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Shalnov [3]
3 years ago
6

Explain how estimating helps you check the reasonableness of your answer

Mathematics
1 answer:
Mumz [18]3 years ago
5 0
It gets you closer to your answer.
Ex: 11×2-- Round 11 to 10 and then multiply and get 20. But if you get some answer like 50, you know it is wrong. But the answer is 23
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The results of a poll show that the percent of people in a town who want an observatory built on a nearby mountain is in the int
V125BC [204]
In finding this value you average lower and upper bound
  (0.6+0.82)/2 = 0.71   =0.71  estimated    margin of error = distance from  estimate point lower/ upper bound   This interval will be twice margin error
   (0.82-0.6)/2 = 0.11    How far is 0.82 from 0.71 ??   =0.11=11%

7 0
3 years ago
Solve the inequality 5 + 1/x > 16/x
sladkih [1.3K]

Answer:

x  <  0  or     x  >  3

Explanation:

6 0
3 years ago
Read 2 more answers
The center of a hyperbola is located at the origin. One focus is located at (−50, 0) and its associated directrix is represented
leva [86]

The equation of the hyperbola is : \frac{x^{2}}{48^2}  - \frac{y^{2}}{14^2}  = 1

The center of a hyperbola is located at the origin that means at (0, 0) and one of the focus is at (-50, 0)

As both center and the focus are lying on the x-axis, so the hyperbola is a horizontal hyperbola and the standard equation of horizontal hyperbola when center is at origin: \frac{x^{2}}{a^{2}}  - \frac{y^{2}}{b^{2}}    = 1

The distance from center to focus is 'c' and here focus is at (-50,0)

So, c= 50

Now if the distance from center to the directrix line is 'd', then

d= \frac{a^{2}}{c}

Here the directrix line is given as : x= 2304/50

Thus, \frac{a^{2}}{c}  = \frac{2304}{50}

⇒ \frac{a^{2}}{50}  = \frac{2304}{50}

⇒ a² = 2304

⇒ a = √2304 = 48

For hyperbola, b² = c² - a²

⇒ b² = 50² - 48² (By plugging c=50 and a = 48)

⇒ b² = 2500 - 2304

⇒ b² = 196

⇒ b = √196 = 14

So, the equation of the hyperbola is : \frac{x^{2}}{48^2}  - \frac{y^{2}}{14^2}  = 1

5 0
3 years ago
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Solve<br> 7x+2y=16<br> 5x-2y=20<br> x= y= <br><br> (3 marks)
sasho [114]
X=3 and y=-5/2. Here is why, when we do 7x+5x that gives us 12x. -2y+2y=0 and then we have 16 plus 20 which gives us 36. Now we gotta isolate x which right now we have 12x=36. Therefore divide by 12 to get x alone, which 36 divided by 12 is equal to 3. X=3. Plug it back into the equation, 7(3)=21 plus 2y=16. Subtract 21 from both sides 16-21 is equal to -5. Then 2y=-5 divide by 2 on both sides you will have -5/2=y or y=-5/2. Hope this helps!
8 0
2 years ago
Please hurry this is urgent like I need to submit RIGHT NOWWW PLEASEEE
vaieri [72.5K]

Answer:

I'm sorry m8, but the picture won't load, what is it? The screen is just black

4 0
3 years ago
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