It is 172 degrees, because you multiply 86 by 2
3x² + 3y² = 75
divide everything by 3
x² + y² = 25
This is a standard equation of a circle.
Center (0,0) and radius = 5
Answer:
left 1 unit, up 5 units
Step-by-step explanation:
First factor
g(x)=x^2+2x+6 = (x+1)^2+5
The standard transformation formula is
g(x) = a*f(bx-h) + k
which means
a=1, b=1,h=-1, k=5
or
h=-1 means translate left one unit
k=5 means translate up 5 units.
Choose the first option: left 1 unit, up 5 units
Answer:
<u>870</u> people attend the school.
Step-by-step explanation:
Given:
Thad conducted a survey on hair color at his school.
His results were:
23 students had blonde hair, 38 students had black hair, 7 students had red hair and 19 students had brown hair.
Now, to find number of people attended school if he had sampled 1 out of every 10 students.
So, we add the total number of students who had been surveyed on hair color:
Then, we get the percentage of the sample of 1 out of 10 students:
<u><em>Thus, we get that 10% of students surveyed from the total who attend the school.</em></u>
Now, to get the number of people who attend school we set an equation:
Let the people attend the school be .
So,
⇒
⇒
<em>Multiplying both sides by 100 we get:</em>
⇒
<em>Dividing both sides by 10 we get:</em>
⇒
Therefore, 870 people attend the school.