Answer:
A.
Step-by-step explanation:
Multiplying by moves the decimal point n places to the right.
Doing so 8 times for 5.21 gives 521,000,000.
Ellen's house is farther from Haley's because 1.41 miles = 7444.8 feet. It is also 898 feet farther away because 7444.8-6547 = 897.8, then you round to the nearest foot, giving you 898 feet.
Answer:
B.-4x^2-2x+6.
Step-by-step explanation:
=2x^2+4x-6x^2+9-6x-3.
=2x^2-6x^2+4x-6x+9-3.
=-4x^2-2x+6.
1. x is the number of feet, y is the number of inches
2. substitute means to replace a variable with a number
3. y = 12 (5) = 60 inches.