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1 year ago

12

20. Sofia paid $11.80 for a pen, a marker, and a binder. The marker cost $0.80 more than the pen. The binder cost 4 times as muc

h as the marker. What was the cost of the pen?

2 answers:

7nadin3 [17]1 year ago

7 0

Answer:

$1.30

Step-by-step explanation:

Let x = the cost of the pencil

Let x + .80 = the cost of the pen

Let 4(x + .80) = the cost of the binder

x + x + .80 + 4(x + .80) = 11.80

2x + .80 + 4x + 3.20 = 11.80

6x + 4.00 = 11.80

6x = 7.80

x = $1.30

x + .80 = $2.10

4(x + .80) = $8.40

svp [43]1 year ago

6 0

$1.30
Just did the problem and got it correct!

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the question in English

Mateo will reproduce a photo measuring 5 cm per side on a scale of 3/4

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Will the size of the copy be larger or smaller than the original?

we know that

the scale factor is equal to $\frac{3}{4}$

Let

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we have that

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substitute the values

$y=\frac{3}{4}*5=3.75\ cm$

therefore

<u>the answer Part a) is </u>

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Part b)

we know that

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the size of the copy is------> $3.75*3.75=14.06\ cm^{2}$

so

$14.06\ cm^{2} < 25\ cm^{2}$

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<u>the answer part b) is</u>

The size of the copy be smaller than the original

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2 years ago

a plumber charges $55 for a service call plus $35 per hour. if the plumber’s bill was $160, how many hours was he there?

Allushta [10]

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3 years ago

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Triangle angle - sum theorem<br> what is the value of y?

dangina [55]

Answer:

y = 5

Step-by-step explanation:

All angle measures in a triangle add up to 180°.

This means that 63 + 82 + 7y = 180

<u>Solving for Y:</u>

Step 1: Combine like terms.

$(7y) + (63+82)=180$
$7y + 145 = 180$

Step 2: Subtract 145 from both sides.

$7y + 145 - 145 = 180 - 145$
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Step 3: Divide both sides by 7.

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Step 4: Check if solution is correct.

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Therefore, y = 5.

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Given:

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The graph of the given system of inequalities.

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Therefore, the graph of the given system of inequalities is shown below.

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