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3 years ago

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

Mathematics

1 answer:

irakobra [83]3 years ago

6 0

Answer:

a-9=20

a=20+9

a=29

b-9>20

b>29

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♦⭐Will mark brainliest⭐♦

tatiyna

Answer:

C. X = 3

Step-by-step explanation:

Multiply both sides by 5 to remove fractions

2x = 6

divide by 2

x = 3

4 0

3 years ago

A particle is moving on a straight line with velocity

Lena [83]

$v = {t}^{2} - 6t + 5$

t=2

$v = {2}^{2} - 6 \times 2 + 5 = - 3$

7 0

3 years ago

How do I solve a problem like this??

Julli [10]

Well this is an equilateral triangle so then a=b. so then b=4 as well. so then now you have a^2 + b^2=c^2.

4^2+4^2=c^2

16+16=c^2

32=c^2

Find the square root of 32 which is approximately 5.65685.

Find the square root of c^2 which is c.

so then 5.65685=c

5 0

3 years ago

A binomial experiment is performed a fixed number of times. What is each repetition of the experiment called? Choose the correc

Marysya12 [62]

Answer:

D. Each repetition of the experiment is called a trial.

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials(experiments), and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

So the correct answer is:

D. Each repetition of the experiment is called a trial.

7 0

4 years ago

How do I work this out?

zvonat [6]

We have to determine the value of $\sum _{m=9} ^{21} (5m+6)$

= (5(9)+6) + (5(10)+6) +(5(11)+6) + .......... + (5(21)+6)

= 51+56+61+66+ ........ + 111

Since, the common difference is 5, hence this series is in arithmetic progression.

Sum of AP is given by the formula:

$\frac{n}{2}[2a+(n-1)d]$

Since, there are 13 terms.

= $\frac{13}{2}[2(51)+(13-1)5]$

= $\frac{13}{2}[102+60]$

= $\frac{13}{2}[162]$

= $13 \times 81$

= 1053

Therefore, the sum of the series is 1053.

So, Option G is the correct answer.

8 0

3 years ago