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Darina [25.2K]
3 years ago
12

11.(4 pts) Given: A = 6x - x2 + 4x +8 and B= 2x3+x-5 Find a) A+B b) A-B

Mathematics
1 answer:
vivado [14]3 years ago
3 0

Answer:

a. 2x3-x2+11x+3

b.-2x3-x2+9x+13

Step-by-step explanation:

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fie abc un triunghi cu masura unghiului a de 90 de grade ab este 6 cm bc=10 si ca=8 calculati;sin b; tg b; sin c; tg c; cos b; c
lions [1.4K]
SinB = cosC = AC / BC = 8/10 = 4/5;
tgB = ctg C = AC/AB = 8/6 = 4/3, because we use T. Pitagora for calculating AB;
sinC = cosB = AB/ BC = 6/10 = 3/5;
tgC = ctgB = AB/ AC = 6/8 = 3/4.

6 0
3 years ago
A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 1
Harman [31]

The probability that the mean clock life would differ from the population mean by greater than 12.5 years is 98.30%.

Given mean of 14 years, variance of 25 and sample size is 50.

We have to calculate the probability that the mean clock life would differ from the population mean by greater than 1.5 years.

μ=14,

σ=\sqrt{25}=5

n=50

s orσ =5/\sqrt{50}=0.7071.

This is 1 subtracted by the  p value of z when X=12.5.

So,

z=X-μ/σ

=12.5-14/0.7071

=-2.12

P value=0.0170

1-0.0170=0.9830

=98.30%

Hence the probability that the mean clock life would differ from the population mean by greater than 1.5 years is 98.30%.

Learn more about probability at brainly.com/question/24756209

#SPJ4

There is a mistake in question and correct question is as under:

What is the probability that the mean clock life would differ from the population mean by greater than 12.5 years?

5 0
2 years ago
Please help me asap!!!!
musickatia [10]

Answer:

12

Step-by-step explanation:

t/9=16/12

12t=144

t=12

5 0
3 years ago
Only 16 -22 even plz it's due tomorrow
sdas [7]
16: 8/25; 38%; .41
18: 84% 43/50; 7/8; .91
20: 26.8%; 2.26; 2 2/5; 2.62; 271%
22: 21/25= 84% so yes
5 0
3 years ago
A number increased by 5
mrs_skeptik [129]

Answer:

if number was represented by x it would be x+5

Step-by-step explanation:

7 0
3 years ago
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