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erastova [34]
3 years ago
10

Which expression is the simplified form of -10 + 3x - x - 7x + 5x + 7 + 2x?

Mathematics
1 answer:
Mars2501 [29]3 years ago
8 0

Answer:

B

Step-by-step explanation:

-10 + 3x - x - 7x + 5x + 7 + 2x

combine like terms

-10 + 3x - x - 7x + 5x + 7 + 2x

-3 + 3x - x - 7x + 5x + 2x

the -7x and the 5x + 2x cancel out to 0, so for the x terms we are left with 3x -x to get 2x

= 2x - 3

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The thickness of eight pads designed for use in aircraft engine mounts are measured. The results, in mm, are 41.8, 40.9, 42.1, 4
nika2105 [10]

Answer:

We accept H₀ we don´t have enough evidence to support that the mean thickness is greater than 41 mm

Step-by-step explanation:

Sample Information:

Results:

41.8

40.9

42.1

41.2

40.5

41.1

42.6

40.6

From the table we get:

sample mean :  x  =  41.35

sample standard deviation    s = 0.698

Hypothesis Test:

Null Hypothesis                    H₀                x = 41

Alternative Hypothesis        Hₐ                x > 41

The test is a one-tail test

If significance level is  0.01 and n = 8  we need to use t-student distribution

From t-table  α = 0.01  and degree of freedom  df = n - 1  df = 8 - 1

df = 7    t(c) = 2.998

To calculate t(s)  =  (  x  -  41 ) / s/√n

t(s)  =  (  41.35  -  41 ) / 0.698/√8

t(s)  = 0.35 * 2.83/ 0.698

t(s) = 1.419

Comparing   t(s)  and t(c)

t(s) < t(c)

t(s) is in the acceptance region we accept H₀

7 0
3 years ago
A punch bowl had 2\dfrac122 2 1 ​ 2, start fraction, 1, divided by, 2, end fraction liters of juice in it. Liam drank \dfrac13 3
8_murik_8 [283]

Answer:

5/6 liters.

Step-by-step explanation:

Given that:

Amount of juice in a punch bowl = 2 * 1/2 liters

= 5/2 liters.

Part of juice drank by Liam from the bowl = 1/3

Amount of juice drank by Liam =

= 5/2 * 1/3 = 5\6 liters.

4 0
3 years ago
Using 5,7,2 to equal 6
choli [55]

Answer:

here my answer

Step-by-step explanation:

5+1=6

7-1=6

3x2=6

hope it helps :)

8 0
3 years ago
Read 2 more answers
The volume of a cylinder is 225 pi centimeters to the third and its height is 9 cm what is the length of the cylinders radius
Thepotemich [5.8K]

Answer:

3

Step-by-step explanation:

5 0
3 years ago
(100 points if answered) (attatched screenshot) Algebra II need question 1 and 2
Elanso [62]
Domain: (-♾,2)U(2,♾), {x | x ≠2}
Range: (-♾,3) U(3,♾), {y | y ≠ 3}

Sorry that’s all I can help with


3 0
3 years ago
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