Answer:
69,300 ways
Step-by-step explanation:
mathematics texts, = 2
Physics texts = 3
Computer science tests = 4
Psychology texts = 2
The total number of books
= 2+3+4+2
= 11
Next we have to calculate the number of ways that these books can be placed back on this shelf.
11!/2!3!4!2!
11! = 39916800
2! = 2
3! = 6
4! = 24
2! = 2
39916800/2*6*24*2
= 39916800/576
= 69300 ways
He can replace the texts in 69300 ways.
Answer:
0.45
Step-by-step explanation:
3÷3=1
1.35÷3=0.45
Answer:
She should use the variance and standard deviation
Step-by-step explanation:
In order to make her results statistically significant, the student has to use statistical methods to check the results. In this way, the student will be able to determine whether there is a clear correlation between her results. In addition, using the standard deviation would be a useful tool to check whether her data will not be very much scattered throughout the distribution. By using the standard deviation, she will be able to see how far her data moves away from the mean or average.
Answer:
A. True
explanation:
Inequalities that use ≤ or ≥ symbols are plotted with a solid line.
Answer:
If the bisectors of two adjacent angles are perpendicular to each other, are the angles then supplementary angles?
Suppose two angles ABC and CBD are x and y.
x+y = 180 deg.
The bisector of angle ABC (BE) and the bisector of angle CBD (CF) will form angle EBF = (x/2)+(y/2) = 180/2 = 90 deg.
Conclusion: If the angle bisectors of two adjacent angles are perpendicular to eaxh other, the adjacent angles are supplementary angle
Adjacent angles are when the 2 angles have a common vertex and a common arm.
if the exterior sides of 2 adjacent angles are perpendicular, then the angles are complementary angles.
Then the sum of the 2 adjacent angles is a right angle - 90°.
When 2 angles add up to 90°, they are called a pair of complementary angles.
Step-by-step explanation: