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arlik [135]
3 years ago
15

4 students were scheduled to give book reports in one hour. after the 1st report, 2/3 hour remained. the next two reports too 1/

6 hour and 1/4 hour. what fraction of the hour remained?
Mathematics
1 answer:
VladimirAG [237]3 years ago
4 0
After the first, we have 2/3 left, the second and third took 1/6 and 1/4, or 5/12 (1/6+1/4=2/12+3/12=(2+3)/12=5/12). Now, we just subtract 5/12 from 2/3, so 2/3-5/12=8/12-5/12=(8-5)/12=3/12=1/4. This means we have 1/4 of an hour left.
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Suppose that x and y vary inversely, and x = 7 and y=11. Which function models the inverse variation?Answers:Y=1.57xY=77/xY=4/xY
sdas [7]

Answer:

Y=77/x

Explanation:

Y varies inversely with x meaning

y\propto\frac{1}{x}

adding a proportionality constant gives

y\propto\frac{k}{x}

Now, we are told that y = 11 and x = 7; therefore, the above gives

11=\frac{k}{7}

Solving for k gives

k=77

Therefore, the function that models the inverse variation is

y=\frac{77}{x}

which is our answer!

5 0
1 year ago
Identify the value of c in the following quadratic function f (x) = -2x^2+ 3x – 4
Hitman42 [59]

Answer:

-4

Step-by-step explanation:

Given function

f(x) = -2x² + 3x - 4

Comparing with ax² + bx + c We get

c = - 4

Hope it will help :)❤

5 0
3 years ago
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Ugo [173]
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8 0
3 years ago
Find the y-intercept of f(x) = 3x^2 + 6x
Step2247 [10]

Answ3r:

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4 0
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8.25 × 10–4 in standard form.
Elanso [62]

The 10^-4 means that the decimal point is 4 places to the left of where it is in 8.25 (if the exponent was positive the decimal point would be to the right). If you move the decimal point 4 places to the left you get an answer of 0.000825 which is 8.25 * 10^-4 in standard form.

7 0
3 years ago
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