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stepladder [879]
3 years ago
6

For the past two years Lynda Santana has recorded the costs of operating her car. They total $1,600 (fixed costs) and $2,134 (va

riable costs). She has driven a total of 14,000 miles. What was her cost per mile?
Mathematics
2 answers:
zmey [24]3 years ago
6 0
Add the cost and divide by how many miles she drove:
1,600 + 2,134 / 1,400 =
3,734 / 1,400 = 2.66 (rounded to nearest decimal point)
So, Lynda paid roughly 2.66 per mile.
Marta_Voda [28]3 years ago
5 0
Total cost=fixed cost+variable cost
Total cost=1,600+2,134=3,734

Her cost per mile
3,734÷14,000=0.27 per mile
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Evaluate the expression a2+6ab for a=−3 and b=4.
inn [45]
First you plug in the variables:

(-3)(2)+(6)(-3)(4)

Multiply:
-6+(-18)(4) 
-6+-72

Add and your answer comes out to be:
-78

5 0
3 years ago
Evaluate the line integral using the fundamental theorem of line integrals. use a computer algebra system to verify your results
mario62 [17]
\dfrac{\partial f}{\partial x}=\cos x\sin y\implies f(x,y)=\sin x\sin y+g(y)

\dfrac{\partial f}{\partial y}=\sin x\cos y=\sin x\cos y+\dfrac{\mathrm dg}{\mathrm dy}
\implies\dfrac{\mathrm dg}{\mathrm dy}=0\implies g(y)=C

f(x,y)=\sin x\sin y+C

\displaystyle\int_{\mathcal C}\cos x\sin y\,\mathrm dx+\sin x\cos y\,\mathrm dy=\int_{\mathcal C}\mathbf f\cdot\mathrm d\mathbf r=f\left(\frac{3\pi}2,\frac\pi2\right)-f(0,-\pi)=-1
7 0
3 years ago
16,42 greatest common factor
kozerog [31]
2

42 ÷ 2 = 21
16 ÷ 2 = 8

Let's try the other factors of 42...

42 ÷ 6 = 7
16 ÷ 6 = 2.66
No...

42 ÷ 7 = 6
16 ÷ 7 = 2 2/7
No...

42 ÷ 14 = 3
16 ÷ 14 = 1.1428
No...
7 0
4 years ago
Anyone know the answer?
vodomira [7]
To solve your question, you add all of the measurements together, set them equal to 180, solve for x, and plug x back in for whichever angle they are asking for; in this case, they want angle R 

7x + 12x + 20 + 20x - 35 = 180
39x - 15 = 180
39x = 180 + 15
39x = 195
x = 5

Angle R = 12x + 20
12(5) + 20
60 + 20
80

Option C is your answer. 
5 0
3 years ago
Danielle earns a 8.25% commission on everything she sells at the electronics store where she works. She also earns a base salary
Mariulka [41]

Answer: her sales last week was $4300.

Step-by-step explanation:

Let x represent her her sales in a week.

Danielle earns a 8.25% commission on everything she sells at the electronics store where she works. This means that the commission she gets if she makes sales of $x is 0.0825x

She also earns a base salary of $675 per week. The expression for the total earnings for a week in which she made sales of $x would be

0.0825x + 675

if her total earnings for last week were $1,029.75, it means that

0.0825x + 675 = 1029.75

0.0825x = 1029.75 - 675

0.0825x = 1029.75 - 675

0.0825x = 354.75

x = 354.75/0.0825

x = $4300

3 0
3 years ago
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