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aivan3 [116]
2 years ago
15

Can someone give me a step by step explanation because my teacher doesn’t teach us anything? :(

Mathematics
1 answer:
Alex2 years ago
7 0

Answer:

(7x^2 -1)(x - 2).

Step-by-step explanation:

7x^3 - 14x^2 - x + 2

We can factor this by grouping - that is factoring the first 2 terms and the last 2:

= 7x^2(x - 2)  - 1(x - 2)      <-- the x - 2 is common to both parts so we have:

(7x^2 -1)(x - 2).

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What is the square root of pi?
qwelly [4]

The square root of Pi is approximately 1.77245.

6 0
3 years ago
Factor the GCF: 30a3b4 + 20a2b2 - 15ab3. Please help
Blizzard [7]

Answer:

The GCF for the variable part is ab².

GCF<em>Variable</em>=ab²

Multiply the GCF of the numerical part 5 and the GCF of the variable part ab².

5ab²

Step-by-step explanation:

8 0
3 years ago
Find the solution of this system of equations. Separate the x- and y-values with a comma. x - 4y = 12 and x - y = 0
Elenna [48]
Use elimination and subtitution method to solve the problem.
First, eliminate x and you'll find the value of y
x - 4y = 12
x -  y  = 0
--------------- - (substract)
     -3y = 12
        y = 12/-3
        y = -4

Second, subtitute -4 as y and you'll find the value of x
x - y = 0
x- (-4) = 0
x + 4 = 0
x = -4

The solution
x,y = -4,-4
6 0
3 years ago
An equation of a trend line for the scatter plot below is y=42x+50. Predict how many more sales the store makes in December than
Alexxx [7]

Answer: 42 more sales in December

8 0
3 years ago
6 1/42 + 4 5/6= simplest form + show work.
marissa [1.9K]

Answer:

1. 10 6/7      2. 8/15

Step-by-step explanation:

1. 6 1/42 + 4 5/6

  • First, let's combine the whole numbers.  6 + 4 = 10
  • Now we are left with 1/42 + 5/6.
  • To add or subtract, the dominators need to be the same. We need to find the least common multiple which here is 42.

1/42 + 5/6(7)

1/42 + 35/42

= 36/42

= 6/7

  • All we have to do is combine both numbers.

10 6/7

2. 13/15 - 1/3(5)

13/15 - 5/15

8/15

6 0
3 years ago
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