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malfutka [58]
2 years ago
5

Select Correct or Incorrect for each equation.

Mathematics
1 answer:
AlekseyPX2 years ago
6 0

Answer:

-1-1=-1 is incorrect.

-1+1-1=-1 is correct.

Step-by-step explanation:

Add them all up and if they do not equal what is on the other side of the equal sign, then it is incorrect. If it does add up to what is on the other side of the equal sign, then it is correct.

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Explain further? Thanks....
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Answer:

  1. The value of 0.9* 10² is <u>D</u><u>.</u><u>9</u><u>0</u><u>.</u>
  2. <u>4</u><u>*</u><u>(</u><u>1</u><u>2</u><u>-</u><u>8</u><u>)</u><u>+</u><u>2</u><u>³</u>
  • 4*4+2³
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a.

<u>False</u><u> </u><u>:</u><u> </u><u>it</u><u> </u><u>is</u><u> </u><u>to</u><u> </u><u>add</u><u> </u><u>1</u><u>6</u><u>+</u><u>8</u>

<u>b</u><u>.</u>

<u>False</u><u> </u><u>:</u><u> </u><u>its</u><u> </u><u>8</u><u>.</u>

<u>c</u><u>.</u>

<u>True</u><u>.</u>

<u>d</u><u>.</u>

<u>False</u><u> </u><u>:</u><u> </u><u>its</u><u> </u><u>2</u><u>4</u><u>.</u>

<u>3</u><u>.</u>

<u>side</u><u> </u><u> </u> of cube [a]=2ft

volume of cube [V]=a³=2³=8ft³

<u>He</u><u> </u><u>needs</u><u> </u><u>1</u><u> </u><u>bag</u><u> </u><u>to</u><u> </u><u>buy</u><u>.</u><u>As</u><u> </u><u>its</u><u> </u><u>volume</u><u> </u><u>is</u><u> </u><u>equal</u><u>.</u>

7 0
2 years ago
Birth weights of babies born to full-term pregnancies follow roughly a Normal distribution. At Meadowbrook Hospital, the mean we
Marina86 [1]

Answer:

Required Probability = 0.1283 .

Step-by-step explanation:

We are given that at Meadow brook Hospital, the mean weight of babies born to full-term pregnancies is 7 lbs with a standard deviation of 14 oz.

Firstly, standard deviation in lbs = 14 ÷ 16 = 0.875 lbs.

Also, Birth weights of babies born to full-term pregnancies follow roughly a Normal distribution.

Let X = mean weight of the babies, so X ~ N(\mu = 7 lbs , \sigma^{2}  = 0.875^{2}  lbs)

The standard normal z distribution is given by;

              Z = \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } ~ N(0,1)

where, X bar = sample mean weight

             n = sample size = 4

Now, probability that the average weight of the four babies will be more than 7.5 lbs = P(X bar > 7.5 lbs)

P(X bar > 7.5) = P( \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } > \frac{7.5-7}{\frac{0.875}{\sqrt{4} } }  ) = P(Z > 1.1428) = 0.1283 (using z% table)

Therefore, the probability that the average weight of the four babies will be more than 7.5 lbs is 0.1283 .

8 0
3 years ago
Suppose that a chemist is mixing two acid​ solutions, one of 50​% concentration and the other of 60​% concentration. Which of th
Flura [38]
Mixing the two concentrations would give a new concentration which is in between 50 - 60% .

D. 63% cannot be obtained
8 0
3 years ago
PLZ HELP ME!!!!!!!!!!!!!!!!!
Troyanec [42]

The answer is A. 59.49


5 0
3 years ago
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