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Rudik [331]
2 years ago
13

Please help will give u brainliest pls help me​

Mathematics
2 answers:
masya89 [10]2 years ago
5 0

Answer:

19

Step-by-step explanation:

1/2*(5+x)*4=48

Vlad [161]2 years ago
3 0
The formula for finding the area of a trapezium is:
Area= 1/2 x (a+b) x h
So the formula will work oppositely
4 cm is the height while 5 and the other 5 is sides.. sorry i can’t find the formula now
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A study was recently conducted to estimate the mean cholesterol for adult males over the age of 55 years. From a random sample o
Komok [63]

Answer:  Correct critical value = 2.2622

Step-by-step explanation:

Confidence interval for population mean when population standard deviation is unknown:

\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}} , where \overline{x} = sample mean, n= sample size, s= sample standard deviation, t_{\alpha/2} = two-tailed t value.

As per given: n= 10

degree of freedom : df = n-1=9

\overline{x}=242.6\\\\s=73.33\\\\\alpha=5\%=0.05

Critical t-value : t_{\alpha/2,df}=t_{0.05/2,9}=t_{0.025,9}=2.2622

So, the 95 percent confidence interval estimate for the​ mean :

242.6\pm (2.2622)\dfrac{73.33}{\sqrt{10}}\\\\=242.6\pm (2.2622)(23.19)\\\\\approx242.6\pm52.46\\\\=(242.6-52.46,\ 242.6+52.46)\\\\=(190.14,\ 295.06)

The 95 percent confidence interval estimate for the​ mean:(190.14, 295.06)

8 0
3 years ago
Please help and thank you
Scorpion4ik [409]

Answer:

a

Step-by-step explanation:

6 0
2 years ago
What is the average rate of change of the function on the interval from x = 1 to x = 2?
neonofarm [45]

x=1 f = 10(5.5)(1) = 55

x=2, f = 10(5.5)(2) = 110

110-55 = 55

2-1 =1

55/1 = 55

 average rate of change = 55

6 0
2 years ago
What is the probability of selecting a red jack from a deck of cards?
Ostrovityanka [42]

Answer:

There's 2 red jacks in a deck and 2 black queens in a deck so you have a total of 4 possible cards out of a 52 total in a deck so that would be 4/52 or 1/13 of the time. Statistically 7.6% of the time you will get a red jack or a black queen.

Step-by-step explanation:

3 0
2 years ago
Matt he bought five book he needed 9 how many more he needed
Dimas [21]

Answer:

5

Step-by-step explanation:

4 0
2 years ago
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