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
bezimeni [28]
2 years ago
8

Add the two expressions. 3x + 7 and 9x−2

Mathematics
2 answers:
dexar [7]2 years ago
4 0

Answer:

  • 12x + 5

Step-by-step Solution:

  • (3x + 7) + (9x − 2)

[Opening the brackets]

  • => 3x + 7 + 9x - 2

[Combining Like terms]

  • => (3x + 9x) + (7 - 2)

[Simplifying]

  • => 12x + 5

aleksklad [387]2 years ago
3 0

Let's add

\\ \tt\hookrightarrow 3x+7+(9x-2)

  • Remove brackets

\\ \tt\hookrightarrow 3x+7+9x-2

Combine like variables

\\ \tt\hookrightarrow 3x+9x+7-2

\\ \tt\hookrightarrow 12x+5

You might be interested in
Amanda uses a rectangular canvas for a panting. The length is 6x-3 centimeters The width is 2x+6 centimeters,and is 4/5of the le
julia-pushkina [17]

Answer:

15 cm by 12 cm.

Step-by-step explanation:

Given:

Amanda uses a rectangular canvas for a panting.

The length is 6x-3 centimeters.

The width is  2x+6 centimeters, and is 4/5 of the length .

Question asked:

.What are the dimensions of the canvas ?

Solution:

<u>As given that the width is </u>\frac{4}{5} of the length.

2x+6=\frac{4}{5} (6x-3)\\ \\ 2x+6=\frac{4}{5}\times6x-\frac{4}{5}\times3\\ \\ 2x+6=\frac{24x}{5} -\frac{12}{5} \\ \\

Adding both sides by \frac{12}{5}

2x+6+\frac{12}{5} =\frac{24x}{5} -\frac{12}{5}+\frac{12}{5}\\ \\ 2x+\frac{42}{5} =\frac{24x}{5}

Subtracting both sides by 2x

2x-2x+\frac{42}{5} =\frac{24x}{5} -2x\\ \\ \frac{42}{5} =\frac{24x-10x}{5} \\ \\ \frac{42}{5} =\frac{14x}{5} \\ \\

By cross multiplication:-

5\times14x=5\times42\\ \\ 70x=210\\ \\

By diving both sides by 70

x=3

<u>Now, substituting the value:-</u>

The length = 6x-3 cm

                  = 6\times3-3=18-3=15\ cm

The width = 2x+6 cm

                 = 2\times3+6=6+6=12\ cm

Thus, length and width of canvas are 15 cm and 12 cm.

7 0
3 years ago
Please help the question is in the picture
Oduvanchick [21]

Answer: C

Step-by-step explanation:

You need to substitute x for 2.5. After that, multiply 101 and 2.5 to get 252.5. Then, add 252.5 and 207.85 to get 460.35.

7 0
3 years ago
Multiple choice please answer please
eduard

Answer: 33.85 mm

Step-by-step explanation:

Use trigonometry, tan equation

You are give the tan angle and adjacent side, you need to find the opposite side so

O

T A

Tan(72)= x/11

x= tan(72) x 11

x= 33.85

8 0
3 years ago
Read 2 more answers
(2+x)(2−x)?? helppppppp
shusha [124]
You can find one the picture I send




3 0
3 years ago
Read 2 more answers
R/7.1 = 4.2<br><br>what is r =​
MissTica

Answer:

r =29.82

Step-by-step explanation:

r/7.1 = 4.2

Multiply each side by 7.1

r/7.1 *7.1 = 4.2*7.1

r =29.82

8 0
2 years ago
Other questions:
  • What two numbers multiply together to equal -32 and add together to equal positive four
    5·2 answers
  • Can someone please answer this question please answer it correctly and please show work please help me please help
    9·1 answer
  • Sandy has several pictures of to hold lemonade for the school bake sale two pictures can hold 64 ounces each and four pictures c
    12·1 answer
  • Solve the absolute value equation,if possible. If there is no solution, explain. I 5x + 10 I = -7
    9·1 answer
  • Jalapeno Plan: $3 admission plus $0.95 per bowl.
    12·1 answer
  • What is the missing length?
    10·1 answer
  • Solve the following quadratic equation.
    10·1 answer
  • The box must hold 15 total soda cans. The box must hold 15 total soda cans. Sara wants to make the box as small as possible in o
    13·1 answer
  • Given the sequence <img src="https://tex.z-dn.net/?f=c_n" id="TexFormula1" title="c_n" alt="c_n" align="absmiddle" class="latex-
    10·2 answers
  • The domain of the piecewise function is (-infinity,infinity).
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!