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Juliette [100K]
3 years ago
9

Donna gets 3 problems incorrect on a math quiz. Her score is 85%. How many questions are on the quiz.

Mathematics
1 answer:
nata0808 [166]3 years ago
5 0

Answer:

20

Step-by-step explanation: 5 times 20 = 100

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Julio and David were in Target and decided to check out the clearance section. They found pencils and erasers that were on sale
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Answer:

Cost of one pencil: \$0.07

Cost of one eraser: \$0.03

Step-by-step explanation:

Let be "p" the cost in dollars of one pencil and "e" the cost in dollars of one eraser.

Based on the information given in the exercise, you can set up the following system of equations:

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Multiply the first equation by -3 ad the second one by 4. Then add the equations and solve for "e":

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Substitute the value of "e" into any original equation  and solve for "p":

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Using the x intercept method what are all the real solutions of the equation x^3-8x^2+9x+18=0
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