The answer is B
Step-by-step explanation:
As shown in the given figure, ΔDEF is a right-angles triangle, where ∠DFE = 90°, DF = 15 units and EF = 20 units.
We are to find the length of DE.
ΔDEF is right-angled at ∠DFE.
So, using Pythagoras theorem, we have
\begin{lgathered}DE^2=DF^2+EF^2\\\\\Rightarrow DE^2=15^2+20^2\\\\\Rightarrow DE^2=225+400\\\\\Rightarrow DE^2=625\\\\\Rightarrow DE^2=25^2\\\\\Rightarrow DE=25.\end{lgathered}
DE
2
=DF
2
+EF
2
⇒DE
2
=15
2
+20
2
⇒DE
2
=225+400
⇒DE
2
=625
⇒DE
2
=25
2
⇒DE=25.
Answer:
bottom right
Step-by-step explanation:
linear means "forms a line"
x=-28......................
7/3 and 9/2
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Answer:
30 dogs
Step-by-step explanation:
There are 40 cats, and 25% more cats than dogs. If you find 25% of 40, you get 10. That means there are 10 more cats than dogs. 40-10= 30.
30 dogs.
