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zloy xaker [14]
2 years ago
6

A driver spent 45minutes to cover a distance of 120km. what is the speed of the driver in km per hour.

Mathematics
1 answer:
drek231 [11]2 years ago
4 0

Answer:

  • The speed is 160 km /h

Step-by-step explanation:

A driver spent 45minutes to cover a distance of 120km

Convert minutes to hour

  • 45 min = 45 /60 hr = 3/4 hr

Use the distance equation

  • d = ts

Find the speed

  • s = d/t

Substitute the distance and time value and find the value of speed

  • s = 120 / (3/4) = 120 * 4/3 = 160 km /h
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Determine if the expression 9x^-2 is a polynomial or not. If it is a polynomial, state
Andrej [43]

Answer:

9x⁻²  is not a polynomial

Step-by-step explanation:

A polynomial function is a function that involves non-negative integer powers of x such as a quadratic, cubic etc.

A polynomial is a function written in the form of ;

f{x} =aₙxⁿ+aₙ₋₁xⁿ⁻¹+-------+a₂x²+a₁x+a₀

The degree of a polynomial is the highest power of x in the expression

9x⁻² ----in this case, the power is negative thus this is not a polynomial.

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2 years ago
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Five men build a wall in 10 days how long will it take 10 men​
butalik [34]

Answer:

5 Days ....thats easy....

Hope this answer is correct ..

Have a nice day ahead

5 0
3 years ago
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The manager of a department store uses the given function to model the monthly opening inventory of down comforters at the store
tangare [24]

Answer: d(x)=-750x^2-3750x-10500


Step-by-step explanation:

Given: The manager of a department store uses the given function to model the monthly opening inventory of down comforters at the store, in dollars, where x represents the number of months from September.

d(x)=-750(x^2-5x-14)

To rewrite this hat reveals the store's opening inventory of down comforters in the month of September, multiply -750 on the bracket, we get

d(x)=-750x^2-3750x-10500

6 0
2 years ago
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HELP PLEASEEEEEEEEEeeeee
maks197457 [2]
Might have to experiment a bit to choose the right answer.

In A, the first term is 456 and the common difference is 10.  Each time we have a new term, the next one is the same except that 10 is added.

Suppose n were 1000.  Then we'd have 456 + (1000)(10) = 10456

In B, the first term is 5 and the common ratio is 3.  From 5 we get 15 by mult. 5 by 3.  Similarly, from 135 we get 405 by mult. 135 by 3.  This is a geom. series with first term 5 and common ratio 3.   a_n = a_0*(3)^(n-1).
So if n were to reach 1000, the 1000th term would be 5*3^999, which is a very large number, certainly more than the 10456 you'd reach in A, above.

Can you now examine C and D in the same manner, and then choose the greatest final value?  Safe to continue using n = 1000.





3 0
3 years ago
Given the following acceleration function of an object moving along a line, find the position function with the given initial ve
Nezavi [6.7K]

Answer:

Position function is s(t)=-12t^2

Step-by-step explanation:

Given a(t)=-24, since velocity is the antiderivative of acceleration, then v(t)=-24t.

Also, since position is the antiderivative of velocity, then s(t)=-12t^2.

5 0
2 years ago
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