3 years ago

4x + y s8 yz - 4x - 1

Mathematics

1 answer:

aleksandrvk [35]3 years ago

8 0

Answer:

the first one the expression is not factorable with ration numbers

the second one is the same thing

Step-by-step explanation:

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Which models show the problem 4

exis [7]

Answer:

the second and last sentences.

Step-by-step explanation:

Its the most reasonable!

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3 years ago

Read 2 more answers

Find a unit vector in the direction of the vector left bracket Start 3 By 1 Matrix 1st Row 1st Column negative 8 2nd Row 1st Col

MrRissso [65]

Answer:

$\left[\begin{array}{c}-\frac{8}{\sqrt{117} } \\\frac{7}{\sqrt{117} }\\\frac{2}{\sqrt{117} }\end{array}\right]$

Step-by-step explanation:

We are required to find a unit vector in the direction of:

$\left[\begin{array}{c}-8\\7\\2\end{array}\right]$

Unit Vector, $\hat{a}=\dfrac{\overrightarrow{a}}{|\overrightarrow{a}|}$

The Modulus of $\overrightarrow{a}$ = $\sqrt{(-8)^2+7^2+(-2)^2}=\sqrt{117}$

Therefore, the unit vector of the matrix is given as:

$\left[\begin{array}{c}-\frac{8}{\sqrt{117} } \\\frac{7}{\sqrt{117} }\\\frac{2}{\sqrt{117} }\end{array}\right]$

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4 years ago

A rectangular card has an area of 120 over 1\4 square inches. The card is 6 over 1\2 inches wide. How long is the card???? if u

Anika [276]

The area is 120/(1/4) or 120 x 4 or 480 square inches
the width is 6/(1/2) or 6 x 2 or 12 inches
to find the length, divide the area by the width
480/12= 40
40 inches
Hope this helps :)

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3 years ago

Brian's math test scores are: 86, 90, 93, 85, 79, 92. What is the mean and median?

IgorLugansk [536]

Answer:

Median: 89

Mean: 87.5

Step-by-step explanation:

86, 90, 93, 85, 79, 92

93, 85

93 + 85

178

178/2

86 + 90 + 93 + 85 + 79 + 92

525

525/6

87.5

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3 years ago

Did I get all of these right? feedback from experts please!

Troyanec [42]

Answer:

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Step-by-step explanation:

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3 years ago