3 years ago

If U = {1, 3, 5, 7, 9, 11, 13}, then which of the following are subsets of U.

Mathematics

1 answer:

lana [24]3 years ago

6 0

Answer:

Step-by-step explanation:

It is C because members in the set C can be found in the universal set (U)

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Tickets for a concert are $40 for main-floor seats and $25 for upper level seats. A total of 2000 concert tickets were sold. The

Tems11 [23]

Step-by-step explanation:

to show how many tickets were sold:

x = upper floor tickets

y = main floor tickets

x + y = 2000

to show total amount of revenue:

25x + 40y = 62,000

Finding answer using both equations:

x + y = 2000

multiply each side by 25

25x + 25y = 2000 × 25

25x + 25y = 50,000

25x + 40y = 62,000

25x + 25y = 50,000

-----------------------------------

15y = 12,000

^ this is column subtraction

^ this column subtraction is done to isolate y so we can work with one value rather than 2

15y = 12,000

divide each side by 15

12,000 ÷ 15 = 800

y = 800

x + y = 2000

x + 800 = 2000

x = 1200

Therefore 1200 upper-level tickets were sold

800 main floor tickets were sold

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3 years ago

I need help with this 1. Find the area and perimeter of the shape. Show work.

balu736 [363]

Answer:

Area= 28.274 $cm^{2}$

Perimeter= 21.425 cm

Step-by-step explanation:

This is a quadrant.

Formula for area of a quadrant= $\frac{1}{4} *\pi r^{2}$

Area= $1/4\pi *6^{2}$

Area= 28.274 $cm^{2}$

Formula for perimeter of a quadrant= $0.5\pi r+2r$

r=6cm

Perimeter= $0.5\pi*6 +(2*6)$

Perimeter= 21.425 cm

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Let's say the debt in the United States is now near 1.8 × 10^13 dollars and that there are about 300,000,000 people in the Unite

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Sent you a picture of the solution.

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-1/4 divided by 7/4 and show the work!

Goryan [66]

Answer:

-1/7

Step-by-step explanation:

$(-1/4)/(7/4) \\\\= (-1/4) * (4/7)\\ \\=-4/28\\=-1/7$

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4 years ago

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