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MakcuM [25]
3 years ago
11

Find parametric equation of a line with a slope of -2 and passes through (-10,-20)

Mathematics
1 answer:
rosijanka [135]3 years ago
7 0
y- y_{0} =m(x- x_{0} ) \\ m= \frac{y_{1}- y_{0}}{x_{1}- x_{0} }  \\ y-(-20)= (-2)(x-(-10)) \\ y+20=-2x-20 \\ y=-2x-40
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HELP ASAP WILL GIVE BRAINLIEST
Alona [7]

Answer:

y=2x^{2} -7x-4

three linear equations

c=-4 ;4a+b=1 ; 9=a-b

Step-by-step explanation:

Simply assume a standard parabola equation y=ax^{2} +bx +c

(here a, b, c are three independent variables)

Three coordinates as shown in graph are (0,4), (4,0) ,(-1,5)

Now put these points in the equation of parabola and get three linear equations.

[1] c=-4

[2] 4a+b=1

[3] 9=a-b

 Now substitute value of a from equation 2 into 3 in terms of b

 a=  \frac{1-b}{4}

 9=\frac{1-b}{4}-b

 b=-7

 a=2

y=2x^{2} -7x-4

6 0
3 years ago
How can you find the value of n in this equation?
lesya692 [45]
The answer would be n=37 because…
40+n=77
subtract 40 on both sides, cancelling it out on the left side and 77-40=37 so:
n=37
4 0
3 years ago
Read 2 more answers
Consider the following three points.(-5,2), (0,6), (6,4)Step 3 of 3: Determine whether the three points are collinear or not col
Anni [7]

Step 1

Collinear points are a set of three or more points that exist on the same straight line. Collinear points may exist on different planes but not on different lines.

Step 2

Graph the points; (-5,2),(0,6),(6,4)

Step 3

Conclude based on step 2

Since the points are not a straight line, we can conclude that the 3 points are not collinear.

3 0
1 year ago
Which expression is equivalent to (5^-2) (5^-1)​
Alexus [3.1K]

Answer:

C) \frac{1}{125}

Step-by-step explanation:

on edg

6 0
3 years ago
The Carr School Band purchases pizza and drinks for their end-of-year celebration. Each pizza costs $10 and each drink costs $2.
Advocard [28]

Answer:

4n + 100 = C

7n = C  

by elimination 7n - 4n - 100 = 0

3n = 100

n = 100/3 (33.33)

*need to sell 34 pizzas

n= number of pizzas

c= cost

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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