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guapka [62]
2 years ago
15

How many x-intercepts are in the quadratic equation y = 7x2 − 2x − 1​

Mathematics
1 answer:
babunello [35]2 years ago
7 0

Answer:

There are 2 x intercepts

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Which ordered pair is the solution to the system of linear equations y = -7x + 2 and y = 9x - 14?
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Y = -7x + 2
y = 9x - 14

-7x + 2 = 9x - 14
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16 = 16x
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Answer:

6.25n + 3.50

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Step-by-step explanation:

Break down the important information given in the problem.

The one-time delivery fee is 3.50. This is only paid one time an never again, making it the <u>constant</u>, a number that does not change.

Each lunch costs 6.25. This amount will increase depending on how many times Mr. Jackson orders lunches, "n" times. This number is the <u>rate</u> because it changes. The rate is attached to the variable.

If you add the amounts together, that is the total cost of ordering lunches.

6.25n + 3.50

(Reember expressions do not have the equal sign).

To find the cost of ordering 5 lunches, use the expression. Substitute "n" for 5 because "n" represents the number of lunches ordered.

6.25n + 3.50

= 6.25(5) + 3.50   Simplify by multiplying 5 and 6.25

= 31.25 + 3.50    Add the two values

= 34.75       Total cost of 5 lunches

Therefore the cost of ordering 5 lunches is $34.75.

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The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of 0.5 min
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