Answer:
The first step is to replace the value of x from the first equation with x in the second equation:
x=y-7
3x+15y=-1
3(y-7)+15y=-1
3y-21+15y=-1
18y=-1+21
18y=20
y= =
x=
x=
Heads, or tails. It's 1/2 a chance, because either way you will either land heads or tails. It would be a probability of 1-(1/2)^5. Can you solve that?
Answer:
D-45,45,90
Step-by-step explanation:
Think about it both of the sides of the triangle are the same, so that would mean two of the degrees would be the same
The equation (tanx-1) (secx-1) = 0 with<span> the interval 0≤ x ≤ 2π.
Set each factor to zero, that is
tan x - 1 = 0
secx - 1 = 0
x for tan are </span>
/2, 3
/2, 5
/2
x for sec are 0 and 2