I believe x=3.
4x-3(-2)=18
4x=12
x=3
The factored form would be (3x-9)(x-1)
The picture should help a bit
Answer:
3(x + 2) = 3x + 6
Step-by-step explanation:
3(x + 2) = 3x + 6
Distribute --> 3x + 6 = 3x + 6
<span>exact value of sin 157.5 without using a calculator
sin(157.5)=sin(315/2)
Identity: sin(x/2)=±√[(1-cosx)/2]
select positive identity since 175 is in the 2nd quadrant where sin>0
sin(315/2)=√[(1-cos315)/2]
cos 315=cos45 in quadrant IV=√2/2
sin(315/2)=√[(1-√2/2)/2]=√[(2-√2)/4]=√(2-√2)/2
sin(157.5)=√(2-√2)/2
check using calculator:
sin157.5º≈0.382...
√(2-√2)/2≈0.382...</span>
