When this car moves forward by 180 cm, each wheel does one full turn.What is the diameter of the wheels to the nearest centimetre?

Answers

Answer 1

Answer: d is the diameter of the wheel
the circle is π.d = 180
so d = 180/π = 57 cm

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Twenty five students are in a class. Each student will have one half of a sandwich for a snack. Each sandwich is made with two slices of bread. How many slices of bread are needed to make enough sandwiches for each student to have one-half of a sandwich for a snack?

Answers

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A collection of 8 backpacks has a mean weight of 14 pounds. A different collection of 12 backpacks has a mean weight of 9 pounds. What is the mean weight of the 20 backpacks? Explain how you found your answer.

Answers

Total weight of the first 8 backpacks
8*14
112 pounds

Total weight of the second 12 backpacks
12*9
108

Total weight of the whole 20 backpacks
112+108
220

So the mean weight of the 20 backpacks
220 / 20
11

Answer: 11

Step-by-step explanation:

We know that mean of a number of observations is given by :-

$\text{Mean}=\frac{\text{Sum of all observations}}{\text{Number of observations}}\n\n\Rightarrow\ \text{Sum of all observations}=\text{Mean*Number of observations}$

Given: The mean weight of 8 backpacks = 14 pounds

$\Rightarrow\ \text{Sum of weight of 8 backpacks}=14*8=112$

The mean weight of different 12 backpacks =9 pounds

$\Rightarrow\ \text{Sum of weight of 12 backpacks}=12*9=108$

Now, Total sum of all observations = 112+108=220 pounds

Now, the mean weight of the 20 backpacks is given by :-

$\text{Mean}=(220)/(20)=11$

What is ninrteen times x divided by 100

Answers

19*x
then divide by 100
(19*x)/100=x times (19/100)=x times 0.19=0.19x

simplified version would be 0.19x but the othe answer is (19x)/(100)

Hey there, 19*x/100=19x/100, if you want to divide it you would do 19x/19=100/9=5.26

Please answer correctly !!!! Will mark brainliest !!!!!!

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My answer that I got is 1 4/5

Whats the answer i have no idea and I'm really having a hard time

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remember order of operations exponents first r^2 since r=7 it is 7^2 which equals 49 then you multiply it by 3.14 which would give you 153.86

The moon is about 240,000 miles from Earth.What is this distance written as a whole number multiplied by a power of ten? SHOW YOUR WORK!! 15 points if u ANWSER NOW!!! HURRY BEFORE QUESTION DELETED

Answers

The answer is 24 multiplied by 10 to the power of 4

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