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ra1l [238]
3 years ago
7

Simplify. 1/4n - 1/2 / n/5 - 1/20n

Mathematics
1 answer:
Shtirlitz [24]3 years ago
4 0
The answer to your question is 2n^2 - 25/10n
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In how many ways can a gymnastics team of 4 be chosen from 9 gymnasts?
lisov135 [29]
In two ways. 4+4 is 8 your not supposed to go ober 9
5 0
3 years ago
The vertices of ΔRST are R(–1,–1), S(–1,11) and T(4,11). Which could be the side lengths of a triangle that is similar but not c
Step2247 [10]
The side lengths could be 10, 24 and 26 units.

We must first find the side lengths.  We use the distance formula to do this.

For RT:
d=\sqrt{(11--1)^2+(-1--1)^2}
\\=\sqrt{(11+1)^2+(-1+1)^2}
\\=\sqrt{12^2+0^2}=\sqrt{144}=12

For ST:
d=\sqrt{(11-11)^2+(4--1)^2}
\\=\sqrt{0^2+(4+1)^2}=\sqrt{5^2}=\sqrt{25}=5

For TR:
d=\sqrt{(11--1)^2+(4--1)^2}
\\=\sqrt{(11+1)^2+(4+1)^2}=\sqrt{12^2+5^2}=\sqrt{144+25}=\sqrt{169}=13

Our side lengths, from least to greatest, are 5, 12 and 13.

To be similar but not congruent, the side lengths must have the same ratio between corresponding sides but not be the same length.  10, 24 and 26 are all 2x the original side lengths, so this works.
5 0
3 years ago
Please give me the correct answer
MariettaO [177]

Answer:

Step-by-step explanation:

slant height = l = 15 mm

radius = r = 7 mm

Surface area of cone = πr (l + r) square units

                                  = 3.14 * 7 *(15 + 7)

                                  = 3.14 * 7 * 22

                                 = 483.56 square mm

8 0
2 years ago
Joyce had business cards made through a printing company. They charge an initial fee of $12 and $3.99 for each box of 100 busine
saw5 [17]

Answer:

$31.95

Step-by-step explanation:

The total cost is the initial fee plus the cost of the boxes.

12 + 5×3.99 = 31.95

4 0
3 years ago
Help please :( help please :( help please :( help please :( help please :( help please :( help please :( help please :( help ple
marin [14]
The second one t=250d because 5000 divided by 20 =250
3 0
2 years ago
Read 2 more answers
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