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ss7ja [257]
3 years ago
8

How do you know a quadratic function has exactly one zero?

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
5 0

Answer:

b)

Step-by-step explanation:

y = x² + 6x + 9 = (x + 3)(x + 3)

(x + 3)(x + 3) = 0, x = - 3,

or

you can find  D =b² - 4ac

y = x² + 6x + 9

a = 1, b = 6, c = 9

D = 6² - 4*1*9 = 36- 36= 0

When D =0, a quadratic function has exactly one zero.

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Ramond is putting a fence around his rectangular garden shown above. Before he can build the fence, he needs to find the perimet
solniwko [45]

The gardens perimeter is 12 meters.

Explanation:

  • The garden has a 4m length and a 2m width. The perimeter of any given rectangle is two times the sum of the length and the width of the same rectangle.
  • Perimeter = 2 × (length of the rectange + width of the rectangle)

        Perimeter = 2 × (4m + 2m) = 2 × (6m) = 12 meters.

  • So the gardens perimeter is equal to 12 meters.
  • Ramond needs to buy a fence for a garden whose parameter is 12 meters.

3 0
3 years ago
Find the value of x. pls will give brainliest for correct answer <br><br>​
snow_lady [41]

Answer:

x=66°

Step-by-step explanation:

We know that the total angle measure in a triangle is always 180°, so first we need to find the angle value of BAC. They give us a straight line aligning with this angle and measure of 98° for the angle DAB (which is forming other part of line) and a line is 180° so we subtract and find that angle BAC is 82°.

Now that we know the angle measure of 2 angles in the triangle, we add them up and get 114°. Now we subtract this from 180° and get 66°, which is the measure of x.

5 0
3 years ago
Please help ASAP! I’ll give brainlist.
jek_recluse [69]

8.5 is the nearest one

square root of 72 is about 8.48

rounding to the nearest tenth gives you 8.5

5 0
3 years ago
If I needed to write in this format (A U B) how would i write it
MAXImum [283]

Answer:

n(AUB)=n(A)+n(B)–n(AnB)

n(AUB)=n⁰(A)+n⁰(B)+n(AnB)

Step-by-step explanation:

This is the formula i have learned. Hope this will help u. U can use them according the question type.

7 0
3 years ago
Where would you insert parentheses to make the statement true?
9966 [12]
Just around the 15 and 3. So it would be

(15-3)x4+9=57

This is because (15-3)= 12
12x4=48
48+9= 57
8 0
3 years ago
Read 2 more answers
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