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ohaa [14]
2 years ago
15

5 x 3 + 2 x 3 = 15 + __________

Mathematics
2 answers:
kvv77 [185]2 years ago
6 0
5×3=15+2=17×3=51. that us all I understand I do not understand the =15+_________
lorasvet [3.4K]2 years ago
5 0
The anwser is going to be 6
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A teacher asked 100 students in the school band to vote on the color they wanted for their uniforms. How many more students chos
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D.)
Explanation: subtract orange from red orange=35 red=25 35-25=10 hope this helps have a great day!
4 0
2 years ago
The 7th term of an A.p is -4. If the common difference is-5, find the 6th term​
Lubov Fominskaja [6]

Answer:

Step-by-step explanation:

a₆ = a₇+(6-7)d = -4 -(-5) =1

7 0
2 years ago
What is the measure for angle f
nordsb [41]

what do you mean? what is the measure of f? there isnt a problem or graph that i can see to go off of

8 0
3 years ago
2/3 x -6 =9<br><br>22 1/2<br>10<br>-22 1/2<br>25<br><br><br><br><br><br><br><br><br>​
Pavel [41]

Answer:

22 1/2

Step-by-step explanation:

2/3x=15

x=15/2/3

x=15*3/2

x=45/2

Therefore, x=22 1/2

5 0
3 years ago
A study of 420,076 cell phone users found that 131 of them developed cancer of the brain or nervous system. Prior to this study
Keith_Richards [23]

Answer:

a) 95% Confidence interval = (0.026%, 0.037%) to 3 d.p

b) The result of the 95% confidence interval does not agree with the previous rate of such cancer because the value 0.0224% does not lie within this confidence interval obtained.

Step-by-step explanation:

Confidence Interval for the population proportion is basically an interval of range of values where the true population proportion can be found with a certain level of confidence.

Mathematically,

Confidence Interval = (Sample proportion) ± (Margin of error)

Sample proportion = (131/420076) = 0.0003118483 = 0.0312%

Margin of Error is the width of the confidence interval about the mean.

It is given mathematically as,

Margin of Error = (Critical value) × (standard Error)

Critical value at 95% confidence interval for sample size of 420,076 is obtained from the z-tables because the sample size is large enough for the properties of the sample to approximate the population properties.

Critical value = 1.960 (from the z-tables)

Standard error = σₓ = √[p(1-p)/n]

n = sample size = 420,076

σₓ = √(0.0003118×0.999688/420076) = 0.0000272421 = 0.0000272

95% Confidence Interval = (Sample proportion) ± [(Critical value) × (standard Error)]

CI = 0.000312 ± (1.96 × 0.0000272)

CI = 0.000312 ± 0.0000534

95% CI = (0.0002586055, 0.0003653945)

95% Confidence interval = (0.000259, 0.000365)

95% Confidence interval = (0.0259%, 0.0365%) = (0.026%, 0.037%) to 3 d.p

b) The result of the 95% confidence interval does not agree with the previous rate of such cancer because the value 0.0224% does not lie within this confidence interval obtained.

Hope this Helps!!!

7 0
2 years ago
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