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MAXImum [283]
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?
Mathematics
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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Classify the following triangle check all that apply. 98,41,41
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Answer:

B. Isosceles triangle

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3 years ago
Which of the following is the equation of a line perpendicular to the line y =
makvit [3.9K]

Answer:

y = \frac{1}{10} x + \frac{13}{2}

Step-by-step explanation:

The equation of a line in slope- intercept form is

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y = - 10x + 1 ← is in slope- intercept form

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Given a line with slope m then the slope of a line perpendicular to it is

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To find c substitute (5, 7) into the partial equation

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5 0
3 years ago
If <img src="https://tex.z-dn.net/?f=%283x%2B5%29%5E2%3Dax%5E2%2Bbx%2Bc" id="TexFormula1" title="(3x+5)^2=ax^2+bx+c" alt="(3x+5)
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Answer:

64

Step-by-step explanation:

(3x+5)^2 = ax^2 +bx+c

FOIL the left side

(3x+5) (3x+5)

9x^2 +15x+15x+25

Combine like terms

9x^2 +30x+25

a=9

b= 30

c= 25

a+b+c = 9+30+25 = 64

4 0
3 years ago
Read 2 more answers
What is 9/8 times 250 and also what is 1 1/6 times 250
solong [7]
9/8 x 250 = 281 1/4 or 281.25
1 1/6 x 250 = 291 2/3 or <span>291.66</span>
4 0
3 years ago
Read 2 more answers
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