Answer:
-8
Step-by-step explanation:
First, simplifying a little, we can subtract 5 from both sides to get rid of the +5 on the left side:
-5⁄2 a + 5 = 25 -> -5/2 a = 20
Now, getting rid of the fraction, let's multiply both sides by 2:
-5/2 a = 20 -> -5a = 40
Finally, dividing both sides by -5 will isolate a, giving us the answer:
-5a = 40 -> a = -8
Edit: thanks for correction, sorry about that
Answer:
d. 0.80
Step-by-step explanation:
The given regression equation is
y=0.6x+188
Here, slope=b=0.6
xbar=420, sx=80, ybar=440 and sy=60.
As we know that when y=a+bx, the slope is
b=r(sy/sx)
From this equation we can find correlation coefficient r
b*sx=r*sy
bsx/sy=r
r=0.6*80/60=48/60=0.80.
Hence the correlation coefficient r=0.8.
Good morning ☕️
Answer:
<h2>6 760 000</h2>
Step-by-step explanation:
1. we have 26 choices for each letter then 26² choices for choosing two letters
2. the same with digits, 10³ choices for choosing three digits
3. for order between letters and digits we have 5C2 choices
4. finally, 5C2×26^2×10^(3) = 6 760 000 possible different passwords
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The value of b should be one
Answer:
A- mercury and helium
b- 1034.86
Step-by-step explanation:
