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nexus9112 [7]
3 years ago
7

(((Helppppppp Meeeeeee plzzzz))

Mathematics
1 answer:
erastova [34]3 years ago
5 0
Here for you. 
Happy new year.

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》》what is democratic country?~~​
nika2105 [10]

Answer:

A democratic country has a system of government in which the people have the power to participate in decision-making. ... In some democracies citizens help make decisions directly by voting on laws and policy proposals (direct democracy).

8 0
2 years ago
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What is seen in the middle of March and April that can’t be seen at the beginning or end of either month?
Troyanec [42]

Answer:

That I have no idea what it is. sorry

Step-by-step explanation:

7 0
3 years ago
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What are the zeros of the parabola whose equation is y = x2 + 8x + 15
Sedbober [7]

9514 1404 393

Answer:

  (1)  -5 and -3

Step-by-step explanation:

Descarte's rule of signs tells you the lack of sign changes among the coefficients means there are <em>no positive real roots</em>. That eliminates all answer choices except the first one.

__

If you want to go to the trouble, you can factor the equation:

  y = (x +3)(x +5)

These factors are zero when x = -5 and x = -3.

6 0
2 years ago
A plane flew 360km in 3 hrs when flying with the wind.With no change in the wind,the return trip took 4 hrs.Find the speed of th
morpeh [17]
Speed of the plane: 250 mph
Speed of the wind: 50 mph
Explanation:
Let p = the speed of the plane
and w = the speed of the wind
It takes the plane 3 hours to go 600 miles when against the headwind and 2 hours to go 600 miles with the headwind. So we set up a system of equations.
600
m
i
3
h
r
=
p
−
w
600
m
i
2
h
r
=
p
+
w
Solving for the left sides we get:
200mph = p - w
300mph = p + w
Now solve for one variable in either equation. I'll solve for x in the first equation:
200mph = p - w
Add w to both sides:
p = 200mph + w
Now we can substitute the x that we found in the first equation into the second equation so we can solve for w:
300mph = (200mph + w) + w
Combine like terms:
300mph = 200mph + 2w
Subtract 200mph on both sides:
100mph = 2w
Divide by 2:
50mph = w
So the speed of the wind is 50mph.
Now plug the value we just found back in to either equation to find the speed of the plane, I'll plug it into the first equation:
200mph = p - 50mph
Add 50mph on both sides:
250mph = p
So the speed of the plane in still air is 250mph.
6 0
2 years ago
A city has a population of 38802500 people. Estimate this population to the nearest ten million
Ierofanga [76]

Answer:

40,000,000 or 40 million

Step-by-step explanation:

4 0
3 years ago
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