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den301095 [7]
2 years ago
6

An algebraic expression for the difference obtained when three times x is subtracted from y

Mathematics
1 answer:
Olin [163]2 years ago
5 0

Answer:

y-3x

Step-by-step explanation:

Because it is subtracted from y that meas the y would be first and 3 times x would be 3x because you do not need a sign because it is a variable

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2050 games will be played in 25 yrs
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Three consecutive vertices of a parallelogram are (– 2, 1); (1, 0) and (4, 3). Find the coordinate of the fourth vertex and find
antiseptic1488 [7]

Answer:

D(1,4) - the fourth vertex, the area is equal to 12

Step-by-step explanation:

A(2,-1), B(1,0),C(4,3), They are consecutive, we need to find the point D, find the midpoint of AC (O)

xo= (xA+xc)/2    x0= (-2+4)/2=1

y0=(yA+yC)/2    y0= (1+3)/2=2

0(1,2)

O is the midpoint of BD, so let's find the vertex D

X0= (xB+xD)/2     1= (1+xD)/2   xD=1

y0= (yB+yD)/2      2= (0+yD)/2    yD=4

D(1,4)

the vector DA is (-2-1, 1-4)= (-3,-3)

the vector DC is (4-1, 3-4)= (3,-1)

The modul of DC is sqrt ((-3)^2+(-3)^2)= 3*sqrt2(the length of the side Dc)

The modul of DA is sqrt (3^2+(-1)^2)= sqrt10(the length of the side DA)

cosD= (-3*3+(-3)(-1))/3*sqrt2*sqrt10=-6/3*2*sqrt5=-1/sqrt5

sinD= sqrt (1- 1/5)=2/ sqrt5

S=3sqrt2*sqrt10*2/sqrt5= 12

6 0
2 years ago
2−1/2n=3n+16<br><br> ​<br><br> n=3n+16
romanna [79]

Answer:

The answer is

n=5 3/5

Step-by-step explanation:

first collect the like terms:

2-1/2n=3n+16

then...

3n-1/2=16-2

==2 1/2n = 14

===n=5 3/5

3 0
3 years ago
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goldenfox [79]
Well there’s two sides of a coin
so divide 58 by 2 to get 29
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3 years ago
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