3 years ago

Find the zeros of y = x2 - 6x - 4 by completing the square.

Mathematics

2 answers:

Anuta_ua [19.1K]3 years ago

7 0

Answer:

i got x = -1

Step-by-step explanation:

all i did is find the x intercep nor zero

motikmotik3 years ago

3 0

Uh I don’t think the question or answer choices are typed in correctly, I’ll help once it is

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3 years ago

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Step-by-step explanation:

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3 years ago

Find the x-intercept(s) of y = 2x2 - 3x - 5.<br> A) -5 <br> B) 2 1/2, -1<br> C) 3, -5 <br> D) 5, -1

Alexus [3.1K]

Answer:

$\large\boxed{B)\ 2\frac{1}{2},\ -1}$

Step-by-step explanation:

x-intercepts are for y = 0.

We have the equation:

$y=2x^2-3x-5$

Therefore

$2x^2-3x-5=0\\\\2x^2+2x-5x-5=0\\\\2x(x+1)-5(x+1)=0\\\\(x+1)(2x-5)+0\iff x+1=0\ \vee\ 2x-5=0\\\\x+1=0\qquad\text{subtract 1 from both sides}\\\boxed{x=-1}\\\\2x-5=0\qquad\text{add 5 to both sides}\\2x=5\qquad\text{divide both sides by 2}\\\boxed{x=2\frac{1}{2}}$

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3 years ago

I really need help on this one, guys

Gennadij [26K]

Answer:

6.2 meters

Step-by-step explanation:

Use pythagorean theorem to find b:

b = √(2.8² - 2.7²) = √0.55 = 0.7 (nearest tenth)

Perimeter of triangle = sum of all its sides = 2.8 + 2.7 + 0.7

Perimeter = 6.2 meters

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3 years ago

Amie has 9 cats. each cat eats 1/3 can of food each day. how many cans of food are used each day?

Basile [38]

Answer:

3 Cans.

Step-by-step explanation:

Each cat can take one portion. so

9 ÷ 3 = 3

3 cans a day

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3 years ago