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3 years ago

Evaluate the expressions for when x=-1, y=3, z=-2 z²+(x²)-y and x²(y²)(z²)

Mathematics

1 answer:

inessss [21]3 years ago

4 0

Answer:

Use https://www.bartleby.com/ it has helped me out a lot . Its actual tutors/teachers who answer your questions in about 30 minutes :)

Step-by-step explanation:

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Express 8.5454545454... as a rational number, in the form p/q where p and q are positive integers with no common factors.

zzz [600]

$x=8.\overline{54}\\
100=854.\overline{54}\\
100x-x=854.\overline{54}-8.\overline{54}\\
99x=846\\
x=\dfrac{846}{99}=\dfrac{94}{11}

$

5 0

2 years ago

keiko has bought 36pounds of dog food, she feed the dog 3/4 pound of food each meal. how many meals would this last

exis [7]

Answer:

48 meals

Step-by-step explanation:

36lbs ÷ 3/4lbs = 48

5 0

3 years ago

Factor 3a^2+6ab-24b^2

Monica [59]

(3a²+6ab-24²)= 3a(a+2b)x(4b)

7 0

2 years ago

Find the exact value of cos theta, given that sin thetaequalsStartFraction 15 Over 17 EndFraction and theta is in quadrant II.

vova2212 [387]

Answer:

$cos \theta = -\frac{8}{17}$

Step-by-step explanation:

For this case we know that:

$sin \theta = \frac{15}{17}$

And we want to find the value for $cos \theta$ , so then we can use the following basic identity:

$cos^2 \theta + sin^2 \theta =1$

And if we solve for $cos \theta$ we got:

$cos^2 \theta = 1- sin^2 \theta$

$cos \theta =\pm \sqrt{1-sin^2 \theta}$

And if we replace the value given we got:

$cos \theta =\pm \sqrt{1- (\frac{15}{17})^2}=\sqrt{\frac{64}{289}}=\frac{\sqrt{64}}{\sqrt{289}}=\frac{8}{17}$

For our case we know that the angle is on the II quadrant, and on this quadrant we know that the sine is positive but the cosine is negative so then the correct answer for this case would be:

$cos \theta = -\frac{8}{17}$

5 0

2 years ago

Find the distance between the two numbers on a number line. Write your answer as a decimal.

dangina [55]

Answer:

-0.574

Step-by-step explanation:

Subtract the two numbers to get the solution

7 0

2 years ago