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44)
{(-2,1),(1,3),(3.2),(4,-2)}

45)
f(x)=7x+2
f(-1)=7(-1)+2=-7+2=-5
f(3)=7(3)+2=21+2=23
f(5)=7(5)+2=35+2=37
{5,23,37}

Select the table that represents the following graph
x      y
-1   -4
0     -1
1      2
2      5

Given f(x)=10x+4 and g(x)=3x-8
f(x)+f(x)=(10x+4)+(3x-8)=13x-4
13x-4

Question 49
f(x)=x²-3x and g(x)=4x⁵
f(x)*g(x)=(x²-3x)(4x⁵)=4x⁷-12x⁶
4x⁷-12x⁶

Question 50
(0,3)
f(x)=-2x/3 + 2
f⁻¹(x)=-3x/2+3
f⁻¹(0)=3

If the gradient of a hill is 8%...
2/25
2*(100%)/25=8%

Question 53
given two points (x₁,y₁) and (x₂,y₂)
m=slope
m=(y₂-y₁)/(x-x₁)
(2,5) and (1-4)
m=(-4-5) / (1-2)=-9/-1=9
9

Question 54
a decrease of 25 ant per minute
The following belows values...
K=y₁/x₁=-6/2=-3
-3

question 56
84 miles/4 gallons=189 miles/x
x=(189 miles * 4 gallons) / 84 miles=9 gallons
9 gallons

Question 57
4x+3y=1

Question 58
if x=0 ⇒ 4*0+5y=80  ⇒y=80/5=16
16

Many things that seem threatening in the dark become welcoming when we shine light on them