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3 years ago

Expand and simplify (x + 2)(x + 1)

Mathematics

2 answers:

Otrada [13]3 years ago

6 0

Answer:

x²+3x+2

Step-by-step explanation:

First you distribute the x, and then the 2.

x²+x+2x+2=x²+3x+2

Gwar [14]3 years ago

6 0

Answer:

x^2 +3x +2

Step-by-step explanation:

(x + 2)(x + 1)

x^2 +x +2x+2

x^2 +3x +2

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The price of an item yesterday was 130. Today, the price fell to 91 . Find the percentage decrease.

Shalnov [3]

Answer:

30%

Step-by-step explanation:

130-91=39

39 / 130 =0.3

0.3x100=30

and you got the answer!

7 0

3 years ago

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3. A company with loud machinery needs to cut its sound intensity to 44% of its original level. By how many decibels would the l

sergeinik [125]

Answer: 3. The correct option is: A) 3.57 decibels.

6. The correct option is: B) $ln(\frac{x^2}{c^5})$ 

Step-by-step explanation:

3. Sound intensity is cut to 44% of its original level. That means, if the original sound intensity was 100, then now sound intensity will be 44.

So, $I_{0}= 100$ and $I= 44$

Using the formula $L= 10log(\frac{I}{I_{0}})$ , we will get.....

$L= 10log(\frac{44}{100})\\ \\ L= 10log(0.44)\\ \\ L= 10(-0.3565...)=-3.565...\approx -3.57$

(Rounded to the nearest hundredth)

So, the loudness would be reduced by 3.57 decibels.

6. Given expression is: $2ln(x) - 5ln(c)$

First applying the property $m*log(x)= log(x^m)$ , we will get.....

$ln(x^2)-ln(c^5)$

Now using the formula, $log(a)-log(b)= log(\frac{a}{b})$ , we will get....

$ln(x^2)-ln(c^5) = ln(\frac{x^2}{c^5})$

Thus, the answer as a single natural logarithm is $ln(\frac{x^2}{c^5})$

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3 years ago

Last week marcella earned $432. Turing that week, she worked 8 hours for 4 days and 4 hours on one day. what was Marcella's pay

Step2247 [10]

The answer is approx. 10.8 per hour.

If you want to round it up, it would be 11. I prefer you not to round though as this is Money. Money should have decimals included.

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3 years ago

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If you invest $5000 in an account 10 years at a 3% interest rate, how much money will you have?

Tanya [424]

I=prt..... i=5000*10*0.03=1500 5000+1500=6500

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4 years ago

FIST ONE TO AWNSER AND CORRECT GETS BRAINLYIST AND 50 POINTS HURRY!!!!!!!!!!!!

ANEK [815]

Answer:

Step-by-step explanation:

It is because you can see the line pass through the value 0 in x-axis while 6 in y-axis which gives the first coordinate (x,y) = (0,6) and the line also past through the value of 5 in x-axis and 1 in y-axis which gives the second coordinate is (1,5).

So it is true that the line did go through at points (0,6) and (1,5).

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3 years ago

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