Help for a gradeeeee...picture attacthed.

Mathematics

1 answer:

elixir [45]3 years ago

4 0

Answer:

that doesn't make sense.

Step-by-step explanation:

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3 years ago

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In the diagram, point X is the centroid. If EX=8, what is the length of XC ?

Phoenix [80]

Answer:

Step-by-step explanation:

If X is the centroid that means that EC is a median along with the other lines that intersect inside the triangle. Medians drawn from a triangle have a special rule; this rule is that all medians have a 2:1 ratio between the different sections of one median. For example, EC is one median with the two sections XC and EX. Therefore XC and EX have a 2:1, with the 2 representing the longer section closest to the vertex. This means that XC is double EX, so to find XC simply double EX measurement, which is 8. So XC must equal 16.

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2 years ago

thelma wants to find the equation of a line that passes through the point (2,2) and is perpendicular to the line y=1/2x+5

d1i1m1o1n [39]

perpendicular slope :

m1 * m2 = -1

1/2 * m2 = -1

m2 = -2

y = -2x + b

2 = -4 +b

b = 6

y = -2x + 6

8 0

3 years ago

Solve the following system of equations x^2+2y^2=59 2x^2+y^2=43

aivan3 [116]

Answer: x = (-3,3), y = (-5,5)

Step-by-step explanation:

Add both of the equations together, for $3x^{2}+3y^{2} = 102$ . Now we can divide both sides by 3, getting $x^2+y^2=34$ . we subtract the first equation from our equation we just got, getting $y^2=25$ y= (5,-5). once we plug that in, we get $50+x^2 = 59$ , $x^2 = 9$ x = (-3,3)