3 years ago

There are 800 students at O'Farrell. 40% of the students chose hybrid learning. How many

Mathematics

1 answer:

Ghella [55]3 years ago

3 0

Answer:

840

Step-by-step explanation:

800+40=840

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1. If y + 1/y = 2 cos teta find y

k0ka [10]

Answer:

Step-by-step explanation:

1+1/1=2

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3 years ago

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How is this problem factored? 35x^2-57x-44

faust18 [17]

You can use the quadratic formula with it which will be easier
or simple factoring
it will be (5x-11)(7x+4)

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3 years ago

Prove each statement that is true and ﬁnd a counterexample for each statement that is false. Assume all sets are subsets of a un

tekilochka [14]

Answer with Step-by-step explanation:

We are given that A, B and C are subsets of universal set U.

We have to prove that

$A\cap (B-C)=(A\cap B)-(A\cap C)$

Proof:

Let x $\in A\cap (B-C)$

Then $x\in A$ and $x\in(B-C)$

When $x\in ( B-C)$ then $x\in B$ but $x\notin C$

Therefore, $x\in( A\cap B)$ but $x\notin (A\cap C)$

Hence, it is true.

Conversely , Let $x\in(A\cap B)$ but $x\notin(A\cap C)$

Then $x\in A$ and $x\in B$

When $x\notin ( A\cap C)$ then $x\notin C$

Therefor, $x\in A\cap (B-C)$

Hence, the statement is true.

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3 years ago

Find the mean absolute<br>deviation of the set of data.<br>3, 8, 10, 12, 15

Westkost [7]

The mean is 9.6
3+8+10+12+15= 48/5= 9.6

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3 years ago

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Is 25x²-40xy+16y²a perfect square number? why?

Crank

Answer:

yes

Step-by-step explanation:

25x² - 40xy + 16y² can be factored as

(5x - 4y)² ← a perfect square

8 0

2 years ago