starsinopoli13
29.10.2019 •
Mathematics
2. a scuba diver was exploring a reef 77.5 m below sea level. the diver ascended to the surface at a rate of 12.5 m/min.
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Ответ:
for number one its -x+10y=14x+10y=21 the next one is Simplifying
-7x + -5y = 11
Solving
-7x + -5y = 11
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '5y' to each side of the equation.
-7x + -5y + 5y = 11 + 5y
Combine like terms: -5y + 5y = 0
-7x + 0 = 11 + 5y
-7x = 11 + 5y
Divide each side by '-7'.
x = -1.571428571 + -0.7142857143y
Simplifying
x = -1.571428571 + -0.7142857143y
Step-by-step explanation:
these r for the first one