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Oduvanchick [21]
3 years ago
12

Use mental math to find the sum. 53 + 38

Mathematics
2 answers:
Inga [223]3 years ago
7 0

Answer:

91

i did it in my head!

arlik [135]3 years ago
6 0
91 is the answer to your question:)
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By United States cultural standards, it has been determined that 6 people live comfortably in 1500 square feet of living space.
Nimfa-mama [501]

Answer:

50,000

Step-by-step explanation:

Set up a proportion:

6/1500 = 200/x

Cross multiply and solve for x:

200x1500 = 6x

300000 = 6x

50000 = x

7 0
3 years ago
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Find the unit rate. 12 laps in 30minutes. <br> Asking for fraction
11Alexandr11 [23.1K]

Answer:

4/10 maybe cuz 12 divided by 30 is 0.4 and 0.4 would be 4/10

7 0
3 years ago
A bag contains 5 milk and 9 dark chocolates.
-Dominant- [34]

Answer:

5/9

Step-by-step explanation:

5 0
2 years ago
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round y
tino4ka555 [31]

Answer:

0.8762 or 87.62%

Step-by-step explanation:

Since our mean is μ=14.3 and our standard deviation is σ=3.7.  If we're trying to figure out what percentage is P(10 ≤ x ≤ 26) equal to we must first calculate our z values as such:

z=\frac{x-\mu}{\sigma}

Our x value ranges from 10 to 26 therefore let x=10 and we obtain:

z=\frac{10-14.3}{3.7} =-1.16\\

If we look at our z-table we find that the probability associated with a z value of -1.16 is 0.1230 meaning 12.30%.

Now let's calculate the z value when x = 26 and so:

z=\frac{26-14.3}{3.7}=3.16\\

Similarly, we use the z-table again and find that the probability associated with a z value of 3.16 is 0.9992 meaning 99.92%.

Now we want to find the probability in between 10 and 26 so we will now subtract the upper limit minus the lower limit in P(10 ≤ x ≤ 26) therefore:

0.9992 - 0.1230 = 0.8762

or 87.62%

7 0
3 years ago
00:00
andreev551 [17]

Answer:

I need Help on this one too.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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