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3 years ago

Find the product. Tell which strategy you need. 9 x 199

Mathematics

2 answers:

arsen [322]3 years ago

5 0

The product is another word for multiplying so 9* 199 is 1791

kherson [118]3 years ago

4 0

All you need to do is multiply it so it will be 1,791

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Two subtracted from b is greater than -18

Ber [7]

(b-2)>-18
OR
-18+(b-2)

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3 years ago

Find a ·<br> b. |a| = 80, |b| = 50, the angle between a and b is 3π/4.

mart [117]

Answer:

$a\cdot b=-2000\sqrt{2}$

Step-by-step explanation:

Given information: |a| = 80, |b| = 50, the angle between a and b is 3π/4.

We need to find the dot product a · b.

The formula of dot product is

$a\cdot b=|a||b|\cos \theta$

where, θ is the angle between a and b.

Substitute the given values in the above formula.

$a\cdot b=(80)(50)\cos (\frac{3\pi}{4})$

$a\cdot b=4000\cos (\pi-\frac{\pi}{4})$

$a\cdot b=-4000\cos (\frac{\pi}{4})$ $[\because \cos (\pi-\theta)=-\cos \theta]$

$a\cdot b=-4000\frac{1}{\sqrt{2}}$

$a\cdot b=-\frac{4000}{\sqrt{2}}$

Rationalize the above equation.

$a\cdot b=-\frac{4000}{\sqrt{2}}\times \frac{\sqrt{2}}{\sqrt{2}}$

$a\cdot b=-\frac{4000\sqrt{2}}{2}$

$a\cdot b=-2000\sqrt{2}$

Therefore, the value of a · b is $a\cdot b=-2000\sqrt{2}$ .

7 0

2 years ago

Read 2 more answers

Ion understand this-

leva [86]

Answer:

2nd one

Step-by-step explanation:

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2 years ago

If the number of people is greater than the number of segments each person will get less than one segment

babymother [125]

Is this even a question, it seems to be more of a statement..

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2 years ago

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gogolik [260]

Answer:

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and 70% didnt

Step-by-step explanation:

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2 years ago