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balu736 [363]
3 years ago
7

Pleaseeee help asap i don’t wanna go to summer school!!

Mathematics
1 answer:
Levart [38]3 years ago
3 0
The answer to your question is option a

Mean means the average so you plus all the scores and divide that by the number of scores and when to undo that, the answer you get is a



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E and F are mutually exclusive events. P(E)=0.3; P(F) =0.2. Find P(E | F)
Arada [10]

Answer:

0

Step-by-step explanation:

P(E|F) = P(E and F)/P(F) = 0/0.2

Events that are mutually exclusive exclude each other.  That means if one

occurs, the other is excluded.  That means if one occurs, the other cannot

occur.

So that tells us that the probability of them both happening is impossible,

which mean P(E and F) = 0

6 0
4 years ago
. Evaluate each expression given that X = -2, Y = 8 and Z = 4
Liula [17]
Hello:-
this(*)is counted as multiplication
1. 4*2 + (-2+8)
=8+(6)
=14
2. (-2)*2 + 4
= -4+4
=0
3. 8*4/-2
= -32/2 (as -ve sign cannot be in denominator)
= -16
4. -2*4/8
= -8/8
= -1
5. -2*8/4
= -16/4
= -4
therefore it is a. -4
I hope it will help u !!!!!!!!!
8 0
3 years ago
The mean of a data is 52.4 and the standard deviation is 11.8.What percent of the data is between 40.6 and 64.2?
storchak [24]

Answer:

B. 68%

Step-by-step explanation:

Any number within 1 positive or negative deviation of the mean represents 68% of normally distributed data.

Math explanation:

52.4+11.8=64.2

52.4-11.8=40.6

5 0
4 years ago
Read 2 more answers
Which of the list of letters all have line symmetry?
ss7ja [257]

Answer:

Option A

A B C D

Step-by-step explanation:

Line of symmetry means that line which cut anything into two two halves.

It could horizontal, vertical and diagonal.

A - vertical line of symmetry

B - horizontal line of symmetry

C - horizontal line of symmetry

D - horizontal line of symmetry

And it is an example of Spherical symmetry:

If the organism is cut through its centre, the resulting parts look the same.

7 0
4 years ago
Solve the following system of equations graphically on the set of axes below.<br> y=x+8<br> y=−2x−1
love history [14]
This makes sense because every point on the gold line is a solution to the equation
y
=
1
2
x
+
3
y=
2
1
​
x+3start color #e07d10, y, equals, start fraction, 1, divided by, 2, end fraction, x, plus, 3, end color #e07d10, and every point on the green line is a solution to
y
=
x
+
1
y=x+1start color #0d923f, y, equals, x, plus, 1, end color. So, the only point that's a solution to both equations is the point of intersection

6 0
3 years ago
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