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3 years ago

State the dimensions of the matrix. identify the indicated element

Mathematics

1 answer:

aniked [119]3 years ago

8 0

Answer:

D; 2 * 3; -4

Step-by-step explanation:

The dimension of the matrix refers to the number of elements in a row multiplied by the number of elements is a column

In a row, we have 2 elements, in a column , we have 3 elements

So the matrix is of 2 * 3 dimension

a21, refers to the element in the matrix that is in the row 2 column 1 and that is -4

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kayla works at a coffee shop, and yesterday she earned $6.25 an hour plus $8.50 in tips. Let x represent the number of hours wor

Marta_Voda [28]

Answer:

Step-by-step explanation:

Step one:

Given data

amount of money earned per hour= $6.25

amount of money made in tips= $8.5

if x represents the number of hours worked and

y represents the total amount earned

The linear function for the total is expressed as

y=mx+c

Step two:

Hence for the situation given the expression for the total is

y=6.25x+8.5

Say Kayla worked for 2 hours

that is x=2, the total she would have earned is

y=6.25(2)+8.5

y=12.5+8.5

y=21

For a 2 hour work, Kayla will make $21

7 0

3 years ago

(21x-3)+21=23x+6 solve

klemol [59]

Answer:

False

Step-by-step explanation:

You Cnat solve it

5 0

3 years ago

Read 2 more answers

-9x+5<17 AND 13x+25<-1

fgiga [73]

Answer:

x < -3 1/2 or 3.5

Step-by-step explanation:

-9x + 5 < 17

13x +25 < -1

If we add the 2 equations together, we will have

4x + 30 < 16

4x < 16 - 30

4x < -14

Divide both sides by 4

x< -14/4

x < -3 1/2 or 3.5

4 0

4 years ago

g The proportion of U.S. births that result in a birth defect is approximately 1/33 according to the Centers for Disease Control

Rudiy27

Answer:

0.1426 = 14.26% probability that at least one of the births results in a defect.

Step-by-step explanation:

For each birth, there are only two possible outcomes. Either it results in a defect, or it does not. The probability that a birth results in a defect is independent of any other birth. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

The proportion of U.S. births that result in a birth defect is approximately 1/33 according to the Centers for Disease Control and Prevention (CDC).

This means that $p = \frac{1}{33}$