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qaws [65]
3 years ago
11

MP Persevere with Problems Suppose 20

Mathematics
1 answer:
grigory [225]3 years ago
7 0

9514 1404 393

Answer:

  8 people

Step-by-step explanation:

If 20 of 140 people play tennis, then in a group of 504 people, we expect ...

  (20/140) × 504 = 72 . . . . tennis players

If 1 of 9 tennis players has a coach, then in a group of 72 tennis players, we expect ...

  (1/9) × 72 = 8 . . . . have a coach

We expect 8 of the 504 people have a tennis coach. We made this prediction by applying the given rates to the larger group.

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Question 6
inna [77]

Answer:

add, subtract, multiply and divide complex numbers much as we would expect. We add and subtract

complex numbers by adding their real and imaginary parts:-

(a + bi)+(c + di)=(a + c)+(b + d)i,

(a + bi) − (c + di)=(a − c)+(b − d)i.

We can multiply complex numbers by expanding the brackets in the usual fashion and using i

2 = −1,

(a + bi) (c + di) = ac + bci + adi + bdi2 = (ac − bd)+(ad + bc)i,

and to divide complex numbers we note firstly that (c + di) (c − di) = c2 + d2 is real. So

a + bi

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c + di ×

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¶

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The number c−di which we just used, as relating to c+di, has a spec

7 0
2 years ago
HURRY AND AWNSER SISSYS
Llana [10]

Answer:

Neither

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
ASAP!!!! Calculate the finance charge and new balance using the previous balance method.
goldenfox [79]

Answer:

Previous balance = $199.19

Annual rate =14%

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New balance =$199.19+$27.7466-$97.50-$75.75=$53.6866

3 0
3 years ago
G<br> Express as a percent.<br> 4/5%
Aloiza [94]

Answer:

80%

Step-by-step explanation:

I'm assuming you meant express 4/5 as a percent and not 4/5%. So simply evaluate 4/5 to get 0.80. Now multiply this value by 100 to get the percentage which gives you 80%

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2 years ago
Compound inequalities
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3 years ago
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