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aivan3 [116]
3 years ago
12

a marathon runner completes a 42km course at an average speed of 7km/h calculate the time taken to complete the course.

Mathematics
1 answer:
Ahat [919]3 years ago
5 0

Answer:

6 hours

Step-by-step explanation:

42/7=6h

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Is this right, can someone please explain so?
Orlov [11]
You have to turn them in to the lowest common denominator

6 0
3 years ago
Someone, please help i don't understand this
miv72 [106K]

Answer

62

5.3

65

5.8

2.5

Step-by-step explanation:

FOr the first one we have the opposite and adjacent side, so we'll use TOA

let x= angle

tan(x)=4.7/2.5

x=61.99 or 62

2.) for this one we can just use pathagoryeous thereom

2.5²+4.7²=c²

28.34=c²

c=5.323

3.) For this one we know that the angles in a traingle must add to 180

let x= missing angle

25+90+x=180

x=65

4.) For this one we have the adjacent side but need the hypotonouse

we will therefore use CAH

cos(25)=5.3/x

5.3/(cos(25))=x

x=5.8

5.) For this one we will just use the pathagoryeous to solve for the missing side

a²+5.3²=5.8²

a²=6.107

a=2.5

8 0
3 years ago
Explain how a number can be a power of 10
abruzzese [7]

Answer:

A power of 10 is the number 10 multiplied by itself by the number of times indicated by the exponent.When the exponent is greater than o it is followed by zeros

6 0
4 years ago
In constructing a box-and-whisker plot from a data set, which values are at the ends of the box?
I am Lyosha [343]

Answer:  In constructing a box-and-whisker plot from a data set,  the minimum and maximum values are at the ends of the box.


Step-by-step explanation:

A box and whisker plot displays the five measures of data. The five measures summary is the minimum, first quartile, median, third quartile, and maximum. In a box plot, we draw a box from the first quartile to the third quartile.

Therefore, In constructing a box-and-whisker plot from a data set,  the minimum and maximum values are at the ends of the box.

Hence, A is the right option,

8 0
3 years ago
If Tanø =a/b Find the value of sinø+cosø/sinø-cosø
inysia [295]

Answer:

\frac{b+a}{b-a}

Step-by-step explanation:

Tan θ = \frac{perpendicular}{base} = \frac{b}{a}

So, Perpendicular = b, base = a

<em><u>Finding hypotenuse by Pythagorean Theorem:</u></em>

c^2 = a^2+b^2

=> So, <u><em>hypotenuse = c</em></u>

Sin θ = \frac{perpendicular}{hypotenuse}= \frac{b}{c}

Cos θ = \frac{base}{hypotenuse}= \frac{a}{c}

So, <u><em>Now finding </em></u>\frac{sin\theta+cos\theta}{sin\theta-cos\theta}

=> \frac{b}{c} + \frac{a}{c} ÷ \frac{b}{c} - \frac{a}{c}

=> \frac{b+a}{c} ÷ \frac{b-a}{c}

=> \frac{b+a}{c} * \frac{c}{b-a}

=> \frac{b+a}{b-a}

4 0
3 years ago
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