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3 years ago

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Maria purchased a prepaid phone card for $15. Long distance calls cost 9 cents a minute using this card. Maria used her card onl

y to make a long distance call. If the remaining credit on her card is $11.76, how many minutes did her call last?

1 answer:

Solnce55 [7]3 years ago

8 0

Answer:

for 33 minutes

Step-by-step explanation:

I got it right

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Find the x-intercepts of the parabola with

12345 [234]

Answer:

x-intercepts are (0, 0) and (-6, 0)

Step-by-step explanation:

equation of a parabola in vertex form: y = a(x - h)² + k

where (h, k) is the vertex

Substituting the given vertex (-3, -18) into the equation:

y = a(x + 3)² - 18

If the y-intercept is (0, 0) then substitute x=0 and y=0 into the equation and solve for a:

0 = a(0 + 3)² - 18

⇒ 0 = a(3)² - 18

⇒ 0 = 9a - 18

⇒ 9a = 18

⇒ a = 2

Therefore, y = 2(x + 3)² - 18

To find the x-intercepts, set the equation to 0 and solve for x:

2(x + 3)² - 18 = 0

Add 18 to both sides: 2(x + 3)² = 18

Divide both sides by 2: (x + 3)² = 9

Square root both sides: x + 3 = ±3

Subtract 3 from both sides: x = ±3 - 3

so x = 3 - 3 = 0

and x = -3 - 3 = -6

So x-intercepts are (0, 0) and (-6, 0)

8 0

2 years ago

Read 2 more answers

Given that it was less then 80degrees on a given day, what is the probability that it also rained that day?

gladu [14]

The probability that it also rained that day would be 0.30

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3 years ago

Find the distance between the points (6,8) and (8,-2)<br>

Norma-Jean [14]

Answer:

$d$ ≈ $10.1980$

Step-by-step explanation:

Start with the distance formula:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Pair your values to your variables.

$x_1=6,x_2=8,y_1=8,y_2=-2$

Let's substitute those values into the formula.

$d=\sqrt{(8-6)^2+(-2-8)^2}$

Complete the operations in your parentheses.

$d=\sqrt{(2)^2+(-10)^2}$

Square the bases of your powers.

$d=\sqrt{4+100}$

Add.

$d=\sqrt{104}$

Find the square root of $104$ :

$d$ ≈ $10.1980$

I only provided 4 digits after the decimal point; feel free to round it accordingly.

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4 years ago

Please help it's the SLOPE

Morgarella [4.7K]

Answer:

3/2

Step-by-step explanation:

do rise over run

rise is 3

run is 2

3/2

hope this helps <3

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3 years ago

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I need it answered ASAP!! due in 2 hours!!!

Rzqust [24]

Answer:

1. Circle Q

2. Center Q

3. radius PQ, radius QR, radius QS

4. chord PS, chord PR

5. diameter PR

6. semi-circle PSR

7. acute angle SQR

8. SR = 44*QR

9. PS = (180-44)*QS = 136*QS

10.

11.

12. 180°-∠SQR

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3 years ago