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
Verdich [7]
3 years ago
14

Victoria was given the expression 5x - 4x^2-1+X-8x^2+7 and asked to

Mathematics
2 answers:
Nadya [2.5K]3 years ago
7 0

Answer:  -6(2x+1)(x-1)

Step-by-step explanation:

Given the expression in the form 5x-4x^2-1+x-8x^2+7, we know that Victoria can simplify it by adding the like terms:

-12x^2+6x+6

She can also factor out -6:

-6(2x^2-x-1)

Now, she needs  to factor the coefficient of the second term rewrite it as (1-2), then:

-6(2x^2+(1-2)x-1)

-6(2x^2-2x+x-1)

Now she needs to group the terms as following:

-6[(2x^2-2x)+(x-1)]

And factor out 2x:

-6[2x(x-1)+(x-1)]

Finally, she has to factor out (x-1). Therefore, she gets:

-6(2x+1)(x-1)

vfiekz [6]3 years ago
3 0

Answer:

-12x^2+6x+6

this is the answer for ap ex

You might be interested in
Departure 5:15 am arrival 11:15 am what is the answer to total flight time
natima [27]

Answer:

6 hours of flight time  I believe

Step-by-step explanation:

3 0
3 years ago
For bone density scores that are normally distributed with a mean of 0 and a standard deviation of​ 1, find the percentage of sc
gogolik [260]

Answer:

a) The percentage of bone density scores that are significantly high is 2.28%

b) The percentage of bone density scores that are significantly low is 2.28%

c) The percentage of bone density scores that are not significant is 95.44%

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

a. significantly high​ (or at least 2 standard deviations above the​ mean).

This is 1 subtracted by the pvalue of Z = 2.

Z = 2 has a pvalue of 0.9772

1 - 0.9772 = 0.0228

2.28% of scores are signifcantly high

b. significantly low​ (or at least 2 standard deviations below the​ mean).

pvalue of Z = -2

Z = -2 has a pvalue of 0.0228

2.28% of scores are signicantly low.

c. not significant​ (or less than 2 standard deviations away from the​ mean).

pvalue of Z = 2 subtracted by the pvalue of Z = -2.

Z = 2 has a pvalue of 0.9772

Z = -2 has a pvalue of 0.0228

0.9772 - 0.0228 = 0.9544

95.44% of the scores are not significant

7 0
3 years ago
Kayla owns a food truck that sells tacos and burritos. She sells each taco for $3 and each burrito for $7.25. Yesterday Kayla ma
Trava [24]
Let t = the number of tacos sold
Let b = the number of burritos sold
3t + 7.25b = 595
B=2t
4 0
3 years ago
Beth Rides a Train every winter for 236 miles for 4 hours. If she rides 236 miles for 4 hours, how many miles does she travel fo
e-lub [12.9K]
59 miles here we use division
8 0
3 years ago
Read 2 more answers
Calculate the discriminant and use it to determine how many real-number roots the equation has.
Vladimir79 [104]
In a quadratic equation with the general formula of:

ax^2 + bx + c = 0

The discriminant is equal to b^2 - 4(a)(c). If the answer is a perfect square, then there are two real numbers. If not, then there are no real number root.

The discriminant for this equation is

(-6)^2 - 4(3)(1) = 24

Since 24 is not a perfect square, there are no real number roots.
4 0
3 years ago
Other questions:
  • 4. The rental for a television set changed from $80 per year to $8 per month
    7·1 answer
  • Which of the following are one-dimension and have infinite length
    5·1 answer
  • How to do this question plz answer my question plz ​
    12·1 answer
  • Mitch ordered several baseball hats for 12.65 each and paid $3.99 for shipping. If Mitch spent a total of $130.49, how many base
    14·1 answer
  • Solve for X<br> Enter the answer in the box<br> X=
    12·2 answers
  • What is the change in elevation between 8,500m and 3,400m?
    13·1 answer
  • Wuch of the foliwing expressions has the greatest volume -​
    10·1 answer
  • Solve for x.<br> Enter the solutions from least to greatest.<br> 2x^2– 5 = 13
    13·1 answer
  • 12. A store charges a restocking fee for any returned item based upon the
    7·1 answer
  • Identify the x and y coordinates of the ordered pair (-5, 9)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!