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ch4aika [34]
3 years ago
9

What is the arc length if

Mathematics
1 answer:
dem82 [27]3 years ago
6 0

Answer:

A. 8π / 3

Step-by-step explanation:

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Evaluate 7w -14 for w = 9
ipn [44]

Answer:

49 would be the answer

Step-by-step explanation:

7x9-14

7x9 = 63

63-14 = 49

3 0
3 years ago
Read 2 more answers
Substitute for y=4x-1;y=2x-5
konstantin123 [22]
<span>y=4x−1;y=2x−5
Step: Solve y=4x−1 for y:
Step: Substitute 4x−1 for y in y=2x−5:
y=2x−5
4x−1=2x−5
4x−1+−2x=2x−5+−2x(Add -2x to both sides)
2x−1=−5
2x−1+1=−5+1(Add 1 to both sides)
2x=−4
2x/2=−4/2(Divide both sides by 2)
x=−2
Step: Substitute−2 for x in y=4x−1:
y=4x−1
y=(4)(−2)−1
y=−9(Simplify both sides of the equation)
<u>Answer:</u>y=−9 and x=−2</span>
6 0
4 years ago
Read 2 more answers
A football match started by 10.25am and ended by 1.35pm. how long did it last?​
Setler79 [48]

Answer:

The match last for 3 hours and 10 minutes.

Step-by-step explanation:

Match started at 10.25 am

Match ended at 1.35 pm

We need to find how long did the match last.

Minutes between 10.25 am to 11 am = 35 minutes

Minutes between 1 pm to 1.35 pm = 35 minutes

Time between 11 am to 1 pm = 2 hours

Time between 10.25 am and 1.35 pm is :

T = 2 hours 70 minutes

But 1 hour = 60 minutes

T = 2 hours (60+10) minutes

<em><u>T = 3 hours 10 minutes</u></em>

<em>It means the match last for 3 hours and 10 minutes.</em>

4 0
3 years ago
Each algorithm is applied to a group of 52 sample problems. The new algorithm completes the sample problems with a mean time of
dem82 [27]

Answer:

Therefore we fail to reject the Null hypothesis H_0

Because the is no sufficient evidence to support the claim of the alternative hypothesis H_a

Step-by-step explanation:

From the question we are told that

Sample size n_1 =52

Mean time 1 \=x_1=24.04\ hours

Mean time 2 \=x_2=24.52\ hours

Standard deviation \partial _1=5.769

Standard deviation \partial _2=5.556

Level of significance 0.05

The null hypothesis is H_o: \mu_1=\mu_2

Alternative hypothesis H_a: \mu_1

Generally the test statistics is mathematically represented as

      Z= \frac{\=x_1-\=x_2}{\sqrt{\frac{\sigma_1^2}{n_1}+\frac{\sigma_2^2}{n_2}}}

     Z= \frac{24.04-24.52}{\sqrt{\frac{5.769^2}{52}+\frac{5.5562^2}{52}}}

     Z= -0.4321583379

     Z= -0.43

From Table the Z-critical value at \alpha =0.05\ is\ -1.6449

Therefore

Zcal> Zcritical

(-0.43)=(-1.645)

Generally we fail to reject the null hypothesis H_0 at \alpha  = 0.05

Therefore we fail to reject theH_0

Because the is no sufficient evidence to support the claim of H_a

5 0
3 years ago
Here are the chorus datz: {0, 10, 10, 20, 20, 20, 20,30, 30, 40) What is the mean?
sergeinik [125]

Answer:

7 is 20

8 is 40

Step-by-step explanation:

Mean is the total of all the numbers divided by the amount of numbers

5 0
3 years ago
Read 2 more answers
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