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jeka94
3 years ago
6

In a class of 30 high school

Mathematics
2 answers:
Valentin [98]3 years ago
8 0

Answer:

70 percent

Step-by-step explanation:

Naddika [18.5K]3 years ago
4 0

Answer:

70%

Step-by-step explanation:

you take the number of students who drive Divide by the number of high school students.

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Determine the value of a, b, and c for the quadratic equation: 4x2- 8x = 3
Rufina [12.5K]

Answer:

B. a = 4, b = -8, c = -3

Step-by-step explanation:

The quadratic equation given is:

4x^2- 8x = 3

The general form of a quadratic equation is given as:

ax^2 + bx +c = 0

Let us put the given equation in this form and then compare with the general form of the quadratic equation.

4x^2- 8x = 3\\\\4x^2 - 8x - 3 = 0

Therefore, by comparing:

a = 4

b = -8

c = -3

The correct option is B

4 0
3 years ago
Petes boat can travel 48 miles upstream in 4 hours. The return trip takes 3 hours. Find the speed of the boat in still water and
tankabanditka [31]
So... hmm bear in mind, when the boat goes upstream, it goes against the stream, so, if the boat has speed rate of say "b", and the stream has a rate of "r", then the speed going up is b - r, the boat's rate minus the streams, because the stream is subtracting speed as it goes up

going downstream is a bit different, the stream speed is "added" to boat's
so the boat is really going faster, is going b + r

notice, the distance is the same, upstream as well as downstream
thus   \bf \begin{cases}
b=\textit{rate of the boat}\\
r=\textit{rate of the river}
\end{cases}\qquad thus
\\\\\\

\begin{array}{lccclll}
&distance&rate&time(hrs)\\
&----&----&----\\
upstream&48&b-r&4\\
downstream&48&b+4&3
\end{array}
\\\\\\

\begin{cases}
48=(b-r)(4)\to 48=4b-4r\\\\
\frac{48-4b}{-4}=r\\
--------------\\
48=(b+r)(3)\\
-----------------------------\\\\
thus\\\\
48=\left[ b+\left(\boxed{\frac{48-4b}{-4}}\right) \right] (3)
\end{cases}

solve for "r", to see what the stream's rate is

what about the boat's? well, just plug the value for "r" on either equation and solve for "b"
5 0
3 years ago
If the mean is 2.7 determine the value of x and y
Allisa [31]

Answer:

13.5 and 13.5

Step-by-step explanation:

5 0
3 years ago
Please HELP<br><br> PICTURE SHOWN
Umnica [9.8K]

Answer:

x<−3+√1012 or x>−3−√1012

Step-by-step explanation:

6 0
3 years ago
3. Niko ran 4 miles on his first school day off. Niko's ankle's hurt
Yanka [14]

Answer:

6 miles

Step-by-step explanation:

3 0
3 years ago
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