1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alchen [17]
10 months ago
12

Which expression is a factor of 21x2 + 13x – 20?A. 3x – 4B. 7x - 5C. 7x + 4D. 3x + 5

Mathematics
1 answer:
LUCKY_DIMON [66]10 months ago
8 0

Answer:

B. 7x - 5

Explanation

Given the expression 21x^2 + 13x – 20, to get which of the given expression is a factor we will have to factorize the equation first as shown;

21x^2 + 13x – 20

= 21x^2 + 28x - 15x - 20

= 7x(3x+4) -5(3x+4)

= (7x-5)(3x+4)

Hence one of the factors is 7x - 5

You might be interested in
150 parents were surveyed. 26% said that the kids were noddy and 70% said their kids were nice. How many parents didn't answer w
alexandr1967 [171]

Answer:

The parents who didn't answer with either naughty and nice are <u>6</u>.

Step-by-step explanation:

Given:

150 parents were surveyed. 26% said that the kids were naughty and 70% said their kids were nice.

Now, to find parents who didn't answer with either naughty and nice.

<em>So, as given in question:</em>

<em>70% said that their kids are naughty.</em>

<em>26% said that their kids are nice.</em>

So, to get the percentage of parents who didn't answer we subtract.

<em>Thus, the percentage of  parents who didn't answer with either naughty and nice:</em>

100% - (70% + 26%)

100% - 96% = 4%.

Hence, 4% of parents didn't answer.

Now, to get how many  parents didn't answer we calculate the percentage of the total who didn't answer:

<em>Total parents surveyed = 150.</em>

<em>Parents who didn't answer =  4% of the total parents surveyed.</em>

Parents\ who\ didn't\ answer = 4\% of 150.

Parents\ who\ didn't\ answer = \frac{4}{100}\times 150.

Parents\ who\ didn't\ answer = \frac{600}{100}.

Parents\ who\ didn't\ answer = 6.

Therefore, the parents who didn't answer with either naughty and nice are 6.

8 0
3 years ago
What is 4387 times 9 solved out
tamaranim1 [39]

Answer:

4387 x 9 = 39,483

Step-by-step explanation:

Please consider giving me Brainliest

darrylh3333

Hope this helps

:)

8 0
3 years ago
Drag the blue movable points to produce a graph that correctly represents the inequality
posledela

Link Provided in other answer is a SCAM !!! Do NOT CLICK ON IT !!!
4 0
2 years ago
A scientist wants to research the potential spread of germs by contact. she knows that the number of possible handshakes within
Viefleur [7K]
Given that <span>the number of possible handshakes within a group of n people is given by the equation:

</span>N= \frac{1}{2} (n^2-n)
<span>
Given that there are 105 people at a party, the number of possible handshakes is given by:

</span>N= \frac{1}{2} (105^2-105) \\  \\ = \frac{1}{2} (11025-105)=10920<span>
</span>
8 0
3 years ago
If a regular polygon has exterior angles that measure approximately 17.14º each, how many sides does the polygon have?
mr Goodwill [35]
Exterior angles for n sides = 360/n = 17.14, n = 360/17.14 = <span>21 sides</span>
6 0
2 years ago
Other questions:
  • What is the equation of the line that is parallel to the line y − 1 = 4(x + 3) and passes through the point (4, 32)?
    10·1 answer
  • Factor the following expression, and verify that the factored expression is equivalent to the original: 16x²-8x-3
    15·1 answer
  • List some states whose shapes are not polygons
    15·2 answers
  • Order the fractions from least to greatest: 2/3,5/6,29/36,8/9. Briefly explain your method.
    15·1 answer
  • Please solve for x z=m+x
    12·1 answer
  • A circle has a diameter of 40 in. Find the circumference of the circle to the nearest tenth. Use 3.14 for pi .
    11·1 answer
  • Find the area of the triangle. Round your answer to the nearest tenth. Triangle ABC Line AB =15 yd, Line AC = 15 yd, ∠A= 48° a.
    5·1 answer
  • Solve for y.<br><br><br><br> y - 12 = -10<br><br> y = 2<br> y = -22<br> y = 22<br> y = -2
    10·2 answers
  • Help me with math pls 20 pints show work !
    8·1 answer
  • Need help i don't know what im doing?​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!