3 years ago

Which statements are true?

1 answer:

Montano1993 [528]3 years ago

6 0

Three of those statements are true.
The only one that is NOT correct is:
<span>Any quadrilateral with one right angle is a rectangle.

</span>

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Which equation has the components of 0 = x2 – 9x – 20 inserted into the quadratic formula correctly? x = StartFraction negative

AnnZ [28]

Answer:

$x=\frac{9+/-\sqrt{(-9)^2-4\,(1)\,(-20)} }{2\,(1)}$

Step-by-step explanation:

Recall that the quadratic formula gives you the pattern to follow in order to find the solutions to a quadratic equation of the form: $ax^2+bx+c=0$

It tells us that we need to use the parameters $a,\, b,$ and $c$ in the following formula in order to get the answers for the x-values that solve it:

$x=\frac{-b+/-\sqrt{b^2-4\,a\,c} }{2\,a}$

so, in our case, $a=1$ , $b=-9$ , and $c=-20$

then, replacing these values in the formula, we obtain:

$x=\frac{-b+/-\sqrt{b^2-4\,a\,c} }{2\,a}\\x=\frac{-(-9)+/-\sqrt{(-9)^2-4\,(1)\,(-20)} }{2\,(1)}\\x=\frac{9+/-\sqrt{(-9)^2-4\,(1)\,(-20)} }{2\,(1)}$

Which looks like the third expression you are listing (although it is a little hard to read)

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3 years ago

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You have five gears meshed to each other running in a line. the first gear z=100, second gear z=50, third gear z=200, fourth gea

Julli [10]

Answer:

50 rpm clockwise

Step-by-step explanation:

100/50 × 50/200 × 200/150 × 150/200 = 0.5

In an odd number of gears, the first and last rotate inthe same direction.

100 rpm × 0.5 = 50 rpm

Answer: 50 rpm clockwise

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Arturiano [62]

Answer: (B) SinA = 4/5

Step-by-step explanation: Sine= O/H or opposite of hypotenuse so in regards to the triangle opposite is 28 and hypotenuse 35 or 28/35 which also equals 4/5

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I am sorry I needed points

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Out of 400 students, 35% say apples are their favorite fruit. How many students say apples are NOT their favorite fruit?

pochemuha

Answer: its 140

Step-by-step explanation:

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3 years ago

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