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shutvik [7]
3 years ago
15

Kyle bought 3 tracks for his train set. Each track is inches long What is the total length of the 3 tracks ?

Mathematics
2 answers:
postnew [5]3 years ago
8 0

Answer:

try 9

Step-by-step explanation:

3 times 3

timurjin [86]3 years ago
4 0

Answer: 9

Step-by-step explanation:

3 x 3 = 9

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Point B is in the interior of ∠AOC, m∠AOC=108°, and m∠AOC=3·m∠AOB. Find m∠AOB.
SSSSS [86.1K]

Answer:

x+3x = 108

 

4x = 108

 

x = 108/4 = 27

 

27 and 81

hope this helps :)

3 0
3 years ago
Read 2 more answers
Aria is trying to build up her savings. Which are the three most helpful questions she should ask herself before making a purcha
4vir4ik [10]

Answer:

Do I really need it?

Can I find it for a cheaper price?

Can I replace it with something else that I already have or that has a lower price?

Step-by-step explanation:

When you are trying to build up your savings you need to to spent money only on the necessary things to be able to save more money every time you get paid. So, according to this, the three questions that Aria should ask herself before making a purchase are:

-Do I really need it? To make sure that it is something that you really require and not something that you just want to buy but it is not going to cover a need.

-Can I find it for a cheaper price? Maybe you can buy it in another place where the product has a lower price or you can get a cheaper brand.

-Can I replace it with something else that I already have or that has a lower price? Maybe you already have a product that does the same thing or you can buy one that replaces the function this one does and that is cheaper.

7 0
3 years ago
Please help
Anastasy [175]

Answer:

False

Step-by-step explanation:

2cos^2(4x) - 1 = cos(8x)

cos(8 *pi/12) = cos(2pi/3) = cos(pi - pi/3) = - cos(pi/3)= 1/2, which is not 0

cos(8x) = 0

==> 8x = 0 or pi

==> x = 0 or pi/8

8 0
3 years ago
What is the solution to the inequality |2n+5|>1​
tekilochka [14]

Answer:

ANSWER

n < - 3 \: or \: n > - 2n<−3orn>−2

EXPLANATION

The given inequality is,

|2n + 5| \: > \: 1∣2n+5∣>1

By the definition of absolute value,

- (2n + 5) \: > \: 1 \: or \: (2n + 5) \: > \: 1−(2n+5)>1or(2n+5)>1

We divide through by negative 1, in the first part of the inequality and reverse the sign to get,

2n + 5 \: < \: - 1 \: or \: (2n + 5) \: > \: 12n+5<−1or(2n+5)>1

We simplify now to get,

2n \: < \: - 1 - 5 \: or \: 2n \: > \: 1 - 52n<−1−5or2n>1−5

2n \: < \: - 6 \: or \: 2n \: > \: - 42n<−6or2n>−4

Divide through by 2 to obtain,

n \: < \: - 3 \: or \: n \: > \: - 2n<−3orn>−2

7 0
3 years ago
Consider 3 trials, each having the same probability of successes. Let X denote the total number of successes in these trials.
Mariulka [41]

Since each trial has the same probability of success, 

Let, <span><span><span>Xi</span>=1</span></span> if the <span><span>i<span>th</span></span></span> trial is a success (<span>0</span> otherwise). Then, <span><span>X=<span>∑3<span>i=1</span></span><span>Xi</span></span><span>X=<span>∑<span>i=1</span>3</span><span>Xi</span></span></span>, 

and <span><span>E[X]=E[<span>∑3<span>i=1</span></span><span>Xi</span>]=<span>∑3<span>i=1</span></span>E[<span>Xi</span>]=<span>∑3<span>i=1</span></span>p=3p=1.8</span><span>E[X]=E[<span>∑<span>i=1</span>3</span><span>Xi</span>]=<span>∑<span>i=1</span>3</span>E[<span>Xi</span>]=<span>∑<span>i=1</span>3</span>p=3p=1.8</span></span>

So, <span><span>p=0.6</span><span>p=0.6</span></span>, and <span><span>P{X=3}=<span>0.63</span></span><span>P{X=3}=<span>0.63</span></span></span>

I thought what I did was sound, but the textbook says the answer to (a) is <span>0.60.6</span> and (b) is <span>00</span>.

Their reasoning (for (a)) is as follows:

3 0
3 years ago
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