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3 years ago

Expand & simplify (x - 2)(x+4)(0-6)

Mathematics

2 answers:

jek_recluse [69]3 years ago

5 0

Answer:

(x^2 +4x)+(-2x -8)+(-6)=x^2 +2x -14

Step-by-step explanation:

Hope this helped have an amazing day!

trasher [3.6K]3 years ago

3 0

Answer:

(x^2 +4x)+(-2x -8)+(-6)=x^2 +2x -14

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You have just bought a new television and it has an aspect ratio of 16:9. The screen on the television is 65 inches. What is the

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Answer:

Width of T.V. is 21.94 inches Height is 39 inches and area is 855.66 square inch.

Step-by-step explanation:

When we buy an electronic item like T.V or Blue Ray aspect ratio is the term which is used by the salesmen or technicians. Aspect ratio is actually the ratio of length and breadth of the screen of a device or ration of width and height.

In this question aspect ratio of television is given as 16:9

This can be written as $\frac{W}{H}=\frac{16}{9}$ or $W=\frac{16}{9} H$

Screen of the T.V. is 65 inch which is the diagonal length of the screen.

We know from pythagoras theorem in a right angle triangle

$(diagonal)^{2}=(base)^2+(height)^2$

$(65)^2=(Base)^2+(height)^2$

$(65)^2= W^2+H^2 = (\frac{16}{9}H)^2+H^2$

$(65)= \sqrt{\frac{16}{9}H^2+H^2}\\ 65=H\sqrt{\frac{16}{9}+1}\\ 65=H\sqrt{\frac{25}{9}}\\ 65=\frac{5}{3}H\\ H=39 inches$

Now height of the T.V.will be

$\frac{W}{H}=\frac{16}{9} \\\\\frac{H}{W}=\frac{9}{16}\\ H=\frac{9}{16}W = (\frac{9}{16})39= 21.94 Inches$

now area of the T.V.=W×H=39×21.94=855.66 square inch

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3 years ago

Read 2 more answers

True or false 398+9 = 400+8

defon

Answer: False

Step-by-step explanation:

398 + 9 = 407

400 + 8 = 408

If the equation was 398 + 10 then yes it will be equal to 400 + 8

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3 years ago

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Answer:

8 hours

Step-by-step explanation:

12/2= 6
He grades 6 exams per hour
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it would take 8 hours to grade 48 exams

Bonus:
it takes him 10 minutes to grade an exam. That doesnt matter for this question but it's good 2 know

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