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Firlakuza [10]
3 years ago
13

If r◼s = 3r + s, find 4◼(2◼1).

Mathematics
1 answer:
eimsori [14]3 years ago
4 0

By definition of ◼, we have

2 ◼ 1 = 3•2 + 1 = 7

4 ◼ (2 ◼ 1) = 4 ◼ 7 = 3•4 + 7 = 19

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A train left a station a station at noon going 40mph. A second train left at 3 p.m. going 60mph. At what time will the second tr
Sati [7]

Here speed of first train is slower than speed of second train. So if they catch up , the distance traveled will be same since they left the same station at different times.

But the time traveled will be different .

Let us say the two trains meet at time t ,

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Distance traveled by first train = 40 t

Since second train is leaving after three hours , so

Distance traveled by second train = 60(t-3)

As discussed earlier, distance traveled will be same, so

40t =60(t-3)

distributing 60 over t-3

40t =60t-180

60t -40t=180

20t =180

t =180/20

t=9

So the second train will meet the first at 9 p.m.

5 0
3 years ago
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What is the range of f(x) = -x^2 + 4, if the domain is {2,0,1}?
gregori [183]
[8,4.5] i think that is right
7 0
3 years ago
CO 5<br> What is the value of tan(60°)?<br> A<br> O<br> 12<br> 30°<br> 3<br> B<br> 60°<br> 6
lukranit [14]

Answer:

<em>√3</em>

Step-by-step explanation:

5 0
2 years ago
I needddd helppp please
Montano1993 [528]

Answer:

X=66°

Step-by-step explanation:

Because it is an isosceles triangle, the 2 missing angles are going to be the same size.

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180-48= 132

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132/2= 66

5 0
3 years ago
What is the value of y in the solution to the following system of equations? 5x − 3y = −11 2x − 6y = −14 −1 0 1 2
Alekssandra [29.7K]
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---------------------- -
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y = 2
5 0
3 years ago
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