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AleksAgata [21]
3 years ago
12

A letter to Europe from the United States cost $.94 to mail. A letter mailed within the United States cost $.44. Nancy mailed fi

ve letters for $3.70, some to Europe and some to the United States. How many letters did she send to Europe. Explain.
Mathematics
1 answer:
frosja888 [35]3 years ago
7 0

Answer:

3

Step-by-step explanation: i used my calculator

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Q7: Determine the graph of the polar equation r = 12/6+4n cos theta.
iVinArrow [24]

Answer:

Choice B

Step-by-step explanation:

The first step is to write the polar equation of the conic section in standard form by dividing the numerator and denominator by 6;

r=\frac{2}{1+\frac{2}{3}cos theta }

The eccentricity of this conic section is thus 2/3, the coefficient of cos theta. Clearly, the eccentricity is between o and 1 implying that this conic section represents an Ellipse.

Lastly, the ellipse will open towards the left since we have positive cos theta in the denominator. The only graph that meets the conditions is graph B.

3 0
3 years ago
Help me with this please!!
Mamont248 [21]

Answer: (2,7)

Midpoint formula = (\frac{x1,x2}{2} ,\frac{y1,y2}{2} )

1 + 3 / 2 = 2

5 + 9 / 2 = 7

7 0
3 years ago
Y= -27(x+4)³+1 the real zero(s) is (are)
rjkz [21]
\bf y=-27(x+4)^3+1\implies 0=-27(x+4)^3+1
\\\\\\
-1=-27(x+4)^3\implies \cfrac{-1}{-27}=(x+4)^3\implies \cfrac{1}{27}=(x+4)^3
\\\\\\
\sqrt[3]{\cfrac{1}{27}}=x+4\implies \cfrac{\sqrt[3]{1}}{\sqrt[3]{27}}=x+4\implies \cfrac{1}{3}=x+4\implies \cfrac{1}{3}-4=x
\\\\\\
-\cfrac{11}{3}=x
4 0
3 years ago
Match the proper noun to the common noun.
egoroff_w [7]
Uncle peter-relative

january-month

jesse owens-athlete

william shakespeare-author

sunday-day

chrysler-automobile
3 0
3 years ago
Read 2 more answers
What is the equation of the axis of symmetry for the parabola y equals negative start fraction one over two end fraction left pa
Pachacha [2.7K]
For the equation,
y = 1/2(x+3)^2 -5
The vertice is (-3,-5). Therefore the axis of symmetry is X = -3.
7 0
3 years ago
Read 2 more answers
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