Question 1

1. At least 2 pizzas

   less than or equal to

   more than or equal to

   Region in the middle triangle

2. 4

3. 7

Question 2

1. log49 - loga = loga

   log (49/a) = log a

   log 49 = loga^2

   a^2 = 49

   a = 7

2. √5/25 = 5^b/c

   5^1/2 - 5^2

   5^(1/2 - 2)

   5^-1.5

   b = -3

   c = 2

Question 3

1. 45

2. 160ml

3. -45(n) + 475 = 0

   -45(n) = -475

   n = 475/45

   n = 10.56

   10 glasses

Question 4

1. 0.25 x P(B) = 0.15

   P(B) = 0.15/0.25

   P(B) = 0.6

2. 0.6 - 0.15 = 0.45

3. 0.25 + 0.6 - 0.15 = 0.7

   1 - 0.7 = 0.3

Question 5

1. f(x)=a(x-3)^2

   18=a(0-3)^2

   18=9a

   a=2

2. x^2 - 10x + 21 = 2(x - 3)^2

   x^2 - 10x + 21 = 2(x^2 - 6x + 9)

   x^2 - 10x + 21 = 2x^2 - 12x + 18

   0 = x^2 - 2x - 3

   (x+1)(x-3)=0

   x+1=0

   x=-1

   x-3=0

   x=3

3. x^2 - 10x + 21

   (x - 5)^2 - 25+21

   (x-5)^2 - 4

   h=5

   k=-4

4. vertical dilation by factor 1/2

   translation down by 2 units

   translation left by 4 units

   ????