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Sati [7]
3 years ago
12

The mean of six numbers is 25. Three of the numbers are 15, 15, and 30. The second unknown number is twice the first unknown num

ber, and third unknown number is twice the sum of the first two unknown numbers.
Find the unknown numbers.
Mathematics
2 answers:
Over [174]3 years ago
6 0

Answer:

The first unknown number is 10

The second unknown number is 20

The third unknown number is 60

Step-by-step explanation:

15 + 15 + 30 + 10 + 20 + 60 = 150

150/6 = 25

svlad2 [7]3 years ago
4 0

Answer:

The first unknown number is 10 the second is 20 and the third is 60

Step-by-step explanation

Since there is six numbers you have to multiply 25 times 6 = 150

Then 15+15+30=60

150-60= 90

10+20=30

30 times 2 equals 60

30+60=90

90+60= 150

150 divided by 6 = 25

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Step-by-step explanation:

0 + 1 + 2 + 3+ 4 + 5 + 6 + 7 +8 + 9 + 10 + 11 seems to equal 66. That means there are 11 + 1 = 12 people (don’t forget to count the person who shakes 0 hands)

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the length of a rectangle is 2 cm less than five times the width. the area of the rectangle is 16 cm^2. find the length and widt
ahrayia [7]
<span>length = L
</span>width = w

L = (5w-2) cm

w(5w-2)=16 \\ 5w^2-2w-16=0 \\ D=b^2-4ac=(-2)^2-4*5*(-16)=324 \\ w_{1,2}= \frac{-bб \sqrt{D} }{2a}  \\ w_1= \frac{2- \sqrt{324} }{2*5}= \frac{2-18}{10}=-1.6 \ \ \O \\ w_2=  \frac{2+18}{10}=2 cm

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3 years ago
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