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Xelga [282]
3 years ago
15

A)2a+ 1=2a+3

Mathematics
2 answers:
Montano1993 [528]3 years ago
8 0

Answer:

I'm not sure but at least i tried

11111nata11111 [884]3 years ago
4 0
A) the answer is a=2
c) the answer is 2a = 2
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Find the 7th term in the expansion of (3x^2+4)^11​
stiks02 [169]

Answer:

6.9261307e+23

Step-by-step explanation:

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3 years ago
I NEED HELP WITH MATH<br><br>Question: (In the pic)
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Inequality, because want to know when we'll make a profit.
d (- 680+ 960) \geqslant 52000 \\  280d \geqslant 52000
Profit: Let's See When 280d equals 52000

d \geqslant  \frac{52000}{280}  \\ d \geqslant 185.71
So, after 190 days Julianne will make a profit
280(190) \geqslant 52000 \\ 53200
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3 years ago
A bag with 6 marbles is shown below. (3 marbles are red, 1 is yellow, and 2 are blue.) A marble is chosen from the bag at random
11Alexandr11 [23.1K]

Answer:The answer is 1/2 or you can do 3/6 if it doesnt need to be simplified

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the
Darya [45]

Answer:

Brand 1    Brand 2    Difference

37734       35202        2532

45299      41635         3664

36240      35500        740

32100      31950         150

37210       38015       −805

48360     47800        560

38200    37810          390

33500    33215        285

Sum of difference = 2532+ 3664+740+150 −805+  560 +390 +285 = 7516

Mean = d=\frac{7516}{8}

Mean = d=939.5

a) d= 939.5

\text{Sample Standard deviation, s} = \sqrt{\dfrac{(x-\bar{x})^2}{n-1}}

=\sqrt{\dfrac{(2532-939.5)^2+(3664-939.5)^2+(740-939.5)^2 ...+(285-939.5)^2}{8-1}}

=1441.21

b)SD= 1441.21

c)Calculate a 99% two-sided confidence interval on the difference in mean life.

confidence level =99%

significance level =α= 0.01

Degree of freedom = n-1 = 8-1 =7

So, t_{\frac{\alpha}{2}}=3.499

Formula for confidence interval = \left( \bar{X} \pm t_{\frac{\alpha}{2}} \times \frac{s}{\sqrt{n}} \right)

Substitute the values

confidence interval = 939.5 \pm 3.499 \times \frac{1441.21}{\sqrt{8}} \right)

confidence interval = 939.5 - 3.499 \times \frac{1441.21}{\sqrt{8}} \right) to  = 939.5 + 3.499 \times \frac{1441.21}{\sqrt{8}} \right)

Confidence interval −843.396\ to  2722.396

8 0
3 years ago
I
vlabodo [156]
The answer would be letter b
6 0
2 years ago
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