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S_A_V [24]
3 years ago
15

Solve the equation for z^3-z^2-12z=0 The solutions are z=?, z=?, and z=?

Mathematics
1 answer:
Assoli18 [71]3 years ago
3 0

Answer:

z is equal to 0,4, and -3

Step-by-step explanation:

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Two students walk in the same direction along a straight path, at a constant speed - one at .90 m/s and the other at 1.90 m/s.a.
anyanavicka [17]

Answer:

a)The second student arrive 7 minutes and 36 seconds sooner

b)They have to walk 598,51 m

Step-by-step explanation:

Speed= Distance/Time

We are looking for time now

Time = Distance/Speed

First student

Time = 780 m/0.90 m/s=866,66 seconds

Second student

Time = 780 m/1.90 m/s=410,52 seconds

Difference=866,66-410,52= 456,14 seconds

In minutes

Difference= 456,14 seconds /60=7 minutes 36 seconds

Distance=Speed x Time

Speed¹ x Time¹ =Speed² x Time²

Time¹= Time² + 5.50 min

5.50 min =350 seconds

Time²  =Speed¹ x Time¹ /Speed²

Time²  =Speed¹ x (Time² + 350 seconds  ) /Speed²

Time²  =0.9 x (Time² + 350 seconds  ) /1.9

Time²  =0,4737 x (Time² + 350 seconds  )

Time²  =0,4737 Time² + 165,79 seconds

Time²  - 0,4737 Time² = 165,79 seconds

0,5263 Time² = 165,79 seconds

Time² = 165,79 seconds/0,5263 =315,01 seconds

Distance=1,9 x 315,01 seconds = 598,51 m

5 0
3 years ago
Katrina randomly selected 64 students out of her school of 400 students and found that 40 of them want school to start at a late
SashulF [63]

- The sample size is 64.

- The point estimate of the population proportion is 0.625.

-The margin of error is approximately 16%.

6 0
3 years ago
Read 2 more answers
O is the centre of the circle, EF is a tangent, angle BCE=28 degrees, angle ACD=31 degrees.
Yuki888 [10]

Answer:

a. 28˚

b. 76˚

c. 104˚

d. 56˚

Step-by-step explanation

a. because angle between tangent and chord is equal to the angle(s) in alternate segment.

b. because angles in triangles add up to 180˚, 180-28=152 and because isosceles triangle, 152/2=76˚

c. because angles in triangles add up to 180˚ and opposite angles in a cyclic quadrilateral add up to 180˚, 31+76=107, 180-107=73, 73-28=45, angles in triangle so 180-(31+45)=104˚

d. 28*2=56˚ because angles at circumference are half angles at centre

4 0
3 years ago
This box is 3/4 inch long, 1/2 inch wide, and 3/4 inch deep. What is the volume of the box? i​
satela [25.4K]

Answer:

8/4 or just 2

Step-by-step explanation:

3/4 + 1/2 + 3/4 = 4/8

but 4/8 simplified get you 2

3 0
2 years ago
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Aisha organize her books for 1/6 hour and her coin collection for 3/7 hour what is the best estimate for the total time Aisha sp
jeyben [28]
This is the ans plus u can use maths from Microsoft app for these type of questions

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3 years ago
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