He made erron in step 3. He forgot add 4. it should be
-4m + 4m = -32 - 8n + 4n +4
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The two triangles are similar by AAA property ie
Angle Angle Angle property
Let us name the two triangles as ABC and DEF
By observing the figure
mB=mE=90 (right angled triangle)
mA=mD (parallel lines property)
mC=mF (parallel lines property)
Therefore by AAA the two triangles are similar .
The diagram is given below.
PS: All the credits for image goes to Picasso-PSN03
The nearest 10 dollars would be $70.
And 25% of 70 is 17.50
So 17.50 should be correct.
Answer:
15.69% decrease
Step-by-step explanation:
To find the percent change, we take the original price and subtract the new price
2.55 -2.15 = .40
Divide by the original price
.40/2.55
.156862745
Multiply by 100%
15.6862745 %
Since the price went down, this is a decrease
15.69% decrease