Answer:
Y = 27
Step-by-step explanation:
In the equation (y = 12 + 5x) the X is the independent value. When you replace this by 3 you will multiply 3*5 which will give you 15 and then you will want to add 12 as that is your y intercept. Giving the value of your Y a 27, or the point would be (3,27)
Answer:
A perfect score on a test
Step-by-step explanation:
Since the score gets subtracted for each wrong answer, if x=0 then then nothing would get taken away from the initial 80
Answer:

Step-by-step explanation:
We are given that

f(0)=-3,f(1)=2,f(3)=5 and f(4)=0
We have to find the polynomial
Substitute the value x=0 then ,we get
f(0)=d=-3
Substitute x=1 then we get


(equation I)
Substitute x=3 then we get


(Equation II)
Substitute x=4 then we get

(Equation III)
Equation I multiply by 3 then subtract from equation II
(Equation IV)
Equation II multiply by 4 and equation III multiply by 3 and subtract equation II from III
(Equation V)
Equation IV multiply by 2 and then subtract from equation V



Substitute the value of a in equation IV then we get




Substitute the value of b in equation I then we get



Substitute the values then we get

Answer:
929
Step-by-step explanation:
For every 11 children, 7 will have homes and 4 will not.
The fraction of children without homes is 4/11.
The number of children without homes is
4/11 × 2556 = 929
Check:
The number of children with homes is 2556 - 929 = 1627
With/Without = 1627/929 = 7.005/4 ≈ 7/4
OK.