Answer:
45
Step-by-step explanation:
by the definition of an isocoles triangle, defined by having two congruent sides, (p-s, r-s), angles SPR and SRP are congruent. by the triangle sum theorem, (internal angles + to 180˚) 90˚ + 2a = 180˚. 2a =90, a = 45
Step-by-step explanation:
Consider the provided multiplication.
We need to use associative property of multiplication.
Associative property of multiplication:

Now use the above property and solve the provided multiplication:



The multiplication is verified by associative property.
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Answer:
-30r + 15
Step-by-step explanation: