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maks197457 [2]
3 years ago
5

How do you do this and what’s the answer ?

Mathematics
1 answer:
Dmitrij [34]3 years ago
7 0

Answer:

A. y=2

x+y=2.5

b.  x=2 or 5

y=2 or 5

I don't know which on equals 2 and which equals 5, but 5 and 2 are the answers

Step-by-step explanation:

a. 2x0.5=1

b. 2+5=7 and 2x5=10

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Get the x terms by themselves on one side and a constant on the other side of the equal sign...

4x^2-8x=1  make the leading coefficient equal to one...

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x^2-2x+1=1+1/4

x^2-2x+1=5/4  now the left side is a perfect square...

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3 years ago
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What is the common difference for this arithmetic sequence?
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Common difference of the arithmetic sequence, is

d=a_{n} - a_{n-1}

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If x2 = 40, what is the value of x?
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If a hexagon is worth 5 and a triangle is worth 3, what is a circle
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Answer:

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Call pentagon p, circle c and triangle t

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Find the point on the line y = 2x + 3 that is closest to the origin.
ch4aika [34]
1)We have to make a line perpendicular to y=2x+3, passing through the point (0,0).

y=2x+3   
m=solpe=2

The slope of the line perpedicular to y=2x+3 is m´
m´=-1/m
m´=-1/2

Point slope form:
y-y₀=m(x-x₀)
(0,0)
m=-1/2

y-0=-1/2(x-0)
y=-x/2

Therefore, the line perpendicular to y=2x+3 is y=-x/2.

2)The point on the line y=2x+3 tha is closest to the origin is the point of intersection of the two lines.

y=2x+3
y=-x/2

We can solve this system of equations by equalization method.
2x+3=-x/2
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y=-x/2
y=-(-6/5)/2=6/10=3/5    (=0,6)

Therefore: the point of the line y=2x+3 that is closest to the origin is:
 (-1.2 , 0.6)

3 0
3 years ago
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