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hammer [34]
3 years ago
12

A runner runs a distance of 350 metres in a time of 50 seconds. What is his average speed?

Mathematics
1 answer:
rodikova [14]3 years ago
5 0

Answer:

Average speed = <em>7</em><em> </em><em>metre</em><em> </em><em>per</em><em> </em><em>second</em>

Step-by-step explanation:

Average speed ( v ) = distance / time

=》v = 350 / 50

=》v = 7

so, average speed = 7 m / sec

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2 years ago
Which of the following expressions is equivalent to the expression?
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Answer should be C! Have a great day!
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What is the coefficient of the x5y5-term in the binomial expansion of (2x – 3y)10? 10C5(2)5(3)5 10C5(2)5(–3)5 –10C5(2)5(–3)5 10C
butalik [34]

ANSWER

10C_5(2)^{5}( - 3)^5

EXPLANATION

The given binomial expansion is:

{(2x - 3y)}^{10}

Compare this to

{(a + b)}^{n}

we have a=2x , b=-3y and n=10

We want to find the coefficient of the term

{x}^{5}  {y}^{5}

This implies that, r=5.

The terms in the expansion can be obtained using

T_{r+1}=nC_ra^{n-r}b^r

We substitute the given values to obtain;

T_{5+1}=10C_5(2x)^{10-5}(  - 3y)^5

T_{6}=10C_5(2x)^{5}(3y)^5

T_{6}=10C_5(2)^{5}( - 3)^5 {x}^{5}  {y}^{5}

Hence the coefficient is;

10C_5(2)^{5}( - 3)^5

5 0
3 years ago
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creativ13 [48]

The Price of Car A rounded to the Nearest £100 is £12400

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The Price of Car C rounded to the Nearest £100 is £14600

Difference between the Rounded Price and Original Price of Car A :

⇒ (£12400 - £12380) = £20

Difference between the Rounded Price and Original Price of Car B :

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Difference between the Rounded Price and Original Price of Car C :

⇒ (£14600 - £14580) = £20

From the above, We can Notice that :

The Price of Car B changes by the greatest amount.

4 0
3 years ago
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