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lord [1]
3 years ago
6

What is (1-7x)(1+9x)

Mathematics
2 answers:
Vikentia [17]3 years ago
7 0

Answer:

1+2x-63x^2

Step-by-step explanation:

factor 1(1+9x)=1+9X

-7x(1+9x)=-7x-63x^2

add 1+9x-7x-63x2

Sveta_85 [38]3 years ago
5 0

ANSWER

(1-7x)(1+9x) =-  63 {x}^{2} + 2x + 1

EXPLANATION

The given product is (1-7x)(1+9x).

Expand using the distributive property.

(1-7x)(1+9x) = 1(1 + 9x) - 7x(1 + 9x)

(1-7x)(1+9x) = 1 + 9x - 7x -  63 {x}^{2}

Simplify to obtain:

(1-7x)(1+9x) = 1 + 2x -  63 {x}^{2}

You can rewrite in standard form to get,

(1-7x)(1+9x) =-  63 {x}^{2} + 2x + 1

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2/3 + 3/4=? (pls show the steps on how you got an awnser :) )
shepuryov [24]

Answer:

17/12= 1 5/12

Step-by-step explanation:

Common denominator:

2/3= 8/12

3/4= 9/12

Solve:

8+9= 17

17/12= 1 5/12

8 0
3 years ago
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Simplify 3 to the power of 1
lina2011 [118]

3 to the power of 1 simplified, is just 3.

7 0
3 years ago
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The middle side of a triangle is half of 3 times the length of the shortest side. The longest side is 2 centimeters longer than
USPshnik [31]

<u>Answer:</u>  

The difference between the longest and shortest sides of the triangle is 4 cm.

<u>Explanation:</u>

<em>Step Number One:</em>

Let the shortest side of the triangle have a length of x.

The middle side of the triangle has a length that is half of 3 times the length of the shortest side. This can be written as 1/2*3x, which equals 3/2x.

The longest side of the triangle has a length that is 2 centimeters longer than the length of the middle side. This can be written as 3/2x + 2.

<em>Step Number Two: </em>

The perimeter of the triangle, which can be found by adding the lengths of all of the sides of the triangle, is 18 centimeters. This can be shown by the following equations:

Shortest Side + Middle Side + Longest Side = Perimeter

x + 3/2x + 3/2x + 2 = 18

4x + 2 = 18

4x = 16

x = 16/4

x = 4

<em>Step Number Three: </em>

This means that the shortest side of the triangle has a length of 4 centimeters and the longest side of the triangle has a length of 8 centimeters.

8 cm - 4 cm = 4 cm

--------------------------------------------------------------------------------------------------------------

Are you still confused? Not feeling confident in your ability to solve these types of problems? Some helpful topics to practice are listed below!

<u>Still confused on ...</u>

Step 1 - Practice equation solving!

Step 2 - Practice perimeter!

Step 3 - Practice addition and subtraction!

Remember: Certain problems may be tricky, but practice makes perfect!

--------------------------------------------------------------------------------------------------------------

<em>Answer by Math_Is_Me_123         </em>

7 0
3 years ago
Ines has saved $5. She doubles the amount she saves each week. Does the function have a constant difference or a constant ratio?
salantis [7]

Answer:

The function have a constant ratio

No, it does not represent an exponential function.

Step-by-step explanation:

As given,

Ines has saved $5. She doubles the amount she saves each week.

⇒ In first week she saved = $5

   In second week she saved = 2×$5 = $10

   In third week she saved = 2×$10 = 20

  In fourth week she saved = 2×$20 = 40

and so on..

∴ we get the series

5, 10, 20, 40 ,.......

If the series is given as a, b, c, d, ..... , then

The common difference is defined as d = b-a = c-b

The common ration is defined as r = \frac{b}{a} = \frac{c}{b}

Here, in the given question

The series is - 5, 10, 20, 40

This has no common difference , d =   10 - 5 (= 5 )≠ 20 - 10 (= 10)

As 5 ≠ 10

So the function does not define common difference .

Now,

This has common ratio , r =  \frac{10}{5} (=2) = \frac{20}{10}(=2)

As 2 = 2

So, the function represent common ratio

Now,

The function does not represent an exponential function because it is increased by common ratio.

7 0
3 years ago
What is 7 grams in milligrams?
hodyreva [135]

Answer:

7000 milligrams. hope this help

3 0
3 years ago
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