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Marta_Voda [28]
4 years ago
7

A car moves at a constant speed of 50 miles per hour. How long does it take the car to go 200 miles?

Mathematics
1 answer:
Irina-Kira [14]4 years ago
3 0

Answer: 4 hours

Step-by-step explanation: If you take 50 times 4 it will get you 200. Another way to look at it is the car is going 50 miles per hour, so in one hour the car has gone 50 miles, in two hours it’s gone 100, three hours it’s gone 150, so in four hours it’s gone 200 miles

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The set of points (1, 3), (3, 5), (4, 7) is collinear. ture or false
Mekhanik [1.2K]
(1,3)(3,5)
slope = (5-3) / (3-1) = 2/2 = 1

(3,5)(4,7)
slope = (7-5) / (4-3) = 2/1 = 2

False....they are not collinear because they have different slopes and do not lie on the same line
3 0
3 years ago
2) An $80 text book was on sale for $49.60 at the used book store. By
nadya68 [22]

Answer:

38%

Step-by-step explanation:

Original price = $ 80

Price after reduction = $ 49.60

Reduction = 80 - 49.60  = $30.40

Percentage of decrease = \frac{reduction price}{original price}*100

                                         = \frac{30.40}{80}*100\\\\=\frac{3040}{80}

                                          =  38%

3 0
3 years ago
Read 2 more answers
Identify which of the following functions are eigenfunctions of the operator d/dx: (a) eikx, (b) cos kx, (c) k, (d) kx, (e) e−ax
grigory [225]

Answer: Identify which of the following functions are eigenfunctions of the operator d/dx: (a) eikx, (b) cos kx, (c) k, (d) kx, (e) e−ax2

Step-by-step explanation: First, we going to apply the operator derivate to each item. Remember that  a function f is an eigenfunction of D if it satisfies the equation

Df=λf, where  λ is a scalar.

a) D(eikx)/dx= ik*eikx, then the function is a eigenfunction and the eingenvalue is ik.

b) D(cos kx)/dx= -ksen kx, then the funcion is not a eigenfunction.

c)  D(k)/dx=0, then the funcion is not a eigenfunction.

d)  D(kx)/dx=k, then the funcion is not a eigenfunction.

e)  D(e-ax2)/dx= -2ax*e-ax2, then the function is a eigenfunction and the eingenvalue is -2ax

7 0
4 years ago
Simplify this expression. (2-5√6)*3√2
gregori [183]

Answer: 6√2 - 30√3

Step-by-step explanation:

(2-5√6) x 3√2

6√2 - 15√12

6√2 - 30√3

3 0
4 years ago
Come on plz tell me someone is awake
VladimirAG [237]

Answer:

I am

Step-by-step explanation:

1500

4 0
3 years ago
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