Hello :
<span>Y=x²-2x-19 ...(1)
y+4x=5.....(2)
by (2) : y = 5-4x ....(*)
subsct in (1) : 5-4x</span>=x²-2x-19
x²+2x-24 =0
<span>Δ = 2²-4(1)(-24) = 100=10²
x1 = (-2-10)/2 =-6
x2= (-2+10)/2=4
if : x =-6 by(*) : y= 5-4(-6)=29
if x= 4 y = 5-4(4)=-11
</span><span>solution set system of equation is (-6,29) and (4,-11)______.</span>
Answer:
Any values for n that are greater than 4 will satisfy the expression
Step-by-step explanation:
We have the expression
7n/4 > 7 solve for n...
7n > 28 multiply by 4 on both sides
n > 4 divide by 7 on both sides,
n is greater than 4, so any value for n greater than 4 will satisfy the inequality
<span>We write pattern linear function
f(x) = ax + b
</span><span>Both points must be in one straight line so they can be used to lay the system of equations .
Points A=(4,4), B = (-1,5)
x y x y
</span>

<span>We insert the calculated a and b in the equation f(x) = ax + b
</span>

<span>Since a> 0, the function is decreasing</span>
Question 6 : 12i
Question 7 : 1
Question 5 : 10
Question 3 : 2x+4
Question 4 : 9x+36