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Nastasia [14]
3 years ago
13

6. Suppose you bought supplies for a party. Three rolls of streamers and 15 balloons

Mathematics
1 answer:
stiks02 [169]3 years ago
3 0

Answer:

Streamers are $2.50 each

Balloons are $1.50 each

Step-by-step explanation:

Make a system of equations

3s + 15b = 30

2s + 4b = 11

Solve by elimination: multiply the top equation by 2 and the bottom equation by -3.

6s + 30b = 60

-6s -12b = -33

18b = 27

b = 1.5

Plug in 1.5 as b to find s

3s + 15(1.5) = 30

3s +22.5 = 30

3s = 7.5

s = 2.5

The streamers are $2.50 and the balloons are $1.50

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4 years ago
What is the answer to > solve 4cos (theta/3) -2 = 0, over [0, 4pi)
Vesna [10]

Hello from MrBillDoesMath!

Answer:  

@ =   pi/3 (or 60 degrees) or @ = 7 pi/3 (or 420 degrees)


Discussion:

Let "@' denote the angle "theta". We are asked to find @ in the interval [0, 4 pi)

where

4cos(@) - 2 = 0.                Adding 2 to both sides

4 cos(@) - 2 +2 = 2  =>

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This implies that @ =   pi/3 (or 60 degrees) or @ = (pi/3 + 2pi) = 7 pi/3 (or 420 degrees)


Thank you,

MrB

5 0
3 years ago
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Mila [183]

Answer: 90%

Step-by-step explanation:

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6 0
4 years ago
Read 2 more answers
5.5B+4R=285, point, 5, B, plus, 4, R, equals, 28
svet-max [94.6K]

Answer:

$285

Step-by-step explanation:

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15:33

(Mark me the brainliest)
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