Answer:
78
Step-by-step explanation:
Answer:
X=10x =10
means here value of X is 1
y = 4y = 4
means here value of y is also 1
now substitute the values of X and y in the equation
8×1-7×1×(8×1-7×1)
8-7(8-7)
64-49
15
Answer:
27i
Step-by-step explanation:
Since we define <em>i</em> as
, 
Remember you can do anything to do anything to an equation as long as you do it to both sides
n-8<10
add 8 to both sides
n-8+8<10+8
n+0<18
n<18