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
Vedmedyk [2.9K]
3 years ago
10

PLZ HELP!!!!

Mathematics
1 answer:
masha68 [24]3 years ago
7 0
I think A might be wrong though
You might be interested in
How do I expand<br> 3(2y+1)
frozen [14]

Answer:

Answer is 6y+3

Step-by-step explanation:

The working step is at the diagram above:))

Thanks for moderators for helping me with my answer:))

4 0
3 years ago
2. If AB = 4x + 9. BC = 5x + 2, and AC = 56, then find the value for . AB, BC.<br> A<br> B
inysia [295]

Answer:

AB=29; BC=27

Step-by-step explanation:

So they told us AB=4x+9 and that BC=5x+2, and AC=56 , now to help with the question you can draw this information on a number line. Now on a number you can see that basically AC=AB+BC.

So you would write it as such,,

4x+9+5x+2=56

Combine like terms

9x+11=56

Now you have to isolate the x by itself but first get rid of the 11.

9x+11-11=56-11

You would get

9x=45

Here you can divide 9 by both sides to isolate x.

9x/9=45/9

{x=5}

Now to find the value for both substitue x in the equations for both

1. AB=4x+9 where x is 5

4(5)+9 =AB

20+9 =AB

29=AB

You would do the same with BC

2. BC= 5x+2 where x is 5

5(5)+2= BC

25+2= BC

27=BC

If you want to check your answers you can just substitute x for 5 in the first equation we did where AC=AB+BC

6 0
3 years ago
Choose the expression that represents a cubic expression.
tino4ka555 [31]

The answer is C) 4x3 − 3x2 − 2x + 11

8 0
3 years ago
A store has a sale on books. The price is $17.55 for one book, $16.70 each for 2 books, $15.85 each for 3 books, and $15 each fo
3241004551 [841]
1 book is 17.55
2 books is 16.70
3 books is 15.85
4 books is 15
5 books is 4.15
6 books is 4.30
7 books is (3.55)
8 0
3 years ago
Read 2 more answers
can anyone help me with this ??
Mars2501 [29]

Answer:

A. 336

B. Arranging 3 people in 8 chairs.

C. 42

B. Arranging 2 people in 7 chairs.

Step-by-step explanation:

A.

P(n, r) = P(8, 3)

Formula for Permutation is given as:

P(n, r) = \dfrac{n!}{(n-r)!}

Putting the value of n = 8 and r =3 , we get:

P(8, 3) = \dfrac{8!}{(8-3)!} \\\Rightarrow \dfrac{8\times 7 \times 6 \times 5\times 4 \times 3 \times 2\times 1}{5\times 4 \times 3\times 2\times 1}\\\Rightarrow 8\times 7 \times 6 \\\Rightarrow 336

B. Real world situation for part A:

Arranging 3 people on 8 chairs.

First person has 8 options.

Second person has 7 options.

Third person has 6 options.

C.

P(n, r) = P(7, 2)

Formula for Permutation is given as:

P(n, r) = \dfrac{n!}{(n-r)!}

Putting the value of n = 7 and r = 2 , we get:

P(7, 2) = \dfrac{7!}{(7-2)!} \\\Rightarrow \dfrac{7 \times 6 \times 5\times 4 \times 3 \times 2\times 1}{5\times 4 \times 3\times 2\times 1}\\\Rightarrow 7 \times 6 \\\Rightarrow 42

D.  Real world situation for part AC:

Arranging 2 people on 7 chairs.

First person has 7 options.

Second person has 6 options.

4 0
3 years ago
Other questions:
  • Solve the compound inequality 7x &gt; –35 and 3x ≤ 30.
    15·2 answers
  • The measure of an exterior angle of a regular polygon is 15 degrees. What is the sum of the measures of the interior angles of t
    15·2 answers
  • If 6 more than the product of a number and - 2 is greater than 10, which of the following could be that number?
    15·1 answer
  • I need to know how to solve the equation 2/3x+1= -1/3x-1
    15·1 answer
  • 3x+8-X=57-4<br> Is 7 a solution to the question
    15·2 answers
  • PLZ HELP ASAP 20 POINTS WILL MARK BRAINLIEST THANK YOU
    11·2 answers
  • Can you plz help me with the following questions
    8·1 answer
  • (2x + 3) + (4x + 5)<br> please help im really confused
    15·1 answer
  • Grade 7th math anybody know the answer
    8·1 answer
  • What is the area, in square units, of a trapezoid bounded by the lines $y = x$, $y = 10$, $y = 5$ and the $y$-axis? express your
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!