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daser333 [38]
3 years ago
14

-12.3 + 5.1 = x help me

Mathematics
1 answer:
Allushta [10]3 years ago
8 0

Answer:

x = -7.2

Step-by-step explanation:

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​Claim: Most adults would erase all of their personal information online if they could. A software firm survey of randomly selec
pychu [463]

Answer:

Test statistic = 3.863

Step-by-step explanation:

We are told that most adults would erase all of their personal information online if they could. Since the word "most" is used, it means more than 50% or 50 percent.

So, p_o = 0.5

Also, we are told that 58 % of them would erase all of their personal information online if they could.

Thus, p^ = 0.58

Number of randomly selected adults; n = 583

The test statistic formula for hypothesis test for proportion is given by:

z = (p^ - p_o)/[√[p_o(1 - p_o)/n]

Plugging in the relevant values, we have;

z = (0.58 - 0.5)/[√[0.5(1 - 0.5)/583]

z = 0.08/0.02070788416

z = 3.863

8 0
3 years ago
Albert bought 18 yards of clot. He used 5.7 yards for a decoration and 8.8 yard to make costumes for the school play. Express th
Ilia_Sergeevich [38]
18 - 5.7 = 12.3
12.3 - 8.8 = 3.5
3.5 to a fraction = 3 1/2

So the answer = 3 1/2

Hope this helps >.<
6 0
3 years ago
Evaluate the expression when k=-4<br> |k-2 • |3k|,- 1<br> a. 72<br> b. 71<br> c. 66<br> d. -73
Feliz [49]

Answer:

-6×12×-1=72

Step-by-step explanation:

just note that abs(k)

when k<0

is -k

6 0
3 years ago
Read 2 more answers
Emma biked 15 miles. One mile is approximately equal to 0.6 kilometers. What is the number of kilometers Emma biked?
Mademuasel [1]

Answer:

About 9 kilometers

Step-by-step explanation:

15x.6= 9

7 0
4 years ago
Read 2 more answers
What is the simplified form of 8b^3c^ 2a + 4b^3c^2?
stiv31 [10]
8b^{3} c^2+4b^{3} c^2
= (8+4) b^{3} c^2
=12 b^{3} c^2

Be carefully, normally there is no a in your expression. I think you made a mistake.

Hope this helps !

Photon
8 0
3 years ago
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