All categories

3 years ago

Which expression is not a polynomial?

Mathematics

1 answer:

jasenka [17]3 years ago

5 0

Answer:

1) D

2) D

3) C

4) B

5) C

6) A

7) C

Step-by-step explanation:

1) A polynomial contains integral positive degrees of x .

Though 5 does not contain x, we can take as x power 0

But 3^(1/2)+5 contains no x term, and an irrational term.

Hence option D

2) Grouping like terms and write in descending powers of x we get

d. 9x^3-x^2-x-4 is right answer

3) [4x^2-4x+5] - [3x^2-6x+2] = [4x^2-4x+5] - 3x^2+6x-2

= X^2+2x+3

So option c

4) By multiplication we get product as

B. 10x^2-7x-12

5) Rectangle area = length x width = (2h-1) (4h+3)

= 8h^2+2h-3

Option C

6) Take common factor b outside

Answer is a. 3b (2b^2+3b-4)

7) Use the identity a^2-b^2

C. (2x+5)(2x-5) is answer

You might be interested in

Divide 33 photos into 2 groups so the ratio is 4 to 7

lapo4ka [179]

First you'll need two equations ( you can use any variables you want)
A= photo group 1
B= photo group 2
First equation:
A + B = 33
This is because the total number of photos from both groups is 33
Second equation:
4A = 7B
This is because the ratio is 4:7 so for every four photos in group A there must be 7 photons in group B.
Then take the first equation A + B = 33 and subtract B from both sides. Making the equation A = 33 - B
Then with that equation, substitute it in for equation 2 and it will look like this. 4(33-B) = 7B
Then distribute the 4 to the 33 and the -B making the equation 132 - 4B = 7B
Then add 4B to each side
Making the equation 132 = 11B
Then to get B by itself you must divide each side by 11 making the equation 132/11 = B which simplifies to 12 = B
Then plug in 12 for B in the first equation like this A + 12 = 33
Then subtract 12 on each side of the equation to isolate A so A = 21

So
A = 21
B = 12

4 0

4 years ago

Solve the system of equations.

Anon25 [30]

Answer:

x = -2y

Step-by-step explanation:

Step 1. x + 2y = 0

Step 2. x + 0 = -2y

Step 3. x = -2y

3 0

3 years ago

Alexandra is following a recipe that requires 3/4 a cup of water she needs to make 10 servings how many cups of water does Alexa

Licemer1 [7]

Answer:

Amount of water needed for 10 serving = 7.5 cup

Step-by-step explanation:

Given:

1 serving needed water = 3/4 cup

Find:

Amount of water needed for 10 serving

Computation:

Amount of water needed for 10 serving = 10[3/4]

Amount of water needed for 10 serving = 7.5 cup

6 0

3 years ago

A 12 sided die is rolled find the probability of rolling a two

Allushta [10]

Answer:

1/12

Step-by-step explanation:

so we know the total you have is a 12 dice cube yes? yes.

there fore you denomanator is the the total of everything-12.

there's only 1 #2 on the 12 sided dice this cause you to get 1/12

7 0

2 years ago

The diagonals of a rhombus are 14 and 48cm. Find the length of a side of the rhombus.

FromTheMoon [43]

Step-by-step explanation:

Let ABCD be a rhombus. So, AC (AC = 14 cm) and BD (BD=48 cm) will be its diagonals. Let us assume that diagonals are intersecting at point O.

Since, diagonals of a rhombus are perpendicular bisector.

$\because \: OA = \frac{1}{2} \times AC \\ \\ \therefore \: OA = \frac{1}{2} \times 14 \\ \\ \huge \red{ \boxed{\therefore \: OA = 7 \: cm}} \\ \\ \because \: OB = \frac{1}{2} \times BD \\ \\ \therefore \: OB = \frac{1}{2} \times 48 \\ \\ \huge \red{ \boxed{\therefore \: OB = 24 \: cm}} \\ \\ In \: \triangle OAB, \: \: \angle AOB=90° \\ \therefore \: by \: Pythagoras \: Theorem \\ AB= \sqrt{OA^2 +OB^2 } \\ = \sqrt{7^2 +24^2 } \\ = \sqrt{49+576 } \\ = \sqrt{625 } \\ \huge \orange{ \boxed{\ \therefore \:AB= 25 \: cm.}}$

Hence, length of a side (or all) is 25 cm.

3 0

4 years ago