There are 5,280 feet in a mile.
Answer:
Option A, 
Step-by-step explanation:
<u>Step 1: Determine which expression is true</u>
Option A
We don't need to go any further. We were able to determine that option A was true by squaring both sides which got rid of the square root around x and gave y another power which produced y^2.
Answer: Option A,
Answer:
x=32 degrees
Step-by-step explanation:
a triangle sum up to 180 degrees.
to find x
42+ x+106 =180
Subtract the numbers to let x stand on its own
x= 180 - 106- 42
x=32
Let the first number be x and the second number be y. Then x-y = 18, assuming that x>y. y, the smaller number, is 1/7 th of x.
x-y=18 and y=x/7 govern this situation.
Let's find x. Subst. x/7 for y in x-y=18: x-x/7 = 18
Mult. all 3 terms by 7 to remove fractions: 7x - x = 126
Combine: 6x = 126; solve for x by div. both sides by 6: x = 21
The larger number is 21 and the smaller number is (21-18) = 3.
