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k0ka [10]
3 years ago
11

Is the answer a, b, c, or d?

Mathematics
1 answer:
yaroslaw [1]3 years ago
4 0

Answer:

Tally marks

Step-by-step explanation:

It is most likely tally marks because all of the other options are more recent than option b the Greek and Latin letters are dated to be closer to the modern times than the cavemen were.

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9x (4 + 3) + 8 x 6 = what is the answer??​
Georgia [21]

Answer:

111

Step-by-step explanation:

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4 years ago
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Please please help please
il63 [147K]

Answer:

6 times larger

Step-by-step explanation:

First, find the area of both.

Mary: 4*5.5=22

Lisa: 24*5.5=132

Then find what multiplied by 22 would equal 132. This is easy because it's a multiple-choice question.

22*20=440, so A is incorrect

We already know they are not equal, so then B can be crossed out

22*3=66, C would be incorrect

Leaving the only choice left to be the correct answer

22*6=132

4 0
3 years ago
Need the answer to the question
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2 years ago
If one yard equals 3 ft in one mile equals 5280 ft how many yards are there in 2 miles
Georgia [21]

Answer:

2 miles = 3520 yards

Step-by-step explanation:

1 mile = 1760 yards

2 miles = 3520 yards

5 0
3 years ago
Plot the point whose polar coordinates are given. Then find two other pairs of polar coordinates of this point, one with r >
Ira Lisetskai [31]

Answer:

The other pairs are:

(a)\ (2, \frac{5\pi}{6}) \to  (2, \frac{17\pi}{6}) and (-2, \frac{23\pi}{6})

(b)\ (1, -\frac{2\pi}{3}) \to (1, \frac{4\pi}{3}) and (-1, \frac{7\pi}{3})

(c)\ (-1, \frac{5\pi}{4}) \to (-1, \frac{3\pi}{4} ) and (1, \frac{7\pi}{4})

See attachment for plots

Step-by-step explanation:

Given

(a)\ (2, \frac{5\pi}{6})

(b)\ (1, -\frac{2\pi}{3})

(c)\ (-1, \frac{5\pi}{4})

Solving (a): Plot a, b and c

See attachment for plots

Solving (b): Find other pairs for r > 0 and r < 0

The general rule is that:

The other points can be derived using

(r, \theta) = (r, \theta + 2n\pi)

and

(r, \theta) = (-r, \theta + (2n + 1)\pi)

Let n =1 ---- You can assume any value of n

So, we have:

(r, \theta) = (r, \theta + 2n\pi)

(r, \theta) = (r, \theta + 2*1*\pi)

(r, \theta) = (r, \theta + 2\pi)

(r, \theta) = (-r, \theta + (2n + 1)\pi)

(r, \theta) = (-r, \theta + (2*1 + 1)\pi)

(r, \theta) = (-r, \theta + (2 + 1)\pi)

(r, \theta) = (-r, \theta + 3\pi)

(a)\ (2, \frac{5\pi}{6})

r = 2\ \ \ \ \theta = \frac{5\pi}{6}      

So, the pairs are:

(r, \theta) = (r, \theta + 2\pi)

(2, \frac{5\pi}{6}) = (2, \frac{5\pi}{6} + 2\pi)

Take LCM

(2, \frac{5\pi}{6}) = (2, \frac{5\pi+12\pi}{6})

(2, \frac{5\pi}{6}) = (2, \frac{17\pi}{6})

And

(r, \theta) = (-r, \theta + 3\pi)

(2, \frac{5\pi}{6}) = (-2, \frac{5\pi}{6} + 3\pi)

Take LCM

(2, \frac{5\pi}{6}) = (-2, \frac{5\pi+18\pi}{6})

(2, \frac{5\pi}{6}) = (-2, \frac{23\pi}{6})

The other pairs are:

(2, \frac{17\pi}{6}) and (-2, \frac{23\pi}{6})

(b)\ (1, -\frac{2\pi}{3})

r = 1\ \ \ \theta = -\frac{2\pi}{3}      

So, the pairs are:

(r, \theta) = (r, \theta + 2\pi)

(1, -\frac{2\pi}{3}) = (1, -\frac{2\pi}{3} + 2\pi)

Take LCM

(1, -\frac{2\pi}{3}) = (1, \frac{-2\pi+6\pi}{3})

(1, -\frac{2\pi}{3}) = (1, \frac{4\pi}{3})

And

(r, \theta) = (-r, \theta + 3\pi)

(1, -\frac{2\pi}{3}) = (-1, -\frac{2\pi}{3} + 3\pi)

Take LCM

(1, -\frac{2\pi}{3}) = (-1, \frac{-2\pi+9\pi}{3})

(1, -\frac{2\pi}{3}) = (-1, \frac{7\pi}{3})

The other pairs are:

(1, \frac{4\pi}{3}) and (-1, \frac{7\pi}{3})

(c)\ (-1, \frac{5\pi}{4})

r = -1 \ \ \ \ \theta = \frac{-5\pi}{4}

So, the pairs are

(r, \theta) = (r, \theta + 2\pi)

(-1, \frac{-5\pi}{4}) = (-1, \frac{-5\pi}{4} + 2\pi)

Take LCM

(-1, \frac{-5\pi}{4}) = (-1, \frac{-5\pi+8\pi}{4} )

(-1, \frac{-5\pi}{4}) = (-1, \frac{3\pi}{4} )

And

(r, \theta) = (-r, \theta + 3\pi)

(-1, \frac{-5\pi}{4}) = (-(-1), \frac{-5\pi}{4}+ 3\pi)

Take LCM

(-1, \frac{-5\pi}{4}) = (1, \frac{-5\pi+12\pi}{4})

(-1, \frac{-5\pi}{4}) = (1, \frac{7\pi}{4})

So, the other pairs are:

(-1, \frac{3\pi}{4} ) and (1, \frac{7\pi}{4})

5 0
3 years ago
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