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marissa [1.9K]
3 years ago
13

On a buying trip in Los Angeles Rosario Perez ordered 120 pieces of jewelry a number of bracelets at $8 each and a number of nec

klaces at $11 each. She wrote a check for $1080 to pay for the order. How many bracelets and how many necklaces did Rosaria purchase?
Mathematics
1 answer:
Crazy boy [7]3 years ago
3 0

Answer:

Two equation system

80 bracelets

40 necklaces

Step-by-step explanation:

x+y=120

8x+11y=1080

x=120-y

8(120-y) +11y=1080

x=120-y

960-8y+11y=1080

x=120-y

3y=120

x=120-y

y=40

x=120-40

y=40

x=80

y=40

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The rate in

\frac{ {m}^{3} }{ {m}^{2} }  \: is \:0.25\frac{ {m}^{3} }{ {m}^{2} }

<h3>How to find rate is riya applying mulch in m^3/m^2 ?</h3>

given that riya applies it at a rate of 250,000 cm^3 of mulch for every m^2 of garden space.

we already know that 1m = 100cm.

so, each side of this cube is 100cm in length.

so,100 \times 100 \times 100 \: {cm}^{3}  \: in \:  {m}^{3}

To find what is the volume in cubic metres.

\frac{250000}{10000000}  =  \frac{1}{4}  = 0.25 \frac{ {m}^{3} }{ { m}^{2} }

so, the rate is0.25 \frac{ {m}^{3} }{ {m}^{2} }

Learn more about problems on garden, refer :

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Disclaimer : This question was given incomplete on portal.Here is complete question.

Question : Riya is applying mulch to her garden.She applies it at a rate of 250,000 cm^3 of mulch for every m^2 of garden space. At what rate is riya applying mulch in m^3/m^2

8 0
2 years ago
9. P(no more than 16 | prime
koban [17]
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7 0
2 years ago
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juin [17]

Answer:

8

Step-by-step explanation:

use trig functions

2 sides and 1 angle given

Sides given

  • hypotenuse -> x
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Angle

  • 30˚

trig function associated with hyp and opp is sin

sin(x) = opp/hyp

substitute

sin 30˚ = 4/x

solve for x

0.5 = 4/x

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7 0
3 years ago
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weeeeeb [17]
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3 years ago
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Answer:

Equation: 6f = 5

Result: 6/5 cup of flour is needed for each batch of bread

Step-by-step explanation:

Given

6 cups of flour makes 5 batches of bread

Required

His much flour is needed for each batch.

Let f represent a cup of flour.

The statement "total of 6 cups of flour to make 5 batches of bread." means that

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The above equation will give the number of cup needed for 1 batch of bread.

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And the result is: 6/5 cup of flour is needed for each batch of bread

3 0
3 years ago
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