Answer:

Step-by-step explanation:
Given

Putting x = -3 to find f(-3)

as
∵ 
so





∵ 
Thus,

Answer:
a = =36
Step-by-step explanation:
a + 6 = -30
make a on its own
a = -30 - 6
a = =36
Answer:
0.9 x 81
Step-by-step explanation:
0.9 is actually 0.90 and 90 is greater than 75
Answer:
450,000
Step-by-step explanation:
128/64:2
225,000 X 2: 450,000
Answer:
8.5
Step-by-step explanation:
Given the expression 12.75/1.5. The technique in solving the division expression is as shown
First we can write the decimals as fraction as shown;
12.75 = 1275/100
1.5 = 15/10
12.75/1.5 = (1275/100)÷(15/10)
12.75/1.5 = 1275/100×10/15
12.75/1.5 = 1275/10 × 1/15
12.75/1.5 = 1275/150
12.75/1.5 = 8.5
Hence the result of the division is 8.5