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3 years ago

14

What is the equation of the quadratic graph with a focus of (1,1) and a directrix of y=-1

1 answer:

Kruka [31]3 years ago

7 0

Ok the vertex is the midpoint of the line between the focus and directrix so it is (1, 0) and the constant before is equal to 1/4 I believe so the equation should be y= 1/4 * (x-1)^2

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A fan is marked up 40% on the original price the original price was 20$ what is the new price of the fan before sales tax

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Answer:

28 dollars is the new price.

Step-by-step explanation:

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3 years ago

If the side of every square is 2 centimeters, how many centimeters is the circumfence of the figure?

Mandarinka [93]

Answer:

<h2> 76 cm</h2>

Step-by-step explanation:

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3 years ago

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S_A_V [24]

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3 years ago

A basic cellular phone plan costs $4 per month for 70 calling minutes. Additional time costs $0.10 per minute. The formula C= 4+

Harrizon [31]

Answer:

For a monthly cost of at least $7 and at most $8, you can have between 100 and 110 calling minutes.

Step-by-step explanation:

The problem states that the monthly cost of a celular plan is modeled by the following function:

$C(x) = 4 + 0.10(x-70)$

In which C(x) is the monthly cost and x is the number of calling minutes.

How many calling minutes are needed for a monthly cost of at least $7?

This can be solved by the following inequality:

$C(x) \geq 7$

$4 + 0.10(x - 70) \geq 7$

$4 + 0.10x - 7 \geq 7$

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$x \geq \frac{10}{0.1}$

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For a monthly cost of at least $7, you need to have at least 100 calling minutes.

How many calling minutes are needed for a monthly cost of at most 8:

$C(x) \leq 8$

$4 + 0.10(x - 70) \leq 8$

$4 + 0.10x - 7 \leq 8$

$0.10x \leq 11$

$x \leq \frac{11}{0.1}$

$x \leq 110$

For a monthly cost of at most $8, you need to have at most 110 calling minutes.

For a monthly cost of at least $7 and at most $8, you can have between 100 and 110 calling minutes.

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Sliva [168]

The answer would be 0.37.

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