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Sagot :
Answer:
Sheldon has to sell at least 143 cups of coffee to purchase the kayak.
Step-by-step explanation:
First write an expression:
15 + 0.25x ≥ 50.75
Next use inverse operations:
15 + 0.25x - 15 ≥ 50.75 - 15
0.25x ≥ 35.75
0.25x ÷ 0.25 ≥ 35.75 ÷ 0.25
x ≥ 143
Sheldon has to sell at least 143 cups of coffee to purchase the kayak.
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Answer:
143 cups
Step-by-step explanation:
Sheldon gets a flat $15, as well as 25 cents for each cup of coffee made.
He needs $50.75 to buy a Kayak.
Set the equation. Let the amount of cups of coffee = c.
0.25c + 15 = 50.75
Isolate the variable, c. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.
PEMDAS is the order of operation, and equals:
Parenthesis
Exponents (& Roots)
Multiplication
Division
Addition
Subtraction
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First, subtract 15 from both sides of the equation:
0.25c + 15 = 50.75
0.25c + 15 (-15) = 50.75 (-15)
0.25c = 50.75 - 15
0.25c = 35.75
Next, divide 0.25 from both sides of the equation:
(0.25c)/0.25 = (35.75)/0.25
c = 35.75/0.25
c = 143
Sheldon will need to sell 143 cups of coffee.
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