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
Lady bird [3.3K]
3 years ago
6

Kylie explained that (–4x + 9)2 will result in a difference of squares because (–4x + 9)2 = (–4x)2 + (9)2 = 16x2 + 81. Which sta

tement best describes Kylie’s explanation?
Kylie is correct.
Kylie correctly understood that it is a difference of squares, but she did not determine the product correctly.
Kylie did not understand that this is a perfect square trinomial, and she did not determine the product correctly.
Kylie determined the product correctly, but she did not understand that this is a perfect square trinomial.
Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
4 0

The expression (-4x + 9)^2 cannot be equal to (-4x)^2 + 9^2 because it is actually equal to the product of two factors (3 + 2sqrt x) (3- 2 sqrt x). One cannot use obviously distributive property. Hence the answer to this problem should be C. as she did not understand both perfect square trinomial and did not determine the product 
gregori [183]3 years ago
4 0
The correct answer is: (C) <span>Kylie did not understand that this is a perfect square trinomial, and she did not determine the product correctly.

Explanation:
Kylie did not determine the product correctly, as the perfect-square trinomials are of the form:
</span>a^2x^2 \pm 2axb \pm b^2
<span>
and are expressed in the squared-binomial form as:
</span>(ax \pm b)^2
<span>
The correct product would be:
</span>(-4x + 9)^2 = (-4x)^2 + 2(-4)(9)x + (9)^2 = 16x^2 - 72x + 81

Hence the correct answer is that Kylie did not understand that this is a perfect square trinomial, and she did not determine the product correctly (Option C).

You might be interested in
Find the coordinates of the midpoint M of the segment with the given endpoints. Then find the distance between the two points. R
Mrac [35]

Answer:

Midpoint (-2,4)

distance nearest tenth = 8.9

The approximate distance = 9

Step-by-step explanation:

Formulas

PQ midpoint = (x2 + x1)/2, (y2 + y1)/2

distance d = sqrt( (x2 - x1)^2 + (y2 - y1)^2 )

Givens

x2 = -4

x1 = 0

y2 = 1

y1 = 7

Solution

M(PQ) = (-4+0)/2, (1 + 7)/2

M(PQ) = -2, 4

The midpoint is -2,4

The distance = sqrt( (4 - 0)^2 + (1 + 7)^2 )

The distance = sqrt(16 + 64)

The distance = sqrt(80)

The distance = 4√5           exactly

The distance = 8.94    

The distance = 8.9            To the nearest tenth

Question 2

The distance is rounded to the nearest whole number which is 9.

6 0
3 years ago
Lori wants to determine the average amount of time that students at her school spend on a computer each day there are 350 studen
Bezzdna [24]

Answer:

2 students from each 15 classrooms

Step-by-step explanation:

"The number of boys and girls is approximately equal" is probably the most random sample, that is if the whole topic of the publication is Lorrie and her experimenting endeavors. If that is not the subject, then "Lorrie wants to determine the average amount of time that students at her school spend on the computer each day" is the most strange and random

3 0
3 years ago
The yearly cost in dollars, y, at a video game arcade based on total game tokens purchased, x, is y = x + 60 for a member and y
morpeh [17]
<span>We have the yearly cost in dollars y at a video game arcade based on total game tokens purchased x. So we know that:

</span>y=x+60:\ equation \ for \ a \ member<span>

</span>y=x:\ equation \ for \ a \ nonmember<span>
</span><span>
Then we can study this problem by using the graph in the figure below. We know that if there's no any purchase, the yearly cost for a member will be $60 and for a nonmember there will not be any cost. From this, we can affirm that the cost of membership is equal to $60.

On the other hand, both members and nonmembers will pay the same price on the total game tokens purchased, this is true because of the same slope that members and nonmembers have in the equations.</span>

8 0
3 years ago
Read 2 more answers
Find the seventh term of the following sequence 2,6,18, and 54
enot [183]
This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by <span>33</span> gives the next term. In other words, <span><span><span>an</span>=<span>a1</span>⋅<span>r<span>n−1</span></span></span><span><span>an</span>=<span>a1</span>⋅<span>r<span>n-1</span></span></span></span><span>.</span>
8 0
3 years ago
Georgie works 15 hours each week
katovenus [111]
Based on the given conditions, formulate: 200x3/15/4
600/15x4
600/60
Answer is 10
3 0
1 year ago
Other questions:
  • An old clock started to fall behind by one minute each day. It was too fragile to fix, but too beloved to stop. How slow was the
    5·1 answer
  • Which of the following number has terminating has terminating decimal expansion ?
    13·1 answer
  • I ned help whit ligninger
    7·1 answer
  • Which expression is equivalent to 64y18 – 1000z6?
    8·2 answers
  • The distance between points (3,7) and (x1,y1) is the square root of (x1 - 3)2 + (y1 - 7)2
    13·2 answers
  • Figure pQRS is a trapezoid. The area of triangle RST is 170 square centimeters. Find the total of the area shade regiond the bot
    11·1 answer
  • Solve the system using elimination.
    9·1 answer
  • Solve this system of equations: y = 7; y = -2x+1 *
    9·2 answers
  • Plz answer the question step by step<br>​
    5·1 answer
  • What equation in slope-intercept form represents the line that passes through the points (1, -6), (-3, 10).
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!