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2 years ago

17-||-9|+3| Can anyone help me out?

Mathematics

1 answer:

zmey [24]2 years ago

7 0

Answer:

Step-by-step explanation:

Step 1:

17 - 9 + 3

Step 2:

8 + 3

Answer:

Absolute Value turns everything positive.

Hope This Helps :)

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Is the system of equations consistent, consistent and coincident, or inconsistent? y=3x+4y=3x+3 Select the correct answer from t

Genrish500 [490]

Answer: Inconsistent

Step-by-step explanation:

y = 3x + 4 → m = 3, b = 4

y = 3x + 3 → m = 3, b = 3

These equations have the same slope but different y-intercepts so they are parallel lines which means they will never intersect.

NOTES

one solution: consistent & independent lines cross
infinite solutions: consistent & dependent same line
no solution: inconsistent parallel lines

8 0

3 years ago

Read 2 more answers

What is the solution of the system of linear equations?

Monica [59]

-3x+4y=-18
2x-y=7
the answer qould be C.(2,-3)
-3(2)+4(-3)=-18
-6+(-12)=-18
-18=-18

2(2)-(-3)=7
4+3=7
7=7

C.

8 0

3 years ago

Read 2 more answers

If 0°<0<90° and sin0=12/13, find cos0 using trigonometric identities.

Aleks04 [339]

here's the solution,

we know :

$\sin( \theta) = \dfrac{perpendicular}{hypotenuse}$

So,

$\dfrac{p}{h} = \dfrac{12}{13}$

so.. let the perpendicular be 12x and hypotenuse be 13x

now,

by applying pythagoras theorem,

$b {}^{2} = h {}^{2} - p {}^{2}$

where,

b = base
h = hypotenuse
p = perpendicular

So,

$b {}^{2} = ({13x})^{2} - ({12x})^{2}$
$b {}^{2} = 169x {}^{2} - 144x {}^{2}$
${b}^{2} = 25x {}^{2}$
$b = 5x$

so,

$\cos( \theta) = \dfrac{b}{h}$

$\cos( \theta) = \dfrac{5x}{13x}$

$\cos( \theta) = \dfrac{5}{13}$

hope it helps !!

3 0

3 years ago

a test consists of 10 true false questions to pass a test a student must answer at least six questions correctly if a student gu

Delicious77 [7]

Answer:

$P(X \geq 6) = P(X=6) +P(X=7) +P(X=8) +P(X=9) +P(X=10)$

And using the probability mass function we got:

$P(X=6)=(10C6)(0.5)^6 (1-0.5)^{10-6}=0.205$

$P(X=7)=(10C7)(0.5)^7 (1-0.5)^{10-7}=0.117$

$P(X=8)=(10C8)(0.5)^8 (1-0.5)^{10-8}=0.0439$

$P(X=9)=(10C9)(0.5)^9 (1-0.5)^{10-9}=0.0098$

$P(X=10)=(10C10)(0.5)^{10} (1-0.5)^{10-10}=0.000977$

And adding the values we got:

$P(X\geq 6) = 0.377$

The best answer would be:

D. 0.377

Step-by-step explanation:

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=10, p=0.5)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

For this case in order to pass he needs to answer at leat 6 questions and we can rewrite this:

$P(X \geq 6) = P(X=6) +P(X=7) +P(X=8) +P(X=9) +P(X=10)$

And using the probability mass function we got:

$P(X=6)=(10C6)(0.5)^6 (1-0.5)^{10-6}=0.205$

$P(X=7)=(10C7)(0.5)^7 (1-0.5)^{10-7}=0.117$

$P(X=8)=(10C8)(0.5)^8 (1-0.5)^{10-8}=0.0439$

$P(X=9)=(10C9)(0.5)^9 (1-0.5)^{10-9}=0.0098$

$P(X=10)=(10C10)(0.5)^{10} (1-0.5)^{10-10}=0.000977$

And adding the values we got:

$P(X\geq 6) = 0.377$

The best answer would be:

D. 0.377

8 0

3 years ago

21 square root of $42.84

jekas [21]

21√$42.84 ≈ 21√42.84=137.449773

Hope this helps~!

5 0

3 years ago