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
asambeis [7]
3 years ago
15

Simplify: 4- (3 1)2 - 6 2 4 2. Combine like terms: 7x3 2x - 5x2 6 x 9 3x3 12x2 3. Simplify: (2x5- ... Multiply: 3x2(4x3 - 2x2 7x

- 4) 5. Evaluate: 6x2 ...
Mathematics
1 answer:
Lynna [10]3 years ago
5 0

Answer:

The complete question is defined in the attached file please find it.

Step-by-step explanation:

For question 1:

\to 4-(3+1)^2 - 6\div 2 +4 \\\\\to 4-(4)^2 - 6\div 2 +4\\\\\to 4-16 - 3 +4\\\\\to 4-19 +4\\\\\to 4-15\\\\\to -11

For question 2:

\to 7x^3 +2x -5x^2+6+ x+ 9+ 3x^3 +12x^2 \\\\\to 7x^3 +3x^3+12x^2 -5x^2+2x+x+9+6  \\\\\to 10x^3 +7x^2+3x+15  \\\\

For question 3:

\to (2x^5- 3x^2+4)-(x^5+2x^2+7)\\\\\to 2x^5- 3x^2+4-x^5-2x^2-7\\\\\to x^5- 5x^2-3\\\\

For question 4:

\to 3x^2(4x^3- 2x^2+7x -4) \\\\\to 12x^5- 6x^4+21x^3 -12x^2 \\\\

For question 5:

\to 6x^2+9x-7 \ \ \text{when} \ \ x=2\\\\\to 6(2)^2+9(2)-7 \\\\\to 6(4)+9(2)-7 \\\\\to 24+18-7 \\\\\to 24+11 \\\\\to 35

You might be interested in
HELPPP ME PLEASE I REALLY NEED HELP
aliya0001 [1]
<h3>Answer:   choice F) 12 & 1/2 square yards.</h3>

=====================================================

We'll use this formula

a & b/c = (a*c + b)/c

to convert from a mixed number to an improper fraction.

Let's convert the first mixed number to an improper fraction

a & b/c = (a*c + b)/c

3 & 3/4 = (3*4 + 3)/4

3 & 3/4 = 15/4

Repeat the same idea for the second mixed number as well

a & b/c = (a*c + b)/c

3 & 1/3 = (3*3 + 1)/3

3 & 1/3 = 10/3

--------------------

In short we have

  • 3 & 3/4 = 15/4
  • 3 & 1/3 = 10/3

Doing these conversions is useful to be able to multiply the values like so:

(15/4)*(10/3) = (15*10)/(4*3) = 150/12 = (6*25)/(6*2) = 25/2

Now use your calculator to find that 25/2 = 12.5

We can then say....

12.5 = 12 + 0.5 = 12 + (1/2) = 12 & 1/2

The answer is choice F) 12 & 1/2 square yards.

6 0
2 years ago
Four points are always coplanar if: Check all that apply. A. all of them are collinear B. they are not in the same plane. C. thr
pentagon [3]

They are collinear

they lie in the same plane

7 0
3 years ago
4^2 x 2<br> Please will give brainliests
vitfil [10]
4^2 = 16
16 x 2 = 32
32, Hope this helps!
4 0
3 years ago
Read 2 more answers
A unit vector lies in the xy plane, at an angle of 137 degrees from the x axis, with a positive y component. What is the unit ve
Fed [463]

Answer: ( -0.731,  0.682)

Step-by-step explanation:

The unit vector is defined as a vector that points in the same direction as our vector (137 degrees from the x-axis) and has a magnitude of 1.

Knowing the angle, is really simple to do it.

First, we know that for a radius R and an angle A, the rectangular coordinates can be written as:

x = R*cos(A)

y = R*sin(A)

And if we want that the magnitude/modulus of our vector to be 1, then R = 1, and we know that A = 137°

x = 1*cos(137°) = -0.731

y = 1*sin(137°) = 0.682

Then the unit vector is: ( -0.731,  0.682)

8 0
2 years ago
a business want to increase its number of employees by 65% to 20,460. How many employees does the company currently have?
Crazy boy [7]

Answer:

12,400

Step-by-step explanation:

Let the current employees be x

65% increase in number = 0.65x

If the total number of employees after the increase is 20,460, then;

x + 0.65x = 20,460

1.65x = 20,460

x = 20,460/1.65

x = 12,400

Hence the current number of employees is 12,400

5 0
3 years ago
Other questions:
  • Simplify each expression <br> 7x +5(x +3) +4x -x -2
    13·2 answers
  • Tan42 = 7 divided by x. what is the value of x?
    7·1 answer
  • Idk how to do this. Someone please help. This is a Geometry Honors class
    5·2 answers
  • A scientist studies the population of an insect colony. She begins her study with 10,000 insects in the colony and measures the
    13·1 answer
  • Add 20 7/12 + 4 2/10
    14·1 answer
  • Scott invests $1000 at a bank that offers 6% compounded annually. Write an equation to model the growth of the investment.
    8·2 answers
  • Can u answer this plz?
    10·1 answer
  • The area of a triangle is 72cm squared. if its base is 16cm, find his height.​
    5·2 answers
  • if you vertically stretch the absolute value parent function, f(x)=IxI, by a factor of 3, which of these equations is the new fu
    9·1 answer
  • A motorcycle consumes 5 gallons of gas for 300 miles and 7 gallons for 420 miles. Calculate the rate of change per gallon of gas
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!