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2 years ago

How many elements are in a 9 x 3 matrix?

Mathematics

1 answer:

Fantom [35]2 years ago

5 0

9x3 matrix has 9 rows and 3 columns, so it has 27 elements

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Help find the answer to what B is.

satela [25.4K]

Assuming that this is a right triangle, then (50 in)^2 = b^2 + (14 in)^2, according to the Pythagorean Theorem.

Then 196 in^2 + b^2 = 2500 in^2. Solving for b^2:

b^2 = (2500-196) in^2, and so b = +48 inches (answer)

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3 years ago

If 400 reduced by two times my present age is 296, how old am I now?

vitfil [10]

Answer:

52 years.

Step-by-step explanation:

Represent my current age by c. Then 400 - 2c = 296, or

104 = 2c

Then c must be 104/2, or 52 years.

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3 years ago

Which ordered pair is a solution of the equation?<br> 7x-2y=-57x

stepladder [879]

Answer:

D Neither

Step-by-step explanation:

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Hope it helps you in your learning process.

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3 years ago

Write a definite integral that represents the area of the region. (Do not evaluate the integral.)

joja [24]

Answer:

$\int_{-1}^{1}7(x^{3}-x)\:dx$

Step-by-step explanation:

1) The other curve is $y=0$ then the common points of both curves are x-intercepts, the roots of $y=7(x^{3}-x)$

$y=7(x^{3}-x)\Rightarrow 7(x^3-x)=0 \Rightarrow 7(x^{3}-x)=7x(x-1)(x-1)\Rightarrow \\S=\left ( 0,0 \right ),\left ( -1,0 \right ),\left ( 1,0 \right )$

2). Then those intersection points are the upper and the lower limits. Plugging in to this formula for they belong to the interval [-1,1]:

$\int_{a}^{b}|f(x)-g(x)dx$

$\int_{a}^{b}|f(x)-g(x)dx \Rightarrow \int_{-1}^{1}|7(x^{3}-x)-0|dx \Rightarrow \int_{-1}^{1}7(x^{3}-x)\:dx$

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3 years ago

What the answer is to question number 4

cestrela7 [59]

Hey there!
The answer is D. 1/5
An explanation is in the attached image below.
Hope this helps!

3 0

3 years ago

How many elements are in a 9 x 3 matrix?​

How many elements are in a 9 x 3 matrix?