Answer:
ok
Step-by-step explanation:
Answer
x - 15 = 18
Explanation
X is the variable that is required to get the answer 18
A function that is defined on a sequence of intervals.
Answer:
x=2.5
y=10
Step-by-step explanation:
I'm assuming you have the same question as me on mathswatch.
First, do 6 divided by 5. This gets you 1.2.
Then do 3 divided by 1.2 to find the length of x.
To find y, you have to do 3 divided by 5, this gets you 0.6
Divide 6 by 0.6 to get your answer of 10.
I hope this helps and is not too late :)
Hello,
cos θ =-1 or cos θ =-1/2
Indeed:
cos 2θ =2 cos² θ -1
cos 2θ +3 cos θ+2=0
==>2 cos² θ -1+3 cos θ+2=0
==>2 cos² θ +3 cos θ+1=0
Δ=3²-4*2=1
cos θ =(-3-1)/4=-1 or cos θ =(-3+1)/4=-1/2
We must verify:
if cos θ =-1 then 2*(-1)² -1 +3*(-1)+2=2-1-3+2=0
if cos θ =-1/2 then 2*(-1/2)² -1 +3*(-1/2)+2=2*1/4-1-3/2+2=1/2-3/2+1=0
