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
kakasveta [241]
3 years ago
7

Factor –7x3 + 21x2 + 3x – 9 by grouping. What is the resulting expression?

Mathematics
2 answers:
sergeinik [125]3 years ago
4 0
Take the first 2 and take out -7x2. bringing it to (-7x2)(x-3)+(3x-9)
then take out 3 on the right side.
-7x^2 (x-3)+3 (x-3)
factors to (3-7x2)(x-3)
den301095 [7]3 years ago
4 0

Step-by-step explanation:

take the first 2 and take out -7x2. bringing it to (-7x2)(x-3)+(3x-9)

then take out 3 on the right side.

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

factors to (3-7x2)(x-3)

You might be interested in
The following is a parallelogram solve for the variables
Andrews [41]
X = 66 degrees. (Co interior angles are supplementary, add up to 180)

2y + 4 = y + 7
2y - y = 7 - 4
Y = 3
6 0
3 years ago
How can you find the length of ⎯⎯⎯⎯⎯⎯⎯⎯⎯
mestny [16]

Answer:

about 1 inch

Step-by-step explanation:

6 0
3 years ago
A pack of 9 toilet rolls costs £4.23
OleMash [197]
 a)  9 toilet rolls cost $ 4.23
       1 toilet roll costs  $ x

          9x = 4.23 * 1
           x= 4.23 / 9
            x = 0.47
So in first case one toilet roll costs $ 0.47.

b) 4 toilet rolls cost $1.96
    1 toilet roll costs  $ x
     
    4x = 1.96 * 1
     x = 1.96 / 4
     x = 0.49
So in second case one toilet roll costs $ 0.49.

0.47 < 0.49
The toilet roll in first case is cheaper than the toilet roll in second case.

Hope this heps!


8 0
3 years ago
1. The position of a particle moving along a coordinate axis is given by: s(t) = t^2 - 5t + 1. a) Find the speed of the particle
zimovet [89]

Answer: \left |  2t-5\right |,\ 2,\ 2t-5

Step-by-step explanation:

Given

Position of the particle moving along the coordinate axis is given by

s(t)=t^2-5t+1

Speed of the particle is given by

\Rightarrow v=\dfrac{ds}{dt}\\\\\Rightarrow v=\dfrac{d(t^2-5t+1)}{dt}\\\\\Rightarrow v=\left |  2t-5\right |

Acceleration of the particle is

\Rightarrow a=\dfrac{dv}{dt}\\\\\Rightarrow a=2

velocity can be negative, but speed cannot

\Rightarrow v=\dfrac{ds}{dt}\\\\\Rightarrow v=\dfrac{d(t^2-5t+1)}{dt}\\\\\Rightarrow v=2t-5

3 0
3 years ago
the volume of the rectangular prism shown below is 96 cubic feet. The dimensions of the prism base are 4 feet and 3 feet. What i
g100num [7]
Height=volume:base area
96:(4*3)= 96:12=8
7 0
2 years ago
Other questions:
  • Suppose that circles A and B have a central angle measuring 100°. Additionally, the measure of the sector for circle A is 10π m2
    14·2 answers
  • Scientific<br> Express this number in scientific notation.<br> 52 thousandths
    13·1 answer
  • What prediction is made for the year 1995?
    7·1 answer
  • What is the average of all numbers between -10 and 14, inclusive
    8·2 answers
  • Round each number to the nearest tenth. What is the best estimate for the difference of 264.72 128.49? A. 137 B. 136.3 C. 136.2
    9·2 answers
  • Find the area of each figure.<br>1.<br>12 m<br>8 m​
    14·1 answer
  • ??please help me solve​
    6·1 answer
  • Cora and Hannah measured how high their pet frogs could jump. Cora's jumped x inches,
    12·1 answer
  • The Hernandez family is evenly splitting 7 liters of gasoline between their 4 cars.
    15·2 answers
  • Sarah is paid $20 an hour at her new job. She wishes to graph her total pay y, as a function of the number of hours, x. She want
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!