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NARA [144]
3 years ago
12

Kathy was at a cabin for four nights. The outside temperatures for the four nights were: Night One:   −10 °F      Night Two:    

−2 °F       Night Three:   +1°F Night Four:    −4 °F Which temperature was the coldest?
Mathematics
2 answers:
Dmitry_Shevchenko [17]3 years ago
8 0

the highest negative number would be the coldest as it is the furthest away from 0

 so Night One at -10 would be the coldest

nataly862011 [7]3 years ago
6 0

Answer:

-10

Step-by-step explanation:

I take test and get 100

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Solve each radical equation. Be sure to check your solutionsa)√(x+5)-9=-12b)√(4x-7)=√(3x+9)
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Answer:

a) There is no solution to the equation.

b) Solution: x = 16

Step-by-step explanation:

Hi there!

a) Let´s write the equation:

√(x + 5) - 9 = -12

add 9 to both sides of the equation

√(x + 5) = -12 + 9

√(x + 5) = -3

Square both sides of the equation

x + 5 = 9

Subtract 5 to both sides

x = 9 - 5

x = 4

Let´s check the solution:

√(x + 5) - 9 = -12

√(4 + 5) - 9 = -12

√9 - 9 = -12

3 - 9 = -12

-6 ≠ -12

Then x = 4 is not a solution to the equation.

b) Let´s write the equation:

√(4x - 7) = √(3x + 9)

square both sides of the equation  

4x - 7 = 3x + 9

subtract 3x and add 7 to both sides of the equation

4x - 3x = 9 + 7

x = 16

Let´s check the solution:

√(4x - 7) = √(3x + 9)

x = 16

√(4(16) - 7) = √(3(16) + 9)

√57 = √57

Then x = 16 is the solution to the equation

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