3 years ago

If x = 2 and y = 4, then xy =

Mathematics

2 answers:

Pavel [41]3 years ago

6 0

Answer:

Step-by-step explanation:

XY = X times Y

If you substitute them its 2 X 4

gogolik [260]3 years ago

5 0

8. You just multiply x and y together

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(Calculus help, 25 points, will give brainliest) Find the sum of the sigma notation below.

Andreyy89

$\displaystyle\sum_{i=3}^{10}(2i-9)=2\sum_{i=3}^{10}i-9\sum_{i=3}^{10}1$

Recall that

$\displaystyle\sum_{i=1}^n1=n$

$\displaystyle\sum_{i=1}^ni=\frac{n(n+1)}2$

Your sums start at $i=3$ , so in order to apply these formulas directly, you need to compensate for the missing first two terms:

$\displaystyle\sum_{i=3}^{10}1=\sum_{i=1}^{10}1-(1+1)=10-2=8$

$\displaystyle\sum_{i=3}^{10}i=\sum_{i=1}^{10}i-(1+2)=\frac{10\cdot11}2-3=52$

$\implies\displaystyle\sum_{i=3}^{10}(2i-9)=2\cdot52-9\cdot8=\boxed{32}$

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3 years ago

I need this done fast I will give Brainliest

Leto [7]

Answer:

Step-by-step explanation:

sorry if wrong

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2 years ago

Pls help i dont get it

baherus [9]

Answer:

What is it?

Step-by-step explanation:

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3 years ago

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Wade can type 800 words in a quarter of an hour. How many words per minute can Wade type?

Mumz [18]

Answer:

Quarter of an hour = 25 minutes

800 words in 25 minutes.

800 ÷ 25= 32

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2 years ago

The cost of vacation to a cabin resort for a night is $95 for each person. Each cabin also has to pay a $25 recreational equipme

Blababa [14]

(x) = 95x + 25 is correct, since the $25 cost is fixed, but the $95 cost increases as x increases.

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