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4 years ago

Error Analysis your friend evaluate (10-5)/5 and gets 9 for an answer. Explain your friend's error

Mathematics

1 answer:

alexandr402 [8]4 years ago

7 0

Answer:

REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEeeeeEEEEEEEEEEEEeeeeeee make sure you thank it.

Step-by-step explanation:

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Urgent!

boyakko [2]

Step-by-step explanation:

18.

the last one.

-4.9t² + 24.5t + 117.6 = 0

the ball starts at 117.6 meters height. then, during the first seconds the thrust upwards is adding height, until finally, with more and more seconds passing, gravity will win with a vengeance and pulls the ball down faster and faster than any other force in any other direction.

19.

the general solution for a quadratic equation

y = ax² + bx + c

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

x = t

a = -4.9

b = 24.5

c = 117.6

t = (-24.5 ± sqrt(600.25 - -4×4.9×117.6))/-9.8 =

= (-24.5 ± sqrt(600.25 + 2304.96))/-9.8 =

= (-24.5 ± sqrt(2905.21))/-9.8 = (-24.5 ± 53.9)/-9.8

t1 = (-24.5 + 53.9)/-9.8 = -3

t2 = (-24.5 - 53.9)/-9.8 = 8

a negative time does not make any sense, so the real solution is : the ball reached the ground after 8 seconds.

20.

now the equation is

-4.9t² + 24.5t + 117.6 = 49

but this is quickly transformed again into a "= 0" equation :

-4.9t² + 24.5t + 68.6 = 0

t = (-24.5 ± sqrt(600.25 - -4×4.9×68.6))/-9.8 =

= (-24.5 ± sqrt(600.25 + 1344.56))/-9.8 =

= (-24.5 ± sqrt(1944.81))/-9.8 = (-24.5 ± 44.1)/-9.8

t1 = (-24.5 + 44.1)/-9.8 = -2

t2 = (-24.5 - 44.1)/-9.8 = 7

again, negative time does not make sense.

the ball will be at 49 m height after 7 seconds.

5 0

3 years ago

Dan made $242 for 11 hours of work.

creativ13 [48]

He needs to work 8 hours

7 0

3 years ago

Venetta and Bill each made a chain of paper clips and measured their lengths Venetta's paper clip chain was 3 feet 5 inches long

damaskus [11]

Answer:

Vennetta

Step-by-step explanation:

Length of Venetta's paper clip chain = 3 feets 5 inches

Length of Bill's paper clip chain = 39 inches

Converting both Venetta's paper clip chain length to inches only :

1 foot = 12 inches

3 feets = (12 * 3) = 36 inches

Hence,

Length of Venetta's paper clip chain in inches :

(36 + 5) inches = 41 inches

41 inches > 39 inches .

Hence, Venetta has the long clip chain.

8 0

3 years ago

Lara wrote the following statement:

trapecia [35]

C. Lara is incorrect, because more than one triangle can be drawn with the given information.

4 0

3 years ago

Read 2 more answers

What are the 2 key parts of an exponential function

Serga [27]

Answer:

The a and the base value

Step-by-step explanation:

Depending on the number of the a or b value, the graph can be completely altered! In a standard exponential function, the b value is 2

An exponential function with both an a and a B value looks like this:

$f(x) = a(b)^x\\$

The a value is the starting point of the exponential function. Not all function will have starting points, mind you! The a value can be negative or positive, which would affect the point which the graph of the exponential function starts.

The b value is like the 'rate of change' for the exponential function. It can also be positive or negative -- depending on the sign of the b value, the function can decrease of increase.

4 0

3 years ago

Error Analysis your friend evaluate (10-5)/5 and gets 9 for an answer. Explain your friend's error​

Error Analysis your friend evaluate (10-5)/5 and gets 9 for an answer. Explain your friend's error