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Nonamiya [84]
3 years ago
5

I really really need help someone!! )):

Mathematics
1 answer:
yaroslaw [1]3 years ago
3 0

diameter is 15 meters then radius is 15/2 = 7.5 meters

so the amplitude is 7.5 m and height will oscillate with amplitude 7.5 m above and below the center.

midline of the oscillation will be 7.5 m

the wheel.take 8 minutes to complete revolution then it means the height will oscillate with a period of 8 minutes

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7 0
3 years ago
The sum of twelve and four times a number is 36. What is the number?
Greeley [361]

Answer:

8

Step-by-step explanation:

12 +4x = 36

Then solve the linear eqn

3 0
3 years ago
Helppppppppppppp ASAP
Strike441 [17]

Answer:

Option C and D

Step-by-step explanation:

For a quadratic function having no x-intercepts the discriminant should be less than 0 .

D=b^2-4ac

Now if this is less than zero if we plug in the values of a, b and c the square root of a negative number cannot be calculated thus giving us no real x-intercepts.

x=-b+-\frac{\sqrt{b^2-4ac} }{2a} \\\\x=-b+-\frac{\sqrt{D} }{2a}

Here we can see that if we the value of D is less than zero the square would not be possible thus our correct choices are ,

Option C and D

3 0
2 years ago
In how many ways can 4 singers be selected from 8 who came to an audition?
elena-s [515]

The first selection can be any one of the 8. 
               For each one ...
The second selection can be any one of the remaining 7. 
               For each one ...
The third selection can be any one of the remaining 6. 
               For each one ...
The fourth selection can be any one of the remaining 5.

Total number of ways to select four = (8 x 7 x 6 x 5) = 1,680 ways

BUT ... There are not 1,680 different groups of 4 .

Each group of 4 can be selected in (4 x 3 x 2) = 24 different ways.

So, although there are 1,680 different ways to select 4 singers,
there are only
                           (1,680 / 24) = 70 different groups of 4
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7 0
3 years ago
Find the minimum value of
devlian [24]

Answer:

2

Step-by-step explanation:

We will substitute a, b, c to the our formula

(2*5-2)/4 = 8/4 = 2

7 0
2 years ago
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