A triangle has an inner angle sum of 180°
you have an angle of 30°, x° and one congruent to the x° one
so 30+x+x=180
2x=150
x=75°
The answer is dilation. The other three are just moving the shape somewhere else, but it keeps the same shape. The dilation changes the size making the two shapes not congruent,
We know: <span>The distribution of multiplication by addition
and that means A is suitable
m*a+n*a= a*(m+n)=(m+n)*a
Have fun</span>
Answer:
r = 7
Step-by-step explanation:
Use the distributive property by multipling the -8 to the 2r and the -8, do the same thing on the other side with the -3.
Afterwards, combine like terms by adding 64 and 6.
Next, add 3r to the left side, I usually choose the number with the variable (the letter) that looks like it will be easier to subtract. This leaves only 21 on the right side.
Next subtract 70 from both sides
Divide -13 by both sides
You should get the answer of r=7
