Answer and Step-by-step explanation:
To find the length of BC, we will be using the <u>trigonometric function </u><em><u>Sine</u></em>.
The Sine trig function is as follows:
sin(θ) =
Plug in the values and solve for the Hypotenuse (BC)
Multiply x to both sides, then divide both sides by sin(45).
x =
Input into a calculator and solve.
The length of BC is , or 11.3137.
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Answer:
Step-by-step explanation:
Question One
Multiply through by 2
2*1/2 * (2x + y ) = 21/2 * 2
Combine
2x + y = 21
Subtract 2x from both sides
y = 21 - 2x
Now equate the two given equations
y = 21 - 2x
y = 2x
Add 2x to both sides
2x = 21 - 2x
2x + 2x = 21
4x = 21
x = 21/4
x = 5 1/4
or
x = 5.25
Question 2
multiply numerator and denominator of the second fraction by (x + 2)
Remove the numerator brackets in the right hand fraction. Look out for the minus sign.
Answer:
20 or D.
Step-by-step explanation:
You simply plug in the values given for a and b:
So, your answer is 20.