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2 years ago

A battery manufacturer randomly tests 500 batteries and finds that 3 are defective.

Mathematics

2 answers:

Furkat [3]2 years ago

3 0

The answer would be C.60

jeka942 years ago

3 0

You divide12,000÷500=24multiply by3=72 that's your answer

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Please help me im very confused on how do do this stuff.

lianna [129]

Answer:

'A=(3,-1) 'B=(2,-4) 'C=(0,-1)

Step-by-step explanation:

I don't really know how to explain it

8 0

2 years ago

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Given f(x) = x^2- 3x + 5, what is f(-2)?

vlabodo [156]

Step-by-step explanation:

f(x) = x² - 3x + 5

f(-2) = (-2)² - 3.(-2) + 5

f(-2) = 4 + 6 + 5

f(-2) = 15

7 0

6 months ago

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Which are the solutions of x2 = 19x + 1?

Finger [1]

Answer:

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

Step-by-step explanation:

we have

$x^2=19x+1$

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2}-19x-1=0$

$a=1\\b=-19\\c=-1$

substitute in the formula

$x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}$

$x=\frac{19\pm\sqrt{365}} {2}$

$x=\frac{19+\sqrt{365}} {2}$

$x=\frac{19-\sqrt{365}} {2}$

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

therefore

StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction

6 0

3 years ago

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After Halloween, a variety store had some costumes regularly priced at $20.50 on sale for 20% off the regular price. A few weeks

Diano4ka-milaya [45]

20.50 * 0.8 = $16.40

16.40 * 0.4 = $6.56

Final selling price = $6.56

6 0

3 years ago

Simplest form 2/5ths

ratelena [41]

Answer:

2/5 is the simplest form. But in decimal form it is 0.4

Step-by-step explanation:

2/5

=2 divided by 5

=0.4

7 0

2 years ago

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