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AlekseyPX
3 years ago
6

The string that produces the lowest tone on a piano vibrates 87 times in 3 seconds. How many times would this string vibrate in

12 seconds?
Mathematics
1 answer:
kenny6666 [7]3 years ago
6 0

Answer:

21.75

Step-by-step explanation: 87 x 3  * 12

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3 years ago
4×+12=36 what number goes in the x?
Nataliya [291]
You can work this out by rearranging the equation and isolating the x.

4x + 12 = 36

4x = 36 - 12 (I moved the +12 to the other side, which means it becomes -12)

4x = 24 (36 - 12 = 24)

x = 24 / 4 (You need to isolate the x, and because it was being multiplied by 4, I divided both sides by 4 to leave me with just x)

x = 6 (24 divided by 4 is 6). 
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hichkok12 [17]

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4 0
3 years ago
Read 2 more answers
Solve for x.<br> 3(15 - x) = 2x
Morgarella [4.7K]

Answer:

well

Step-by-step explanation:

3 times 15 is 45

then 3 times negative x is -3x

so 45 - 3x = 2x

3 x moved to the other side turns positive

so you have

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8 0
2 years ago
What is the slope-intercept form of the equation y - 7= -5/2(x+4)
GREYUIT [131]
The first thing I would probably do is distribute (multiply) the -5/2 into the parenthesis:

= (-5/2)x + (-20/2)

Notice how I am not putting the x into the fraction. This is to make it easier to see the slope-intercept form.

Lets simplify the (-20/2) and then add 7 to both sides:

y - 7 = (-5/2)x - 10

y = (-5/2)x - 3

Your answer would then be:

y = (-5/2)x - 3

y = mx + b

Since it is now in the requested format.
4 0
2 years ago
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