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Alja [10]
3 years ago
6

Which choices are equations for the coordinates (-2,4) (1,-2)?

Mathematics
1 answer:
DENIUS [597]3 years ago
7 0

\bf (\stackrel{x_1}{-2}~,~\stackrel{y_1}{4})\qquad
(\stackrel{x_2}{1}~,~\stackrel{y_2}{-2})
\\\\\\
slope = m\implies
\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{-2-4}{1-(-2)}\implies \cfrac{-2-4}{1+2}\implies \cfrac{-6}{3}\implies -2
\\\\\\
\stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-4=-2[x-(-2)]\implies y-4=-2(x+2)

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Your team wins 18 medals at a competition. The metals are gold, silver, and bronze in a ratio of 2:4:3. How many of each metal d
Anarel [89]

Answer

Find out the how many of each metal did your team win.

To prove

As given

Your team wins 18 medals at a competition.

The metals are gold, silver, and bronze in a ratio of 2:4:3.

Let us assume that x be the scalar multiple of the gold, silver and bronze medal.

Thus

Number of gold medal = 2x

Number of silver medal = 4x

Number of bronze medal = 3x

Than the equation becomes

2x + 4x + 3x = 18

9x = 18

x = \frac{18}{9}

x = 2

Number of gold medal = 2 × 2

                                      = 4

Number of silver medal = 4 × 2

                                       = 8

Number of bronze medal = 3 × 2

                                           = 6

Therefore the number of gold medal are 4, silver medal are 8, bronze medal are 6.

3 0
3 years ago
What is the value of n in 9x27+2x31-28=n
rosijanka [135]
243 + 62-28 = n
243 + 34 = n
277 = n
n= 277
6 0
3 years ago
Read 2 more answers
Rahul earns 21,000 in 7 months.
tekilochka [14]

Answer:

a _ 12×21000/7 = 36000

b _ 33 × 7 / 21000= 11 months

8 0
2 years ago
Can someone pls help me with this?
Aliun [14]

Answer:

c

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Find two positive numbers whose product is 36 and whose sum is a minimum.
alukav5142 [94]
Let one of the numbers be x. The other number cab then be represented as 36-x (x+36-x = 36).
The product can then be represented as y = x(36-x) or y=36x-x2

The maximum or minimum is always on the axis of symmetry which has the formula x=-b/2a.
In our case, the axis of symmetry is -36/-2, so x=18.

If one number is 18 and the 2 numbers add to 36, the other number is 18 as well.
So the 2 numbers are 18 and 18 and the maximum product is 324,
8 0
3 years ago
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