle of measure between 0 and 90 degrees is an acute angle.
The slope is 4/3
Explanation:
To find slope you use the slope formula, which is rise/run, and shown in the picture attached.
So when you use your coordinates you will get: 20 - 8
---------- Which gives you 12/9,
15 - 6 and then when you
simplify that you get 4/3
Answer:
375 is the answer
Step-by-step explanation:
Step-by-step explanation:
-3x+2y=-10
-2(-2x+y=-6)
-3x+2y=-10
4x-2y=12
-3x=-10
4x=12
x=2
Answer:
Option C is right
Step-by-step explanation:
Given are two samples
I group has sample size 90, mean = 9.2 and std dev =0,.37
II group has sample size 70, mean = 7.3 and std dev = 0.58
we find that mean difference i.e. difference between mean hours of sleep between two groups
= 9.2-7.3 = 1.9
Std error for difference = 0.0620
Since sample size is sufficiently large we can use Z critical for 99%
i.e. 2.58
Margin of error =±2.58(0.062)
=0.16
Hence confidence interval 99% for difference in hours of sleep
= (1.9-0.16,1.9+0.16)
=(1.74, 2.06)