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inessss [21]
3 years ago
8

Suppose that y varies directly with x. Given x=2.5 when y=100. Find y when x = 3

Mathematics
1 answer:
sergeinik [125]3 years ago
3 0

Answer

y=120

Step-by-step explanation:

2.5 ->100

3 -> y

y=(3*100)/2.5

y=120

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Answer:

B. Combination: Number of ways = 15

Step-by-step explanation:

2 winners are to be chosen out of 6 people participating in the raffle drawing. In this case the order of selection does not matter, therefore, this situation involves combinations

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^{n}C_{r}=\frac{n!}{r!(n-r)!}

In this case n = 6 and r = 2. Using these values, we get:

^{6}C_{2}=\frac{6!}{2! \times (6-2)!} \\\\ ^{6}C_{2}= \frac{6!}{2! \times 4!}\\\\ ^{6}C_{2}=\frac{6 \times 5 \times 4!}{2 \times 4!}\\\\ ^{6}C_{2}= \frac{30}{2}\\\\ ^{6}C_{2}= 15

Thus, there are 15 ways to chose the winners. So, option B gives the correct answer.

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3 years ago
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Need help parabola and its vertex
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y + 13 = 2(x - 1)^2

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substitute y for 0, since x-intercepts occur on the x-axis, or the line y = 0 

0 + 13 = 2(x - 1)^2

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13 = 2(x^2 - 2x + 1)[tex]\\[tex]13 = 2x^2 - 4x + 2

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use the quadratic equation (can't type it out on brainly, if you don't know, look it up)

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Step-by-step explanation:

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