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Dmitry_Shevchenko [17]
2 years ago
5

4. Janet has 30 classmates in her classroom. 18 of those

Mathematics
1 answer:
boyakko [2]2 years ago
6 0

Answer:

300

Step-by-step explanation:

Let x represent number of girls.

18 girls / 30 students

x girls / 500 students

18/30 = x/500

x = 18/30 x 500

x= 300 girls

Therefore there are approximately 300 girls in the school.

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Help and I will make brainlest
iogann1982 [59]

Answer:

the answer is y=x^2

Step-by-step explanation:

when you graph this is goes through the required points

4 0
2 years ago
Pls help, 20 points!!
klemol [59]

Answer:

(-18,9)

Step-by-step explanation (work shown in picture attached):

1) The first step in solving by substitution is to isolate the y-term in one of the equations if it is not already isolated. Isolate y in the first equation by dividing both sides by -2. This leaves us with the equation y = \frac{-x}{2}

2) Now, substitute \frac{-x}{2} for the y in the second equation. Simplify and isolate x. (You can multiply everything by -2 to get rid of the fraction.) This leaves us with x = -18.

3) We've found the x-value of the solution, -18. Now, substitute -18 for x back into one of the original equations (I chose the first one because it was simple) and isolate y. This gives us y = 9. Thus, in point form, the answer is (-18,9).

7 0
3 years ago
Desmond is rolling a standard six-sided number cube. He plans to roll it 72 times. About how many times would you expect him to
timama [110]
4 times 18 is 72 use a calculator and divide 72 by each number and you’ll find numbers
7 0
3 years ago
QUICKKKK EXPERTS/ACE (and people that know it for sure comment) Brainiest Marked to the first correct answer
Olin [163]
I worked them out separately if I'm correct, then the order is:

x+5y=-2
x+5y=4  These are Inconsistent

y=3x+4
-2x+y=4   These are Consistent independent

3x+y=4
-6x-2y=-8 These are coincident

Inconsistent lines=No solution
Coincident lines=exactly on top of each other
Consistent Independant= Solution, as they cross each other. 

~Hope this helps!

8 0
3 years ago
Mr. Douglas drove 2,482 miles. He spent 42.5 hours in the car driving. What was his average speed for the trip?
riadik2000 [5.3K]

I think you just divide the number of miles by the number of hours he spent driving.

2,482/42.5= 58.4

58mph

6 0
3 years ago
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