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IrinaVladis [17]
3 years ago
8

Find the zeros of the quadratic function: y=x^2-4x-12

Mathematics
1 answer:
TEA [102]3 years ago
8 0

Answer:

x {}^{2}  - 4x - 12 = 0 \\ (x - 6)(x + 2) = 0 \\ x = 6 \:  \: x =  - 2

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A bag contains 25 balls 20 of which are blue what percentage of balls are not blue
Artist 52 [7]

Answer:

20%

Step-by-step explanation:

20/25 = blue

This means 5/25 of the balls in the bag are NOT blue

(25-20 = 5)

We need to convert 5/25 to a percentage

\dfrac{5}{25} = \dfrac{5\times4}{25\times4}=\dfrac{20}{100}

% = per cent

"per" means "out of"

"cent" means "one hundred"

so

20/100 = 20%

7 0
2 years ago
A gardener expects that 75% of the seeds she plants will produce plants she wants 45 plants how many seeds should she plant ?
Ira Lisetskai [31]
Let it be x
0.75x=45
x= 60
5 0
3 years ago
Read 2 more answers
What property justifies the second step for this equation?
Ipatiy [6.2K]
It would be the distributive property. :)

4 0
3 years ago
What is he inverse of the function f(x) =1/4x-12
Aleks [24]
The answer is D....

5 0
3 years ago
Evaluate the expression 1 2 over 5 x plus 3 2 over 3 for x equals 1 fourth.
ch4aika [34]

<em>The </em><em>evaluated expression </em><em>needed is </em>\frac{18}{5} <em>or  </em>3\frac{3}{5}

The expression that needs to be evaluated is

1 \frac{2}{5x} + 3\frac{2}{3} for x = \frac{1}{4}

We are being asked here to solve the mathematical equation by substituting the value of x for 1/4. If we go ahead and do the substitution we have;

1\frac{2}{5(0.25)} + 3\frac{2}{3}

where x = \frac{1}{4} = 0.25

this is equal to

1\frac{2}{1.25} + 3\frac{2}{3} =

1 * 8/5 + 3 * 2/3

8/5 + 2 = 18/5 = 3\frac{3}{5}

Learn more on mixed fractions here brainly.com/question/17388313

5 0
2 years ago
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