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tatiyna
2 years ago
8

5n2+100=30n , need help explaining how you would work this out

Mathematics
1 answer:
andreev551 [17]2 years ago
6 0

Answer:

n = 3 + i√11 ,  3 - i√11

Step-by-step explanation:

This is a quadratic equation  and the first step is to write it in standard form:

5n^2 - 30n + 100 = 0

Divide through by 5:

n^2 - 6n + 20 = 0

Completing the square:-

(n - 3)^2 - 9 + 20 = 0

(n - 3)^2 = -11

n - 3 = i√11 or - i√11

n = 3 + i√11 ,  3 - i√11

(2 complex roots).

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An amusement park recently increased the cost of a family season pass. The original price was $150. The new price is $183. What
viva [34]

Answer:

1.22%

Step-by-step explanation:

150 x 1.22 = 183

6 0
2 years ago
A skateboarding park charges $7 per session to skate and $4 per session to rent safety equipment. Your friend rents safety equip
beks73 [17]
He spent $36 on safety equipment.
The total cost each time was $11, meaning he had to pay 9 times for each skate session. 4x9=36!  ( 7x9= 63 so if you add  36 you'll get 99 just as a way of checking)

Do you watch/read pandora hearts?
3 0
3 years ago
The quotient of a number and -3 is at most 7
Grace [21]

Answer:

-21

Step-by-step explanation:

-3 * 7

5 0
3 years ago
Read 2 more answers
Abes apples orchard plants both green apple trees and red apple trees this planting will include 21 red apple trees and 18 green
Xelga [282]

Answer:

The ratio of green apples to red apples is .

Step-by-step explanation:

Given,

Number of red apples = 21

Number of green apples = 18

We have to find out the ratio of green apples to red apples.

Solution,

For finding the ratio we have to divide the number of green apples to the number of red apples.

So, we can frame the above sentence as;

Ratio = number of green apples/number of red apples

Now substituting the values, we get;

Ratio= 18/21 = 6/7

Hence The ratio of green apples to red apples is . 6/7

4 0
2 years ago
Please help me! I will give brainliest to the best answer
8_murik_8 [283]
1. When there are two events that need to happen, we must multiply the probability of each event happening.

Shawn losing to Mike: 5/8 chance
Shawn losing to Tim: 2/7 chance

5/8 × 2/7 = 10/56 = 5/28

There's a 5/28 chance of Shawn losing to Mike and Tim.

I don't know #2, sorry :/

Hope this helps!
5 0
3 years ago
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