5x + 60y = 35
x +y = 1.5 : rewrite as x = 1.5-y and substitute this formula for x in the first one:
5(1.5-y) + 60y = 35
distribute:
7.5 - 5y + 60y = 35
combine like terms:
7.5 + 55y = 35
subtract 7.5 from both sides:
55y = 27.5
divide both sides by 55 to solve for y
y = 27.5 / 55 = 0.5
now substiute 0.5 for y in the 2nd equation:
x + 0.5 = 1.5
x = 1.5 - 0.5 = 1
he walked for 1 hour
Answer:
Step-by-step explanation:
The degree of a polynomial is the highest exponent. Our highest exponent is a 2, so we have a second degree polynomial.
Answer:
x=2
Step-by-step explanation:
So 9x+3=-7+7x+14
Subtract 3: 9x=4+7x
Subtract 7x: 2x=4
x=2
The solution is
y=5.6
hope this helps:)
Answer:three significant figures: the 4, the 1, and the 8. This is ... 3) 7.09 x 10¯5 - three significant figures. ... Here is how it would be written: 9.160 x 104. ... Find the number with the LEAST number of digits in the decimal portion. ... The first value in the problem, with three significant places to the right of the decimal point, ...
Missing: (5.4 | Must include: (5.4
Step-by-step explanation:
