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Daniel [21]
3 years ago
8

A sleep study found that the number of hours each person slept was normally

Mathematics
1 answer:
kifflom [539]3 years ago
8 0

Answer:

6.1-10.3

Step-by-step explanation:

Multiply standard deviation times 3 = 2.1

Subtract and add to mean.

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−5a – ( 6a + 3) + 8}<br> plz help show step by step
Rom4ik [11]

Answer:

11a+5

Step-by-step explanation:

-5a-6a-3+8

=11a+5

5 0
3 years ago
If RS=3x + 1, ST= 2x - 2, and RT=64 find the value of x
Ulleksa [173]
For this question, we can assume that RS + ST = RT.  So now, we just have to plug in the expressions for these lengths, and solve the equation.

(3x+1) + (2x-2) = 64

Because we are only dealing with one operation, the parentheses aren't necessary.

3x + 1 + 2x - 2 = 64

Next, we should combine like terms on the left side of the equation. We know that 3x + 2x = 5x, and that 1 - 2 = -1.

5x - 1 = 64

The goal of an equation is to get the variable alone.  To do this, we have to get rid of the -1 on the left side of the equation.  So, we are going to add 1 to both sides of the equation, to cancel out the -1 on the left side.

5x = 65

Finally, we are going to divide both sides by 5, as this is the inverse operation of multiplication, which is how the 5 and the x are connected.

x = 13

Therefore, the value of x is 13.
3 0
3 years ago
I need help with my math
zhannawk [14.2K]

Answer:

Undefined

Step-by-step explanation:

Same x coordinates with different y values is considered undefined

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0.9278 round to the nearest tenth
Zarrin [17]
0.9 is 0.9278 rounded to the nearest tenth. Hope this helps!
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How can you compare 7/10 and 1/2 without using a model?
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Seventy-three is the answer
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