Answer:

Step-by-step explanation:
We are given equation of parabola as

we can also write as

now, we can compare

and find a , h , and k
a=1
h=0
k=0
now, we can use focus formula

now, we can plug values


Answer: A is your aswer hope thsi helped
Step-by-step explanation:
pleas make brainly
Answer:
c. 80
Step-by-step explanation:
cos x = sin(x-70)
cos x = cos [90-(x-70)]
cos x = cos (90-x +70)
cos x = cos 160 -x
x= 160-x
2x = 160
x =80