Mathematics: Expression A: (2k + 8) + (5k + 10) Expression B: 76 + 18 Are the two expressions equivalent? A. No, because for k = 3, the value of Expression A is 29 and the value of Expression B is 39. B. Yes, because for k= 3, the value of Expression A is 75 and the value of Expression B is 75. C. Yes, because for k= 3, the value of Expression A is 39 and the value of Expression B is 39. D. No, because for k= 3, the value of Expression A is 39 and the value of Expression B is 75.

Expression A: (2k + 8) + (5k + 10) Expression B:

Ответ:

xbeatdroperzx

18.05.2021

Mathematics

k = 3

Expression A:

(2k + 8) + (5k + 10) = 2k + 8 + 5k + 10 = 7k + 18 = 7*3 + 18 = 21 + 18 = 39

Expression B:

76 + 18= 94

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Ответ:

diggy72

21.07.2021

Mathematics

12.4%

Step-by-step explanation:

The results from the random sample counts 124 from a total of 1000 people that wear contact lenses. This means $\frac{124}{1000} =0.124=12.4\%$ is the percentageof the people in the sample that wear contact lenses.Because it is a random sample, it is suppose to reflect the behavior of the total population. Then we can expect or predict similar percentage of Americans wearing contact lenses (12.4%).

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