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
Damm [24]
2 years ago
5

I’m not sure how to do this please help

Mathematics
1 answer:
Nikolay [14]2 years ago
3 0

Answer:

B :step 2   she didnt collect all the like terms and calculate

Step-by-step explanation:

first rewrite  remove all (  )Parentheses

2nd   collect all like terms and calculate

a^4 + 7a -16 -12^a^3 + 5a -3

a^4 + 12a - 19 - 12a^3     ( Like terms are 7a +5a  and -16 +-3)

so she skipped the second step

You might be interested in
Iana started to evaluate the function f(x) = 2x2 – 3x + 7 for the input value 2.
Sati [7]
The answer is nine because 2(4)=8   3(2)=6   7=7, os 8-6+7= 2+7 =9
5 0
3 years ago
Read 2 more answers
What is 2 times 2 2/5
Komok [63]

Answer:

4.8 or 4 4/5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Factorise 2x^2 - 3x -2 < 0
Galina-37 [17]
Step 1: Factor 2 x^{2} - 3x -2
1. <span> Multiply 2 by -2, which is -4.</span>
2. <span>Ask: Which two numbers add up to -3 and multiply to -4?
</span>3. <span>Answer: 1 and -4
</span>4. Rewrite -3x as the sum of x and -4x

2 x^{2} +x-4x-2\ \textless \ 0


Step 2: <span>Factor out common terms in the first two terms, then in the last two terms.

</span>x(2x+1)-2(2x+1)\ \textless \ 0
<span>
Step 3: </span>Factor out the common term 2x+1

(2x+1)(x-2)\ \textless \ 0

Step 4: Solve for x

1. Ask: When will (2x+1)(x-2) equal zero?
2. Answer: When 2x + 1 = 0 or x-2=0
3. <span>Solve each of the 2 equations above:

</span>x=- \frac{1}{2} ,2
<span>
Step 5: </span>From the values of x <span>above, we have these 3 intervals to test.
x = < -1/2
-1/2 < x < 2
x > 2

Step 6: P</span><span>ick a test point for each interval

</span>For the interval x\ \textless \ - \frac{1}{2} &#10;
Lets pick x=-1. Then, 2(-1) ^{2} -3 * -1 -2 \ \textless \  0
After simplifying, we get 3\ \textless \ 0, Which is false. 
Drop this interval.
<span>
For this interval - \frac{1}{2} \ \textless \ x\ \textless \ 2
Lets pick x=0. Then, 2* 0^{2} - 3 * 0-2\ \textless \ 0. After simplifying, we get -2\ \textless \ 0, which is true. Keep this <span>interval.

For the interval </span>x\ \textgreater \ 2

Lets pick x = 3. Then, 2 * 3  ^{2} -3*3-2\ \textless \ 0. After simplifying, we get 7\ \textless \ 0, Which is false. Drop this interval.

.Step 7: Therefore, 
- \frac{1}{2} \ \textless \ x\ \textless \ 2

Done! :)</span>
4 0
3 years ago
How many solutions can a single variable linear equation contain?
dimaraw [331]
No solution is  the correct answer i  think
6 0
3 years ago
Which two expressions have the same value?<br> 1. 23-82<br> 2. 23 - (8 x 2)<br> 3. (23 -8) x 2
Elza [17]

Answer:

Any expression doesn't have the same value

Step-by-step explanation:

<h3>1. 23-82</h3>

Subtract 82 from 23.

−59

<h3>2. 23 - (8 x 2)</h3>

Simplify each term.

Multiply 8 by 2.

23−1⋅16

Multiply −1 by 16.

23−16

Subtract 16 from 23.

7

<h3>3. (23 -8) x 2</h3>

Subtract 8 from 23.

15⋅2

Multiply 15 by 2.

30

<h2>Hope it is helpful.....</h2>
6 0
2 years ago
Other questions:
  • Whats the answer to this problem?
    13·2 answers
  • Evaluate 2(x + 1) – 3 when x=6<br><br> A. 10<br> B. 8<br> C. 11<br> D. 5en x = 6.
    12·2 answers
  • What do you get when you put 1 and 1 together?!!?
    12·1 answer
  • What is the quotient of 0.72 ÷ -0.9
    13·2 answers
  • A baseball pitcher has 60 2/3 innings. what is the number of innings written as a decimal?
    15·1 answer
  • How to do vertical and horizontal lines in a graph
    15·2 answers
  • A rectangular field has a length of 42.14 meters. The length is 4.3 times as long as the width.
    10·2 answers
  • A rectangular prism is 10 inches long, 5 inches wide, and 6 1/2 inches tall. What is the volume in cubic inches of the prism?
    13·1 answer
  • Nick has $32. He buys 5 packs of trading cards that cost $3 each and a display book that costs $7. Simplify the expression 32-(5
    12·1 answer
  • You are having a bake sale to raise money for your athletic team to buy t-shirts. Someone donated $10 and you plan on selling ca
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!