If xy is rational, must either x or y be rational?

Mathematics

2 answers:

VashaNatasha [74]3 years ago

6 0

B- No; because the product of two irrationals can also be rational

dalvyx [7]3 years ago

4 0

B) no; because the product of two irrationals can also be rational

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Which equation has the solution x = -4? 2(x - 4) = 16 3x + 6 - 2x = -2 (1/4)x + 4 = 3 (x + 6)3 = -6

Mrac [35]

Answer:

hello its (1/4)x+4=3

Step-by-step explanation:

4 0

3 years ago

A rectangular driveway has an area of 880 square feet and a perimeter of 128 feet. What are the dimensions of the driveway?

mamaluj [8]

Answer:

Dimensions are 20 X 44 feet

Step-by-step explanation:

First we need to build two equations:

For area X times Y = 880

For Perimeter 2x + 2y = 128

Now we need to solve one so we can substitute it into the other:

2x + 2y = 128 becomes

2x = 128 - 2y and then

x = 64 - y We will substitute this into the are equation

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factor out the negative

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Factor:

-(y - 20)(y - 44) = 0

y-20 = 0 and y - 44 = 0

y = 20 and y = 44

Plugging these in two both of our formulas works

20 X 44 = 880 for area

2(20) + 2 (44) = 128 for perimeter

8 0

3 years ago

A quadratic function and an exponential function are graphed below. How do the decay rates of the functions compareover the inte

Kobotan [32]

To check the decay rate, we need to check the variation in y-axis.

Since our interval is

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To compare the decay rates we need to check the variation on the y-axis of both functions.