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Dafna11 [192]
3 years ago
9

What can you hear but not see or touch,even though you can control it?

Mathematics
2 answers:
trapecia [35]3 years ago
3 0

Answer:

Your thoughts

Step-by-step explanation:

:) Have a nice day. Hope this helped. Please mark brainliest!

marshall27 [118]3 years ago
3 0

Answer:

your voice  

Step-by-step explanation:

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A simple impact crater on the moon has a diameter of 15 kilometers. a complex impact crater has a radius of 30 kilometers. how m
timurjin [86]
The general equation for computing the circumference of a circle is C=\pi d, where C is the circumference, and d is the diameter. (You might also see the equation as C=2 \pi r where r is the radius, because d=2r)

Computing the circumferences of the two circles, we get:
C_{d=15}=\pi (15)=15\pi
C_{d=30}=\pi (30)=30\pi.

To calculate the ratio of two numbers, we can divide one by the other. You can look at this as "How many times does the denominator fit in the numerator?"
\frac{C_{d=30}}{C_{d=15}}=\frac{30\pi}{15\pi}=2
So the circumference of the complex impact crater is 2 times greater than the circumference of the simple impact crater.
7 0
3 years ago
Emi made a 90 on her math test. There was 60 problems on her test. How many did she miss?
viva [34]
If she made a 90 that means 90 percent aka .90 so multiply that by 60 to get 54 right aka 6 wrong which you could find either by subtracting 54 from 60 or solving for 10 percent bc she got that much wrong and multiply .10x60=6 wrong
3 0
3 years ago
Find the number of tiles in the 57th figure. justify your answer using an algebraic expression
attashe74 [19]
3,365 tiles! the equation is always (x+1)^2 (squared) + 1 = Y. because y is the number of tiles and the x is whatever figure you’re on. but the figures start like #1 is a 2x2 instead of a 1x1 so 57th figure would not be 57x57 but 58x58. and then add 1 because there’s always that top left corner tile! if you appreciate my answer giving it brainliest is always appreciated!!
8 0
2 years ago
Use properties of equality to Solve 7+3x = 5x+13 for x
mario62 [17]
We basically have to cancel values on both sides until they are both on common ground.

7 + 3x = 5x + 13

-7 from both sides...

3x = 5x + 6

-5x from both sides...

-2x = 6

/-2 from both sides...

x = -3


Hope this helps!
8 0
3 years ago
Express .0000257 in scientific notation
sukhopar [10]

Answer:

2.57 x 10^(-5)

Step-by-step explanation:

you have to move the comma sign in front of the first number considering 0 as a non-number.

6 0
3 years ago
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