How many pairs of parallel sides does a trapezoid have? none/ one/ three/ two

Mathematics

1 answer:

telo118 [61]3 years ago

3 0

A trapezoid has two parallel sides, but the top one is shorter than the bottom one

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1!+2(2!)+3(3!)+...+n(n!)=(n+1)!-1

anyanavicka [17]

Step-by-step explanation:

OK, let's assume it this way:

Sn=1.1!+2.2!+3.3!+...+n.n!=(2‐1).1!+(3-1).2!+(4-1)3!+...+((n+1)-1).n!

Sn=1.1!+2.2!+3.3!+...+n.n!=(2‐1).1!+(3-1).2!+(4-1)3!+...+((n+1)-1).n!=(2.1!-1!)+(3.2!-2!)+(4.3!-3!)+...+((n-1)n!-n!)=(2!-1!)+(3!-2!)+(4!-3!)+

Sn=1.1!+2.2!+3.3!+...+n.n!=(2‐1).1!+(3-1).2!+(4-1)3!+...+((n+1)-1).n!=(2.1!-1!)+(3.2!-2!)+(4.3!-3!)+...+((n-1)n!-n!)=(2!-1!)+(3!-2!)+(4!-3!)+...+(n+1)!-n!=(n+1)!-1!=(n+1)!-1

and boom problem solved

7 0

2 years ago

Helphelphelphelphelp

VashaNatasha [74]

The ratio is supposed to be pennies to total amount of coins. The total amount of coins--including pennies--is 16. This can be proven by this equation:

5 + 6 + 5 = 16

Now you put the ratio together by taking the amount of pennies (5) and total amount of coins (16). Your ratio should look like this:

5:16

Hope I helped you out! ❤❤

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3 years ago

The width of the rectangle is 75% of its length, the length is 24, what's the area?

lapo4ka [179]

S = a * b where a - length and b - width
a = 24
b = 0.75 * a
S = 24 * 24 * 0.75 = 432

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3 years ago

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Amanda [17]

Solve for k by simplifying both sides of the equation, then isolating the variable.

k= 14/5

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4 years ago

The two dot plots compare ages of girls and boys in a pottery class.

mart [117]

Answer:

you didn't post a picture :/

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2 years ago