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vovikov84 [41]
2 years ago
5

I REALLY NEED HELP ON THIS

Mathematics
1 answer:
Studentka2010 [4]2 years ago
3 0

Answer:

It's D. 53.1°

Step-by-step explanation:

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A car travels 2.5 hours in a northerly Direction for 300 KM. what is the speed and velocity
STatiana [176]
Speed is distance traveled per block of time. As an equation, this is 
Speed = distance/time

In your problem, the given distance is 300km, and the time is 2.5 hours.
Plugging into the equation,
Speed = 300km / 2.5 h
Speed = 120 km/h

Velocity is speed <em>and</em> direction. 
The velocity would be 120 km/h north.
4 0
2 years ago
The width of a rectangle is 6 kilometers less than twice its length. if its area is 108 square​ kilometers, find the dimensions
Art [367]
Hi there!

Answer:
length = 9 kilometres
Width = 12 kilometres

Let's solve this problem step by step!
To find our answer we need to set up and solve an equation.

Let the length of the rectangle be represented by x.
The width of the rectangle can therefore be expressed by 2x - 6.

The area of a rectangle can be found by using the formula:
A = width × length

Plug in the data from the formula
A = x (2x - 6).

Simplify using rainbow technique.
x(2x - 6) = 2 {x}^{2} - 6x

Now we've found the simplified expression that expresses the area of the rectangle. Therefore, we can now set up and start solve the equation.

2 {x}^{2} - 6x = 108
Subtract 108

2 {x}^{2} - 6x - 108 = 0
Divide by 2.

{x}^{2} - 3x - 54
(x - 9)(x + 6) = 0
Rule AB = 0, gives A is 0 or B is 0.

x - 9 = 0 \\ x = 9 \\ \\ x + 6 = 0 \\ x = - 6

The length of the rectangle, which was represented by x, must be 9 (since it cannot be a negative number).

Length
x = 9
Width
2x - 6 = 2 \times 9- 6 = 18 - 6 = 12

Answer:
length = 9 kilometres
Width = 12 kilometres

~ Hope this helps you!
6 0
3 years ago
Reason Lena is making a puzzle, she cuts a shape into5. two pieces and rearranges them to make the shape below.Which shape did s
BartSMP [9]
The answer to 5. is D: the square

4 0
3 years ago
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A class is made up of 8 boys and 4 girls. Half of the girls wear glasses. A student is selected at random from the class. What i
Ierofanga [76]

Answer:

1/6

Step-by-step explanation:

The total amount of people 8+4=12

there are 4/2=2 girls with glasses

the probability to chhose a girl with glasses is 2/12=1/6

3 0
2 years ago
What is the value of x in the equation 3x-4y=65 when y=4
vredina [299]
I believe x is equal to 23
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2 years ago
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