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pochemuha
2 years ago
13

What is the angle between a=7i+3j and b=4i-j​

Mathematics
1 answer:
PolarNik [594]2 years ago
5 0

a\cdot b=(7)(4)+(3)(-1)=25\\\\|a|=\sqrt{7^{2}+3^{2}}=\sqrt{58}\\\\|b|=\sqrt{4^{2}+(-1)^{2}}=\sqrt{17}\\\\\cos \theta=\frac{25}{\sqrt{58}\sqrt{17}}\\\\\theta=\cos^{-1} \left(\frac{25}{\sqrt{58}\sqrt{17}} \right) \approx 37.235^{\circ}

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Evaluate The quantity of x cubed plus 3x squared minus 2x plus 7 divided by the quantity of x minus 2 end quantity period.
Minchanka [31]

The value of x^3 + 3x^2 - 2x + 7 divided by x- 2 is (x^2 + 5x + 8) + 23/(x - 2)

<h3>What is a quotient?</h3>

Quotients involve the result of dividing a dividend by a divisor.

In other words, quotient means division or the result of a division operation

<h3>How to solve the quotient?</h3>

The quotient expression is given as:

(x^3 + 3x^2 - 2x + 7)/x- 2

Expand the numerator in the above expression

(x^3 + 5x^2 - 2x^2 + 8x - 10x - 16 + 23)/(x - 2)

Rearrange the terms of the numerator in the above expression

(x^3 + 5x^2 + 8x - 2x^2 - 10x - 16 + 23)/(x- 2)

Factorize the numerator in the above expression

[x(x^2 + 5x + 8) - 2(x^2 + 5x + 8) + 23]/(x - 2)


Factor out x^2 + 5x + 8

[(x -2)(x^2 + 5x + 8) + 23]/(x - 2)

Split the fractions

(x -2)(x^2 + 5x + 8)/(x - 2) + 23/(x - 2)

Divide the common factors

(x^2 + 5x + 8) + 23/(x - 2)

Hence, the value of x^3 + 3x^2 - 2x + 7 divided by x- 2 is (x^2 + 5x + 8) + 23/(x - 2)

Read more about quotients at:

brainly.com/question/8952483

#SPJ1

<u>Complete question</u>

Evaluate (x^3 + 3x^2 - 2x + 7)/x- 2

5 0
2 years ago
Please help me on number 4. I don’t really get the question :(
PtichkaEL [24]
Do 100÷8, then whatever the answer is multiply it by 8 and ta da
3 0
3 years ago
Read 2 more answers
Pat’s Potato Farm grew 490 pounds of potatoes. Pat delivered 3/7 of the potatoes to a vegetable stand. The owner of the vegetabl
madam [21]

Answer:

14

Step-by-step explanation:

I first multiplied 490 by 3/7

giving me 1470/7

I divide 1470 by 7 giving me 210

As I got 210

I multiplied 210 with 2 and got 410/3

I divided 410 by 3, getting 140.

It then said half of what was delivered was put into 5 pound bags, so

140× 1/2 or 140÷2 is 70

70 divided by 5 is 14

They made 14 5-pound bags.

3 0
3 years ago
What is the LCD of 5 and 10?
vazorg [7]

Answer:

5

Step-by-step explanation:

hope i helped :) !!! brainliest please ?

6 0
3 years ago
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One tray holds eight sandwiches if there are 30 sandwiches in all, how many trays are needed?
nika2105 [10]
30/8=3.75
So, you need 4 trays, since you can't have 75% of a tray.
Hope this helps
3 0
3 years ago
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