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2 years ago

Lucy cycles 8.4km in 18 minutes. Work out her average speed in km/h and explain.

Mathematics

1 answer:

adoni [48]2 years ago

8 0

Answer:

The answer to your question is: 28 km / h

Step-by-step explanation:

Data

distance = 8.4 km

time = 18 min

speed = ? km/h

Process

Convert min to hours

60 min ---------------- 1 h

18 min ---------------- x

x = (18 x 1) / 60

x = 0.3 h

speed = 8.4 / 0.3

speed = 28 km / h

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John and Jessica are selling fruit for a school fundraiser. Customers can buy small boxes of tangerines and large boxes of tange

VARVARA [1.3K]

Answer: Small box: $13; Large box: $16

Step-by-step explanation:

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2 years ago

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Which pair of triangles must be similar? * 1 point Triangles 1 and 2 each have a 50 degree angle. Triangles 3 and 4 are both iso

sergey [27]

Answer:

Triangles 3 and 4 are both isosceles. They each have a 60 degree angle.

This is a similar triangle.

Step-by-step explanation:

Isosceles triangle is one in which two sides are equal.

Similar triangles are triangles which have all corresponding angles equal and which have corresponding sides with the same ratio.

Now the given isosceles triangle both have all three angles equal to 60 degrees which makes them similar triangles.

The other choices given are not similar triangles because

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2 years ago

-10x - y=-5 write in standard form

ololo11 [35]

Answer:

10 x + y = 5

Step-by-step explanation:

Using the formula, write in standard form.

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3 years ago

Leo had $91, which is 7 times as much money as Alison had. How much

NARA [144]

Answer:

$7x=91$

$13.

Step-by-step explanation:

Let x represent money that Alison has.

We have been given that Leo has 7 times as much money as Alison had. So the amount of money that Leo has, would be $7x$ .

We are also told that Leo had $91, so we will equate $7x$ with 91 and solve for x as:

$7x=91$

To solve for x, we will divide both sides by 7:

$\frac{7x}{7}=\frac{91}{7}$

$x=13$

Therefore, Alison has $13.

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2 years ago

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What is not a description of slope?

Gelneren [198K]

Answer:

Option (d) is wrong.

Step-by-step explanation:

Slope is:

rise over run
The rate of change of a line
Change in y over the change in x
<em><u>The ratio of vertical change to the horizontal change. </u></em>

It can be given by mathematically as follows :

$m=\dfrac{y_2-y_1}{x_2-x_1}\\\\\text{and}\\\\m=\dfrac{dy}{dx}$

Hence, the option which is not a description of slope is (d) "the ratio of horizontal change compared to vertical change"

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3 years ago