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Tema [17]
2 years ago
14

Look at each problem. Then decide if it is an equation or an expression. Check all the equations. A number decreased by three is

seven. 9 + n the product of a number and eleven The quotient of a number and six is two. x – 5 = 21
Mathematics
2 answers:
DerKrebs [107]2 years ago
9 0

Answer:

ADE

Step-by-step explanation:

inysia [295]2 years ago
5 0

Answer:

Equations:

  • A number decreased by three is seven.
  • The quotient of a number and six is two.
  • x – 5 = 21

Expressions:

  • 9 + n
  • The product of a number and eleven

Step-by-step explanation:

Required

Determine which is an expression and which is an equation

To start with, we analyse each of the options one after the other

<em></em>

(a): A number decreased by three is seven.

Let the number be n

<em></em>

<em>So, when n is increased by 3, the result  is 7. </em>

This statement can be represented as:

<em></em>n + 3 = 7<em></em>

<em></em>

<em>The above is an equation because it has an = sign</em>

(b) 9 + n

This is not an equation <em>because it has no = sign.</em>

<em>Hence, it is an expression.</em>

(c) The product of a number and eleven

Let the number be n

<em></em>

<em>n multiplied by 11 is represented as:</em>

<em></em>n * 11<em></em>

<em></em>

This is not an equation <em>because it has no = sign.</em>

<em>Hence, it is an expression.</em>

(d) The quotient of a number and six is two.

Let the number be n

<em></em>

<em>So, the quotient of n and 6, is 2. </em>

This statement can be represented as:

\frac{n}{6} = 2

<em></em>

<em>The above is an equation because it has an = sign</em>

(e) x – 5 = 21

<em>The above is an equation because it has an = sign</em>

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Factorize:<br>3a^2 + 10a + 3​
sergey [27]

Answer: (3a + 1) (a + 3)

Step-by-step explanation:

<u>Concept:</u>

Here, we need to know the idea of factorization.

It is like "splitting" an expression into a multiplication of simpler expressions. Factoring is also the opposite of Expanding.

<u>Solve:</u>

Given = 3a² + 10a + 3

<em>STEP ONE: separate 3a² into two terms</em>

3a

a

<em>STEP TWO: separate 3 into two terms</em>

3

1

<em>STEP THREE: match the four terms in ways that when doing cross-multiplication, the result will give us 10a.</em>

3a     1

a       3

When cross multiply, 3a × 3 + 1 × a = 10a

<em>STEP FOUR: combine the expression horizontally to get the final factorized expression.</em>

3a  ⇒   1

a   ⇒    3

(3a + 1) (a + 3)

Hope this helps!! :)

Please let me know if you have any questions

7 0
3 years ago
In large cities people out and take taxis to get from one place to another the cost is $25.20 every 36 miles how much is a 47 mi
Kay [80]

47 miles taxi ride will cost $32.9

Step-by-step explanation:

Given,

Cost every 36 miles = $25.20

Cost of one mile = \frac{Cost\ for\ 36\ miles}{36}

Cost of one mile = \frac{25.20}{36}\\

Cost of one mile = $0.7

Cost of 47 miles = Cost of one mile * 47

Cost\ of\ 47\ miles = 0.7*47\\Cost\ of\ 47\ miles = \$32.9

47 miles taxi ride will cost $32.9

Keywords: Division, multiplication

Learn more about multiplication at:

  • brainly.com/question/10879401
  • brainly.com/question/10940255

#LearnwithBrainly

5 0
3 years ago
It costs $38 for 2 people to go to the movie theater. 40% of the money was for snacks.What was the cost of each movie ticket?
stira [4]

Answer:

11.4

Step-by-step explanation:

40% of 38 is 15.2, 38-15.2=22.8. 22.8/2=11.4 (since there's two people)

4 0
3 years ago
Henry had 5 grapes. He mutiplys the five by 80, just because he was courious. How much did he get?
lina2011 [118]
<h2>B)</h2>

It is <em><u>400</u></em>. Since 5 x 8 = 40 add the 0 to the end its 400!!

Hope this helps <33!!

8 0
2 years ago
Read 2 more answers
The number of chairs increased by 7 <br><br> A.cx7<br> B.c+7<br> C.c/7<br> D.c-7
miss Akunina [59]
B.c+7
hope that helps!
7 0
3 years ago
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