All categories

3 years ago

Six numbers have a mean of 4.5 and five of the numbers are 4,3,4,6,1.

Mathematics

1 answer:

Maksim231197 [3]3 years ago

8 0

Answer:

X = 9

Step-by-step explanation:

4 + 3 + 4 + 6 + 1 + x / 6 = 4.5

18 + x / 6 = 4.5

cross multiply

18 + x = 4.5 × 6

18 + x = 27

collect like terms

x = 27 - 18

x = 9

You might be interested in

I WILL AKE YOU THE BRAINLIEST EASY QUESTION

avanturin [10]

Answer:

3rd choice

Step-by-step explanation:

9/5 = 18/10 = 1.8

All your numbers are between 1 and 2, and all have a fractional part that is a whole number of tenths. 1.3, 1.5, and 1.8 will be correctly shown by dots on the 3rd, 5th, and 8th marks.

6 0

4 years ago

Read 2 more answers

For question 3, is it right though? Thankss

pishuonlain [190]

Yes it is correct, 7/12 is the equivalent to C. 7 divided by 12

8 0

3 years ago

Estimate √38.7 to the nearest integer

Murljashka [212]

Well 6^2 is 36 so my best estimate is 6

7 0

3 years ago

Read 2 more answers

The swimming team has competed in 45 races this season. They have won 30 races so far. How many races will the team need to win

tatuchka [14]

Answer:

15 races

Step-by-step explanation:

The team has competed in 45 and has won 30. So the success rate is:

Success rate is:

$Sccess\ rate=r= \frac{30}{45}*100\\ =66.7\ percent$

We have to find the number of races the team needs to win for 75% success rate

Which means that

$r = \frac{30+x}{45+x} = 0.75\\$

We have to solve the equation for x

$\frac{30+x}{45+x}=0.75\\ 30+x = 0.75(45+x)\\30+x=33.75+0.75x\\x-0.75x=33.75-30\\0.25x=3.75\\x=\frac{3.75}{0.25}\\ x=15$

The team needs to win 15 races to get 75% success rate ..

4 0

3 years ago

Help on this one please

kirill [66]

Answer: A

Step-by-step explanation:

It’s A bc the other answers are not accurate for this problem lol

4 0

3 years ago