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3 years ago

If n is an integer and can be written in expanded form....

Mathematics

1 answer:

aksik [14]3 years ago

4 0

Log(10^-3) = log(0.001) = -3, and there are 3 zeros inclusive of the 0 before the decimal.

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Mathematicians 4: Who is Who?

larisa86 [58]

Answer:

a. x = -9 or x = -2

b. -5(x - 4)

c. x = -3 or x = 5

d. x = ±7

Step-by-step explanation:

a. First person;

y = x² + 11x + 18

y = x² + 9x + 2x + 18

y = x(x + 9) + 2(x + 9)

y = (x + 9)(x + 2)

y = x = -9 or x = -2

b. Second person;

y = -5x + 20

The common factor is 5.

y = -5(x - 4)

c. Third person;

y = x² - 2x - 15

y = x² - 5x + 3x - 15

y = x(x - 5) + 3(x - 5)

y = (x + 3)(x - 5)

y = x = -3 or x = 5

d. Fourth person;

y = x² - 49

Applying the difference of squares formula;

(a² - b²) = (a - b)(a + b)

y = x² - 49 = x² - 7² = (x - 7)(x + 7)

y = (x - 7)(x + 7)

y = x = ±7

6 0

2 years ago

Sector area definition

solong [7]

Definition: The number of square units it takes to exactly fill a sector of a circle.

Do you want the exact equation? arc length is Area= rl/2 and arc length is the same as sector area

8 0

3 years ago

Sophia needs $47 to go on a field trip. She has saved $11.50. She earns $6.50 per hour cleaning her neighbor's garden, and she e

laiz [17]

a) Yes, because the total will be $48
hope i helped

6 0

3 years ago

The diagram shows the plans for the triangular part. How much longer is BC then AC

faust18 [17]

Answer:

Choice 2.

Step-by-step explanation: do 3x^2+10x-8, distribute AC -(15x+4), and you would get -15x-4. Combine like terms, and get 3x^2-5x-12

4 0

3 years ago

Read 2 more answers

The tables below show four sets of data:

vovangra [49]

Answer:

Hence, the set that represent a negative linear association between x and y is:

Set A.

Step-by-step explanation:

We are given 4 sets of data as:

Set A

x 1 2 3 4 5 6 7 8 9

y 10 9 8 7 6 5 4 3 2

Set B

x 1 2 3 4 5 6 7 8 9

y 3 4 5 6 7 8 9 10 11

Set C

x 1 2 3 4 5 6 7 8 9

y 8 6 5 4 3.5 3 2.5 2 2

Set D

x 1 2 3 4 5 6 7 8 9

y 1 2.5 2.5 3 4 5 6 8 9

We are asked to determine the set which represent negative linear association between x and y?

Clearly in Set B and Set D the values of y keeps on increasing as the value of x increases; hence they both represent a positive linear association between x and y.
In set C the relationship is non-linear though it is negative.
Clearly in Set A we could see that the the y is related to x as:

y=11-x or y= -x+11.

Hence, clearly we could see that the relationship is linear and also negative as the value of y keeps on decreasing with increasing x.

Hence, the set that represent a negative linear association between x and y is:

Set A.

3 0

3 years ago

Read 2 more answers