3 years ago

All rectangles are parallelograms. True False

Mathematics

1 answer:

navik [9.2K]3 years ago

3 0

Answer:

false

Step-by-step explanation:

Not all parallelograms are rectangles, only some of them are.

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A group of students calculated their average score at a spelling bee. They realized that if one of them scored 9 more points, th

alukav5142 [94]

Answer: There are 4 students in the group.

Step-by-step explanation:

Let the number of students in the group be n

If one of them scored 9 more points , their average score would be 81 points.

So, our equation (1) will be

$\frac{\sum x+9}{n}=81\\\\\sum x+9=81n$

Similarly,

If one of them scored 3 points less, their average score would be 78 points.

So, our equation (2) will be

$\frac{\sum x-3}{n}=78\\\\\sum x-3=78n$

So, from equation (1) and (2) we get:

$81n-9=\sum x=78n+3\\\\81n-9=78n+3\\\\81n-78n=3+9\\\\3n=12\\\\n=\frac{12}{3}\\\\n=4$

Hence, there are 4 students in the group.

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3 years ago

Jordan is makinga garden

jeka94

Answer:

( x + 10 )

Step-by-step explanation:

→ Divide x² + 13x + 30 by x + 3

( x + 3 ) ( x + 10 )

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3 years ago

Selena is a waitress. She earns $2.50 per hour plus tips. Last weekend, Selena eamed

viva [34]

Answer: more than

Step-by-step explanation:

If you divide 175/2.5 you get 70

That is the amount of hours she worked

So therefor she worked over 50 hours

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P3. (3+5 points) Let k be any natural number. (a) Prove that for every positive integer n, we have σk(n) = σ−k(n)n k . Conclude

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Answer:

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Step-by-step explanation:

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3 years ago

Help!!! Which equation is represented by the graph below?

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Answer:

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Step-by-step explanation:

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