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marshall27 [118]
3 years ago
5

If y = kx, what is the value of k if y = 20 and x = 0.4? A)5 B)8 C)9.6 D)50

Mathematics
2 answers:
lara31 [8.8K]3 years ago
7 0

Given expression :

  • y = kx

let's plug the value of x as 0.4 and y as 20 in the given equation :

  • 20 = 0.4k

  • k = 20 ÷ 0.4

  • k = 50

correct choice - D. 50

JulsSmile [24]3 years ago
5 0

\\ \sf\longmapsto y=kx

\\ \sf\longmapsto k=\dfrac{y}{x}

  • put values

\\ \sf\longmapsto k=\dfrac{20}{0.4}

\\ \sf\longmapsto k=50

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A bowl has 8 green grapes and 15 red grapes. Henry randomly chooses a grape, eats it, and then chooses another grape....
frosja888 [35]

Answer:

About 41.5%

Step-by-step explanation:

<em>Given:</em>

<em>A bowl has 8 green grapes and 15 red grapes. Henry randomly chooses a grape, eats it, and then chooses another grape.</em>

<em>To Find:</em>

<em>What is the probability that both grapes are red?</em>

<em>Answer choices:</em>

<em>about 39.7%</em>

<em>about 41.5%</em>

<em>about 42.5%</em>

<em>about 44.5%</em>

<em>Solution:</em>

<em>Since, there are 8 green grapes and 15 red grapes, the total number of grapes is 23 .</em>

<em>As the red grapes are 15..</em>

<em>Thus,</em>

<em>The probability of choosing a red grape the first time is 15/23.</em>

<em>Because out of the total 23 grapes only 15 were red grape.</em>

<em>The probability of choosing the red grape the second time will be 14/22. Because the number of red grapes has already decreased by one and so is the total number of grapes after first choice</em>

<em>Hence, the probability of choosing or eating two red grapes will be :</em>

<em>15/23×14/22</em>

<em>=105/253</em>

<em>=0.415</em>

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