4.2x - 1.4y = 2.1 |multiply both sides by 10
42x - 14y = 21 |subtract 42x from both sides
-14y = 21 - 42x |change signs
14y = 42x - 21 |divide both sides by 14
y = 3x - 1.5
Answer:

Step-by-step explanation:
Using the rule of exponents
=
, then
=
= 
Answer:
1035272
Step-by-step explanation:
The answer is by using the measuring tape
Because they show exactly how much of something is there/needed.