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kari74 [83]
3 years ago
6

The question is in the picture ​

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
8 0
USE SOCRACTIC IT WOULD REALLY HELP WITH THIS QUESTION
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A rock is thrown from the top of a tall building.The distance in feet between the rock and the ground t seconds after thrown is
marusya05 [52]

Answer:

0.448 seconds

Step-by-step explanation:

d = -16t² -4t + 412

find t when d = 407

substituting d = 407 into the equation:

407 = -16t² -4t + 412 (subtract 407 from both sides)

-16t² -4t + 412 - 407 = 0

-16t² -4t + 5 = 0 (multiply both sides by -1)

16t² + 4t - 5 = 0  

solving using your method of choice (i.e completing the square or using the quadratic equation), you will end up with

t = (-1/8) (1 + √21)= -0.70 seconds (not possible because time cannot be negative)

or

t = (-1/8) (1 -√21) = 0.448 seconds (answer)

4 0
3 years ago
Help me please, not very good at math. Thank u:)
ozzi

Answer:

76cm^2

Step-by-step explanation:

Separate the shape into two different rectangles. Then add the area of the rectangles together.

4 x 4 = 16

6 x 10 = 60

16 + 60 = 76

8 0
2 years ago
Read 2 more answers
david took 10 1/2 hours over 3 days to build airplane. he spent 3 1/4 hrs the firsr day and 4 2/3 hours the second day. how many
Anuta_ua [19.1K]
2 7/12 hours

X=101/2 - ( 3+4+1/4+2/3)

X=101/2 - 7 + (1/4+2/3)

1/4+2/3= 11/12

101/2 - 7 =3 1/5

X = 3 1/5 - 11/12 = 2 7/12
8 0
3 years ago
Anthony is saving money to buy $240 MP3 player. Anthony starts off with $50 in his bank account and add $20 each week. State the
Mazyrski [523]

Answer:

240 = 50 + 20x

5 0
3 years ago
Which equation can be used to determine the distance between the origin and (–2, –4)?
Mashutka [201]
When trying to determine the distance between two points, one would use the distance formula.

The distance formula is attached above and all you need to do is plug in the points in order to get the distance.

For example, if you were to plug them in, you would get:

√(0+4)^2 + (0+2)^2

6 0
3 years ago
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