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Dafna11 [192]
3 years ago
15

X-y=3

Mathematics
1 answer:
ycow [4]3 years ago
7 0
<h3><u>Q</u><u>u</u><u>e</u><u>s</u><u>t</u><u>i</u><u>o</u><u>n</u>:-</h3>

If x - y = 3

Work out the value of 5(x - y)

<h3><u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u>:-</h3>

x - y = 3 ( Given )

\therefore 5(x - y) = 5 × 3 = 15 [ as x - y = 3 ]

_____________________________________

<h3><u>Q</u><u>u</u><u>e</u><u>s</u><u>t</u><u>i</u><u>o</u><u>n</u>:-</h3>

If x - y = 3

Work out the value of 2x - 2y

<h3><u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u>:-</h3>

x - y = 3 ( Given )

\therefore 2x - 2y = 2(x - y) = 2 × 3 = 6 [ as x - y = 3 ]

_____________________________________

<h3><u>Q</u><u>u</u><u>e</u><u>s</u><u>t</u><u>i</u><u>o</u><u>n</u>:-</h3>

If x - y = 3

Work out the value of y - x

<h3><u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u>:-</h3>

x - y = 3 ( Given )

\therefore y - x = -3 [ as x - y = 3 ]

_____________________________________

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Identical prizes are to be given to two winners from a group of 12 contestants. What counting formula would you use to determine
mr Goodwill [35]

We will use a combination formula to determine how many ways the prizes could be given out.

In mathematics, a combination is a way of selecting items from a collection where the order of selection does not matter. Suppose we have a set of three numbers P, Q and R. Then in how many ways we can select two numbers from each set, is defined by combination.

The combination is defined as “An arrangement of objects where the order in which the objects are selected does not matter.” The combination means “Selection of things”, where the order of things has no importance.

The formulas nCk is popularly known as counting formula.

Learn more about Combination:

brainly.com/question/4313883

#SPJ4

5 0
2 years ago
SOMEONE PLEASE HELP 100 POINTS AND BRAINLIEST AND 5 STAR RATING! PLEASE HELP! :)
weqwewe [10]

1 cm            3 cm

---------   =  ---------

3 in               x inches


The ratio has to stay in the same order  cm on top, inches on the bottom


Choice C

4 0
3 years ago
Is 4m equal to 400dm
erica [24]
It is not.

400 decimeters = 4,000 cm

4,000 cm = 40 m
6 0
3 years ago
Rebotar Inc.makes basketballs.Their fixed costs are $3,450.
melomori [17]

Answer:

<em>Since the profit is positive, Rebotar not only broke even, they had earnings.</em>

Step-by-step explanation:

<u>Function Modeling</u>

The costs, incomes, and profits of Rebotar Inc. can be modeled by means of the appropriate function according to known conditions of the market.

It's known their fixed costs are $3,450 and their variable costs are $12 per basketball produced and sold. Thus, the total cost of Rebotar is:

C(x) = 12x + 3,450

Where x is the number of basketballs sold.

It's also known each basketball is sold at $25, thus the revenue (income) function is:

R(x) = 25x

The profit function is the difference between the costs and revenue:

P(x) = 25x - (12x + 3,450)

Operating:

P(x) = 25x - 12x - 3,450

P(x) = 13x - 3,450

If x=300 basketballs are sold, the profits are:

P(300) = 13(300) - 3,450

P(300) = 3,900 - 3,450

P(300) = 450

Since the profit is positive, Rebotar not only broke even, they had earnings.

8 0
3 years ago
The constant of proportionality is always the point ____________, where kis the constant of proportionality.
spayn [35]

Answer:

The constant of proportionality is always the point (x, k * f (x), where k is the constant of proportionality.

Step-by-step explanation:

Let's take as example a linear function of the form: y = kx.

Where, k is the constant of proportionality.

Therefore, the proportionality constant is the point: (x, kx)

Generically it is always the point: (x, k * f (x)

Where, f (x) is a function proportional to x. The constant of proportionality is always the point (x, k * f (x)), where k is the constant of proportionality.

8 0
2 years ago
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