3 years ago

What is the length, in units, of the line segment with endpoints at (1, 4) and (3, 7)? Round your answer to the nearest tenth.

Mathematics

2 answers:

lions [1.4K]3 years ago

7 0

Answer:

Step-by-step explanation;

I think this is right

Zigmanuir [339]3 years ago

6 0

Answer:

The answer is 7.9 units for certain. (That's what it says on the back of the book.)

Step-by-step explanation:

I don't know how, however. Sorry :|

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Solve P = 8/3 R + 30 for R.

vampirchik [111]

Answer:

R = (3P-30)/8

Step-by-step explanation:

subtract 30 from each side to get:

P-30 = $\frac{8}{3}$ R

multiply each side by $\frac{3}{8}$ to get:

$\frac{3}{8}$ · P - 30 = R

R = (3P-30)/8

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3 years ago

Using Euler’s formula, how many edges does a polyhedron with 20 faces and 12 vertices have?

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Euler's formula for a polyhedron is given by:

$\begin{gathered} F+V=E+2 \\ \text{where,} \\ F=\text{faces} \\ V=\text{vertices} \\ E=\text{edges} \end{gathered}$

Make E, the subject of the formula:

$\begin{gathered} F+V=E+2 \\ E=F+V-2 \end{gathered}$

Put F = 20, V = 12, to obtain E,

$\begin{gathered} E=20+12-2 \\ E=30 \end{gathered}$

Therefore, there are 30 edges

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Step-by-step explanation:

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If each interior angle of a regular polygon measures 144 degrees, how many sides does the polygon have?

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180(n-2)=n*144 in our casesolving for n we obtain:36n = 360n=10 sidesCHECK!!!!!!!!!!!!!!!!!!!

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