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sergejj [24]
2 years ago
6

Can some one pls help and have a blessed day

Mathematics
1 answer:
Anna35 [415]2 years ago
4 0

Answer:

B. 20h

B. n/2

A. y-3

A. 8t

hope this helps

have a good day :)

Step-by-step explanation:

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Choose the benchmark that 3-7/12<br> closest to<br> 3-1/2<br> 2.<br> 3
luda_lava [24]

Answer:

3

Step-by-step explanation:

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3 years ago
if a cat would dance for 412 hours without getting tired how many hours can a total of 7 cats dance for
koban [17]
58.8 I divided 412/7 and it gave me a decimal and random numbers :(
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3 years ago
A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school w
AlekseyPX

Answer:

We have strong evidence that on average, students study less than 150 minutes per night during the school week

Step-by-step explanation:

Normal distribution:

mean     μ₀ = 150

Sample:

Sample size    n = 272

Sample mean   x = 141

Sample standard deviation  s  = 66

The standard error of the sample mean  SE = σ /√n

SE = 66/√272

SE = 66 / 16,49

SE = 4

Test Hypothesis:

Null hypothesis                            H₀             x  =   μ₀

Alternative hypothesis                Hₐ            x <    μ₀

z(s)  test statistics is:

z(s)  =  ( x  -  μ₀ ) / s/√n

z(s) = - 9 /4

z(s) =  -  2,25

p-value  for that z(s)      p-value  = 0,0122

Then for α =  0,05 p-value < 0,05

We are in the rejection region we need to reject H₀

7 0
3 years ago
Dinner at chili's came to 27.00. You want to leave a tip of 15%,how much money will you leave for just the tip
sveticcg [70]

Answer:

4.05 dollars

Step-by-step explanation:

4 dollars and 5 cents. 15 percent of 27 is 4.05

8 0
3 years ago
ਕind me<br>When x = 4 and y = 3, find the value of:<br>a) 2x + 7y - 10​
Andre45 [30]

Answer:

19

Step-by-step explanation:

by replacing x and y with their given values ,

we get :-

=》2x + 7y - 10

=》(2 × 4) + (7 × 3) - 10

=》8 + 21 - 10

=》29 - 10

=》19

5 0
3 years ago
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