Answer:
Step-by-step explanation:
The product of..2x + y and 5x - y +3....
= (2x + y) × (5x - y + 3)
= (10x² -2xy + 6x + 5xy -y² + 3y)
= ( 10x²- y² +3xy +6x + 3y)
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Rounded to the nearest whole number, 75.82 is 76
Answer:
sinC =
Step-by-step explanation:
We require to find the side DE before finding sinC
Using Pythagoras' identity in the right triangle
DE² + CE² = CD²
DE² + 5² = ( )²
DE² + 25 = 41 ( subtract 25 from both sides )
DE² = 16 ( take the square root of both sides )
DE = = 4 , then
sinC = = = , rationalise the denominator
sinC = × =
Answer:
x = -6
Step-by-step explanation: