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
OLEGan [10]
2 years ago
10

What is (x+5)(x-1) ? ( expanding brackets )

Mathematics
1 answer:
maks197457 [2]2 years ago
3 0

Answer:

x^2 + 4x - 5

Step-by-step explanation:

We need to simplify this

xx - 1 * x +5x - 5 * 1

Simplify further

x^2 + 4x - 5

Thus, we have our answer

You might be interested in
Write each set in the indicated form. If you need to use "" to indicate a pattern, make sure to list at least four elements of t
KatRina [158]

Complete question is;

Write each set in the indicated form.

If you need to use "..." to indicate a pattern, make sure to list at least four elements of the set.

As you answer below, remember that the natural numbers are just the counting numbers. This means that is not a natural number, and negative numbers are not natural numbers either.

(a) Roster form: {6,8,10,12,...}

Descriptive form:

(b) Descriptive form: The set of natural numbers greater than or equal to 3 and less than or equal to 6.

Roster form:

Answer:

A) Descriptive form: A set of even natural numbers that are greater than or equal to 6.

B) Roster form: {3, 4, 5, 6}

Step-by-step explanation:

A) We are given that the roster form is;

{6,8,10,12,...}

Now, the descriptive form is just a statement that describes the given roster form.

Now, we can see they are all even natural numbers and the least is 6 while after 12,we can see that the set continues.

Thus;

Descriptive form: A set of even natural numbers that are greater than or equal to 6.

B) We are given that the descriptive form is the set of natural numbers greater than or equal to 3 and less than or equal to 6.

This means the least number in the set is 3 while the highest number is 6.

Thus,the roster form is;

Roster form: {3, 4, 5, 6}

3 0
3 years ago
Write 300 + 90 + 4 + 0.5 + 0.07 in standard form
satela [25.4K]
300+90+4+0.5+0.07 \to \boxed{394.57}
7 0
3 years ago
Read 2 more answers
Consider the probability that no less than 92 out of 159 students will pass their college placement exams. Assume the probabilit
Yanka [14]

Answer:

0.2843 = 28.43% probability that no less than 92 out of 159 students will pass their college placement exams.

Step-by-step explanation:

I am going to use the binomial approximation to the normal to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed samples can be 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.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this problem, we have that:

p = 0.55, n = 159. So

\mu = E(X) = 159*0.55 = 87.45

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{159*0.55*0.45} = 6.27

Probability that no less than 92 out of 159 students will pass their college placement exams.

No less than 92 is more than 91, which is 1 subtracted by the pvalue of Z when X = 91. So

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

Z = \frac{91 - 87.45}{6.27}

Z = 0.57

Z = 0.57 has a pvalue of 0.7157

1 - 0.7157 = 0.2843

0.2843 = 28.43% probability that no less than 92 out of 159 students will pass their college placement exams.

5 0
3 years ago
Solve the following problem: 28 – 18 – 10. <br> A. 10 <br> B. 0 <br> C. 18 <br> D. 8
Vlad [161]
First suntract 10 from 28 as that is simpiler. 28-10= 18, subtract 18 and our answer is 0. Our answer is B. 0.
6 0
3 years ago
Read 2 more answers
Point P is presently located at the origin. Move P, and observe how the rotated Images change. Be sure that neither the images n
guapka [62]

Answer:

Plato sample answer:

5 0
3 years ago
Other questions:
  • Twice a number subtracted from four times a number, added to 15.
    15·1 answer
  • 50% of what number is 31
    5·2 answers
  • 22. What are the coordinates of the vertices of the rectangle centered at the origin with base 2b and height 2h?
    10·1 answer
  • The terminal side of θ passes through the point (−3,7). What is the exact value of sinθ in simplified form?
    5·1 answer
  • Estimate then answer the equation.
    14·1 answer
  • Mr. Herrera is going to
    6·1 answer
  • Plz show work, NEED HELP FAST PLZ
    11·1 answer
  • Fred has 32 ounces of cookie dough. If he used 0.56 ounces of cookie dough for each cookie, what is a reasonable estimate of how
    11·1 answer
  • The first three terms of a sequence are 6, 12, 30, . . .
    14·1 answer
  • Solve for d.<br> 41 = 12 d _ 7<br> d
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!