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laila [671]
3 years ago
5

Please help!!!!!!!!!!!!!!!!!!!! Due tomorrow

Mathematics
1 answer:
denpristay [2]3 years ago
6 0

9a. From 6 yards deep to 15 yards deep, the temperature is constant. So, the temperature at 10 yards deep is the same as it is 6 yards below the surface. The temperature has dropped 2° from the surface temperature for each of those 6 yards, so is (2°/yd)×(6 yd) = 12° less than the surface temperature.

At 10 yards deep, the temperature is 70° -12° = 58 °F

9b. From part A, we know that the temperature at 15 yards (45 feet) below the surface is 58 °F. For each of the 5 feet from 45 feet deep to 50 feet deep, the temperature is increasing 3°. At 50 ft deep, it will be (3°/ft)×(5 ft) = 15° higher than at 45 ft deep.

At 50 feet deep, the temperature is 58° +15° = 73 °F

9c. Based on the result from part B, we can write the expression for the temperature 20 yards (60 ft) deep as

... 73 °F + (3 °F/ft)×(10 ft) . . . . temperature 60 ft below the surface

_____

Evaluating this expression, we get the source temperature to be ...

... = 103 °F

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The solution of the equation is  x=\frac{11}{7}

Step-by-step explanation:

To simplify an equation of x

  • Simplify each side of the equation
  • Collect x in side and the numerical terms in the other side
  • Find the value of x

∵ The equation is 2x + \frac{1-x}{4}=3

- Multiply all terms of the equation by 4 to cancel the denominator

 of the 2nd term in the left hand side

∵ The equation is 4(2x) +4 (\frac{1-x}{4})=4(3)

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- Subtract 1 from both sides

∴ 7x = 11

- Divide both sides by 7

∴ x=\frac{11}{7}

The solution of the equation is  x=\frac{11}{7}

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