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3 years ago

What is the determinant of B? A. −27 B. −30 C. 30 D. –6

Mathematics

2 answers:

Fudgin [204]3 years ago

8 0

Answer:

Step-by-step explanation:

tiny-mole [99]3 years ago

6 0

Answer:

Answer B: -30

Step-by-step explanation:

Let B be as follows:

[-18 3]

[4 1 ]

To find the determinant, multiply diagonally downward from -18 through 1, obtaining -18. We keep this sign as is.

Continue: Start at 4 and move diagonally upward through 3; this product is 12. Because we moved upward, give this result the opposite sign: -12.

Now add together these two products; that is, add together -18 and -12. Here the sum is -30. This is the determinant of the matrix. It's Answer B.

Finding the determinant of a 3x3 matrix obviously requires more steps, but the general approach is similar.

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Question 12 The GPAs of all students enrolled at a large university have an approximately normal distribution with a mean of and

andreev551 [17]

Complete question :

The GPAs of all students enrolled at a large university have an approximately normal distribution with a mean of 3.02 and a standard deviation of .29.Find the probability that the mean GPA of a random sample of 20 students selected from this university is 3.10 or higher.

Answer:

0.10868

Step-by-step explanation:

Given that :

Mean (m) = 3.02

Standard deviation (s) = 0.29

Sample size (n) = 20

Probability of 3.10 GPA or higher

P(x ≥ 3.10)

Applying the relation to obtain the standardized score (Z) :

Z = (x - m) / s /√n

Z = (3.10 - 3.02) / 0.29 / √20

Z = 0.08 / 0.0648459

Z = 1.2336940

p(Z ≥ 1.2336) = 0.10868 ( Z probability calculator)

8 0

3 years ago

a telephone pole casts a shadow that is 29 m long. find the height of the telephone pole if a statue that is 38cm tall casts a s

mafiozo [28]

You do cross multiplication so multiply 29 by 38 and then divide it by 78 which gives you answer of 14.128 cm

6 0

3 years ago

Erica is training for a marathon This week she ran 6 less than 2 times the number of miles that she ran last week in these two w

Furkat [3]

Answer:

I think it's not my level ques. !!

sowy >.<

7 0

2 years ago

Could use the help! thanks again!

love history [14]

Answer:

Beth is incorrect.

It is a translate to the right 5 units and up 1 unit.

When we solve x-5=0 we get x=5, not x=-5 which says we go right 5 units.

When we plug in 5 into the expression for g, we get 1 which means go up 1 as well.

Step-by-step explanation:

So $g(x)=\sqrt{x-5}+1$ is actually a translated 5 units and up 1 unit. Why?

Let's take there point (0,0) and figure out what the new point is on the translated graph.

We need to figure out when the inside of our square root for g is 0. This is where the graph of g will start at and continue on.

x-5=0 when x=5 ( I added 5 on both sides).

So let's plug in 5 to see what the new point is.

$g(5)=\sqrt{5-5}+1$

$g(5)=\sqrt{0}+1$

$g(5)=0+1$

$g(5)=1$

So the new graph, g, starts at the point (5,1).

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3 years ago

Isosceles trapezoid ABCD has legs AB and CD, and base BC If.AB = 6 -7, BC = 2y - 4, and CD=7y - 20 find

Elenna [48]

Answer:

y = 13

Step-by-step explanation:

y = 13

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3 years ago