rachis
28.01.2020 •
Mathematics
What are the values of x and y for this system of equations?
2x + y = -1
-x + 3y = 18
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Ответ:
2x+y=-1
-x+3y=18
3y-18=x
2(3y-18)+y=-1
6y-36+y=-1
7y=-1+36
7y=35
y=35/7
y=5
-x+3y=18
-x+3(5)=18
-x+15=18
-x=18-15
-x=3
x=-3
Ответ:
That's the answer to the first half of the problem shown the whole problem is invalid together
Ответ:
See below.
Step-by-step explanation:
Triangle ABC is congruent to triangle DEF (Given)
Angle ACB is congruent to angle ECG. (Vertical angles theorem)
Angle CEG is congruent to angle DEF. (Vertical angles theorem)
Angle DEF is congruent to angle ABC. (Definition of congruent triangles)
Angle CEG is congruent to angle ABC. (Substitution property of equality).
Triangle ABC is similar to triangle GEC. (Angle angle similarity postulate- if two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.)