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3 years ago

Prove that in general (x + a) 2 ≠ x2 + a2

Mathematics

1 answer:

qwelly [4]3 years ago

6 0

Answer:

yes they are not equal because (x + a) = 2x + 2a

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#2 Find the area.<br> 10ft

den301095 [7]

Answer:

It would be 78.539...

Step-by-step explanation:

So the equation for area is π r^2. We don't have the radius but we have the diameter. Since the radius is always 1/2 of the diameter, simply divide 10/2 to get this.

Now with the radius, it can simply be plugged into the equation for the answer:

π r^2,

π 5^2,

π 25

78.539...

7 0

2 years ago

Read 2 more answers

If x=6, find the matching value for y. 2x-3y=6

Savatey [412]

Answer:

y=2

Step-by-step explanation:

if x=6 then 12-3y = 6 meaning y=2 because 12-6=6

6 0

3 years ago

54.7912 Rounded to the nearest hundredth

kupik [55]

Answer:

54.79 because if it's 4 and lower, you let them stay the same but if its five and above you let them go higher.

6 0

3 years ago

Select the equivalent expression that shows the fewest possible terms.

LenaWriter [7]

Answer:

Step-by-step explanation:

7a-10c-2a-0.5c+5

5a-10.5c+5

it is your first choice

7 0

3 years ago

Read 2 more answers

The angle of elevation to the top of a water tower from point A on the ground is 19.9°. From point B, 50.0 feet closer to the to

zepelin [54]

Answer:

Answer in terms of a trigonometric function :

$h = \frac{20tan(19.9)}{0.4-tan(19.9)}$

Answer in figures

$h = 190.5 feet$

Step-by-step explanation:

Consider the sketch attached below to better understand the problem.

Let x be the distance between point B and the base of the water tower.

$tan (19.9)=\frac{h}{50+x} ---------------equation 1\\$

$tan (21.8)=\frac{h}{x}----------------equation 2$

From equation 2,

$x =\frac{h}{tan21.8}=\frac{h}{0.4}$

substituting the value of x into equation 1, we get

$tan (19.9)=\frac{h}{50+(\frac{h}{0.4} )}$

$tan 19.9=h\times \frac{0.4}{20+h}$

cross multiplying,

$20\times tan(19.9) +htan(19.9)=0.4h$

$20tan(19.9)= h(0.4-tan(19.9))$

$h= \frac{20tan (19.9)}{0.4-tan (19.9)}$

The height of the tower is $h= \frac{20tan (19.9)}{0.4-tan (19.9)}$ in terms of the trig function "Tan"

The equation can simply be evaluated to get the answer in figures since the angles are given in the question

5 0

3 years ago