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
Cerrena [4.2K]
3 years ago
8

(-3x)²-(3x-2)²-6*(2x-1.5)

Mathematics
1 answer:
Ilya [14]3 years ago
4 0
Without the instructions, I can only assume that you are to "expand the given expression."

Following order of operations rules requires that (3x-2)^2 and -6(2x-1.5) be evaluated first.

(3x-2)^2 = 9x^2 - 12x + 4   and    -6(2x-1.5) = -12x + 9

Then we have 9x^2 - (9x^2 - 12x + 4) -12x + 9

the 9x^2 terms cancel, leaving  us with 12x - 4 - 12x + 9 = 5 (answer)

You might be interested in
Which one of the following statements is true? (5 points)
DanielleElmas [232]

Answer:

  None of these statements are true.

Step-by-step explanation:

a) The derivative of (fg)(x) is f'g +fg' according to the product rule for derivatives.

__

b) The derivative of |x² +x| is a 3-part piecewise linear function equal to 2x+1 for |x+1/2| > 1/2, and equal to -2x-1 for |x+1/2| < 1/2. It is undefined for x=0 and x=1.

__

c) for y = √f(x), y' = f'(x)/(2√f(x))

8 0
3 years ago
What is the sum of the geometric series
lbvjy [14]
If S denotes the sum of the first n terms of a geometric series with first term a and common ratio r, then

S=a+ar+ar^2+\cdots+ar^{n-3}+ar^{n-2}+ar^{n-1}
rS=ar+ar^2+ar^3+\cdots+ar^{n-2}+ar^{n-1}+ar^n
\implies S-rS=a+(ar-ar)+(ar^2-ar^2)+\cdots+(ar^{n-1}-ar^{n-1})-ar^n
\implies (1-r)S=a(1-r^n)
\implies S=a=\dfrac{1-r^n}{1-r}

Using summation notation, you have

S=\displaystyle\sum_{x=1}^nar^{x-1}=\sum_{x=0}^{n-1}ar^x=a\dfrac{1-r^n}{1-r}

In this case, you have a=2, r=\dfrac12, and n=16. So the value of the sum is

\displaystyle\sum_{x=0}^{15}2\left(\frac14\right)^x=2\dfrac{1-\left(\frac14\right)^{16}}{1-\frac14}\approx2.67

Rounded to the nearest whole number, the answer would be 3.
4 0
3 years ago
Read 2 more answers
In the accompanying diagram of parallelogram ABCD, LaTeX: m\angle A=x+17 m ∠ A = x + 17 and LaTeX: m\angle C=2x-4 m ∠ C = 2 x −
jek_recluse [69]
Answer:
x = 21

Explanation:
In a parallelogram, each two opposite angles are equal.

In the given parallelogram ABCD, we can note that angles A and C are opposite angles. This means that they have equal measures.

Therefore:
∠A = ∠C
x + 17 = 2x - 4
17 + 4 = 2x - x
x = 21

We can check:
angle A = 21 + 17 = 38°
angle C = 2(21) - 4 = 38°
They are equal

Hope this helps :)

3 0
3 years ago
Solve the inequality.show work. (r+3)&gt;7
skelet666 [1.2K]
First you subtract 3 from both sides. 3-3 and 7-3, that cancels out 3 which leaves you with r>4.


6 0
3 years ago
How many solutions does this system have?
BigorU [14]

12x - 4y = -8

y = 3x + 2

Rewrite the first equation

12x + 8 = 4y

3x + 2 = y

As you see, the first and second equation are actually the same, meaning there's an infinite number of solutions.

6 0
3 years ago
Read 2 more answers
Other questions:
  • In parallelogram KLMN, KN = 10, MN = 7 and mK = 50°
    12·2 answers
  • An institute surveyed small business owners across a state that employed 50 or fewer employees. The purpose of the study was to
    9·1 answer
  • Someone PLEASE help
    5·2 answers
  • 3x+4 greater than 16
    13·1 answer
  • Four more than thrice a number is greater than forty
    5·1 answer
  • What is the slope formula​
    14·1 answer
  • Please answer this correctly
    12·1 answer
  • 2/3 to the nearest cent​
    6·1 answer
  • Shape 2 (2.5,-0.5) , (4,-1.5) , (2.5,-2) , (2.5,-.5)
    5·2 answers
  • What is the circumference of the given circle in terms of л
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!