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
blagie [28]
3 years ago
14

Write a polynomial of least degree with rational coefficients, a leading coefficient of 1, and zeros at 3 and sqr root 7. Expand

your answer and write it in standard form
Mathematics
1 answer:
Tresset [83]3 years ago
6 0

Answer:

(x-3)(x^2-7) = x^3 -3x^2 -7x + 21

just change the sign of the root and put x in front of it, then multiply the factors all together

(x-3)(x-sqr7)(x+sqr7)    roots come in conjugate pairs to eliminate irrational coefficients

(x-sqr7)(x+sqr7) = x^2-7.  similar to (a-b)(a+b) = a^2-b^2

Step-by-step explanation:

You might be interested in
A farmer is going to divide her 30 acre farm between two crops. Seed for corn costs $15 per acre. Seed for wheat costs $30 per a
Deffense [45]

Answer:

$3200

Step-by-step explanation:

The total area of land is 30 acre. Let x represent the area in acre that corn is planted and y represent the area in acre that wheat is planted. Therefore:

x + y = 30               (1)

Also, the farmer can spend at most $750 on seeds. Corn cost $15 per acre, maize cost $30 per acre. Hence:

15x + 30y ≤ 750      (2)

Also, x and y > 0

The profit is given by the function:

Profit = 100x + 110y

Graphing equation 1 and equation 2 and solving, we get the points:

(10, 20)

Hence the maximum profit is at:

Max profit = 100(10) + 110(20) = $3200

8 0
3 years ago
Which relation is a function?
Luden [163]

A relation is <em>not</em> a function if it has repeated "x" values.

A. (3, _) repeats

B. is a function

C. (5, _) repeats

D. (-4, _) repeats

8 0
3 years ago
In the expression 2a-5+4a-9, name the constants​
Vika [28.1K]

Answer:

-5 and -9 are the constants, can also be written -14

4 0
3 years ago
How do I do this, I really need some help
meriva
You solve for x and get x<-2 or x>= -1/2 and then graph

4 0
3 years ago
Can anyone Help me pleasee ?
3241004551 [841]

Answer:

First one

Step-by-step explanation:

.20 is 20% of 100 and there is 5 boxes and 5 times 20 = 100

6 0
3 years ago
Other questions:
  • Compare the y-intercepts and the rates of change of the following items. A. The y-intercepts are the same, but the rates of chan
    8·1 answer
  • How to cheat using my math lab ?
    14·2 answers
  • Which set of ordered pairs does not represent a function?
    11·1 answer
  • Help me
    9·1 answer
  • Just 5&amp;4 please, will give brainliest and many pts
    9·1 answer
  • 2. If tan 0 = 3/4, find Sin 20​
    12·1 answer
  • What is clustering?
    7·2 answers
  • Dusty is dividing 700 pencils into groups of 25 for each classroom. How many classrooms are there?
    5·2 answers
  • X/2 = y/3 <br>find value of x, y if x+y =30<br><br>​
    13·1 answer
  • What is an equation of the line that passes through the points (-8, 2) and (-4, -3)?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!