MATHEMATICS HIGH SCHOOL

Plzzzzz help will give brain and points!!! Explain why a quadratic equation with a positive discriminant has two real solutions, And why a quadratic equation with a negative discriminant has no real solution, And a quadratic equation with a discriminant of zero has one real solution.

Answers

Answer 1
Answer:

Answer:

The given equation is -2x^2 = -8x + 8

This can be rewritten as 2x^2 - 8x + 8 = 0

Here the value of a =2, b = -8 and c = 8

Discriminant = b^2 - 4ac

Now plug in the above values in the discriminant, we get

= (-8)^2 - 4*2*8

= 64 - 64

= 0

Here the discriminant is 0, so we will get one real root.

The discriminant is equal to 0, which means the equation has one real number solution.

Hope this will helpful.

Thank you.

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salma purchased a prepaid phone card for $20. long distance calls cost 24 cents a minute using this card. salma used her card only once to make a long distance call. if the remaining credit on her card is $13.52. how many minutes did her call last?

Answers

We can set up an equation to solve this problem, but first we need to write out what we know.

$20 overall
$0.24 every minute
$13.52 remaining on the card

Now that we know our information, we can set it up in an equation. 

20 - 0.24x = 13.52

The 20 represents $20 overall when she first got the phone card.
We are then subtracting $20 from how must it costs a minute (which is 24 cents). The 'x' indicates the number we are trying to find (how many minutes her call lasted). Lastly, 13.52 is the result of everything, since she has $13.52 remaining on the card.

We can now solve the equation:

20 - 0.24x = 13.52
-0.24x = 13.52 - 20 /// subtract 20 from each side
-0.24x = -6.48 /// simplify
x = 27 /// divide each side by -0.24

Our solution is: x = 27.

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An easier way to solve this problem would be to first, subtract the total amount of money she had on the card when she first got it, and then the remaining total she ended up with.

$20 - $13.52 = $6.48

So, she spent a total of $6.48 on long distance calls, but since we are looking for how many minutes, we need to divide the total she spent and how much it costs per minute.

6.48 ÷ 24 = 27

We receive the same amount of minutes spent just like we did the last way we solved.

-----

Salma spent 27 minutes on the phone. 

Please help with question 2! BRAINLIEST to correct answer!!!

Answers

Answer:

B: (-infinity, 4]

If the diameter of a circle has endpoints A (7,2) and B (-1,8), where is the center?

Answers

first we will get sum of X coordinates of A and B
secondly we will divide it by two
same sum the Y coordinates and divide it by
(-1+7)/2=3 and  (2+8)/2=5
so the center will be (3,5)
hope it helps
In the middle: x-coordinate= {7-(-1)}/2= 4 y-coordinate= (8-2)/2= 3 So centre is (4,3)

I have a math worksheet and it asks "what is wrong with camping on the Sahara desert

Answers

Final answer:

Camping in the Sahara desert can be dangerous due to the extreme temperatures, lack of water resources and hazards related to wildlife and weather conditions.

Explanation:

The Sahara Desert is the world's largest hot desert, and can be an incredibly difficult environment to camp in due to extreme temperature fluctuations, lack of water resources, and potential for dangerous weather conditions such as sandstorms. During the day, temperatures in the Sahara can soar above 50°C, and at night they can plummet to near freezing. These temperature extremes can pose a significant threat to human health if one is not adequately equipped or prepared. The desert is also home to a variety of wildlife that can pose hazards, including venomous snakes and scorpions.

Learn more about Sahara Desert here:

brainly.com/question/3906112

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Final answer:

Camping on the Sahara Desert is not advisable due to extreme weather conditions, limited resources, and potential risks from wildlife.

Explanation:

Camping on the Sahara Desert may not be an ideal choice for several reasons:

  1. The Sahara Desert is an extremely hot and arid region, with temperatures soaring above 100°F during the day and dropping significantly at night. It can be challenging to find shade and shelter in such harsh conditions, making camping uncomfortable and potentially dangerous.
  2. The vast expanse of sand dunes and limited vegetation in the Sahara Desert make it difficult to find suitable spots for camping, such as flat ground or areas with natural resources like water for cooking and drinking.
  3. The Sahara Desert is home to various wildlife, including scorpions, spiders, and snakes, some of which can be venomous. Camping in such an environment increases the risk of encountering these creatures and the potential for bites or stings.

In summary, camping on the Sahara Desert is not advisable due to extreme weather conditions, limited resources, and potential risks from wildlife.

Learn more about Camping on the Sahara Desert here:

brainly.com/question/3906112

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Which best describes the range of the function f(x) = 2/3(6)x after it has been reflected over the x-axis?A. all real numbers
B. all real numbers less than 0
C. all real numbers greater than 0
D. all real numbers less than or equal to 0

Answers

The right answer for the question that is being asked and shown above is that: "D. all real numbers less than or equal to 0." This is the statement that best describes the range of the function f(x) = 2/3(6)x after it has been reflected over the x-axis
The correct answer is:

D) all real numbers less than or equal to 0.

Explanation:

When you reflect a function across the x-axis, you negate every y-coordinate in the function.

In our original function, our y-values will all be positive.  Reflecting this across the x-axis will make all of the y-values negative; this means the range, or set of y-values, will be less than or equal to 0.

The new club sticker is in the shape of a triangle. It has a height of 16 inches and a base of 14 inches. The area of the club sticker is ____ square inches.Triangle with height of 16 inches and base of 14 inches.

Answers

The area of a triangle is:

1/2 x base x height.

So with those values:
1/2 x 14 x 16 = 112

So the club would have an area of 112 inches squared.

Hello,

The correct answer is 112 Square Inches.

Hope this helps!!!! Happy Holidays!!!! (:
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