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Elina [12.6K]
3 years ago
13

Write an algebraic expression for the following phrase 3 more than twice a number

Mathematics
2 answers:
Digiron [165]3 years ago
8 0
X being the 'number'

2x + 3
EastWind [94]3 years ago
7 0

Answer:

2 x + 3

Step-by-step explanation:

3 more than twice a number

we have to write above equation in the form of algebraic expression

An algebraic expression is a combination of constant or variables by using suitable operators.

Let the Number be x

Twice a number i.e, we have to multiply the number by 2= 2 x

3 more i.e, we have to add 3 to above algebraic expression = 2 x+ 3

Hence, the above algebraic expression can be written as 2 x +3

Hence, the correct answer is 2 x + 3

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4. Diego is thinking of two positive numbers. He says, "If we triple the first number and
aleksandr82 [10.1K]

Answer:

3<em>x </em>+ 2<em>y</em> = 34. and two possible pairs of positive numbers are  (<em>x</em>, <em>y</em>) = (10, 2) and (<em>x</em>, <em>y</em>) = (4, 11).

Step-by-step explanation:

 Let the First positive number be <em>x</em> and second positive number be <em>y.</em>

Triple of first number = 3<em>x</em>

double of second number = 2<em>y</em>

According to question,

3<em>x </em>+ 2<em>y</em> = 34

Therefore, the equation is 3<em>x </em>+ 2<em>y</em> = 34

So the two possible pair of numbers Diego would be thinking of must satisfy the equation 3<em>x </em>+ 2<em>y</em> = 34

Now,  3<em>x </em>+ 2<em>y</em> = 34

3<em>x </em>= 34 - 2<em>y</em>

Let x = 10 and by substituting its value in above expression,

3 \times 10 = 34 - 2y

30 = 34 - 2y

2y = 34 - 30

2y = 4

y = 2

Therefore first pair (<em>x</em>, <em>y</em>) = (10, 2)

In the same way put x = 4 then,

3<em>x </em>= 34 - 2<em>y</em>

3 \times 4 = 34 - 2y

2y = 34 - 12

2y = 22

y = 11

Therefore first pair (<em>x</em>, <em>y</em>) = (4, 11)

Therefore, (<em>x</em>, <em>y</em>) = (4, 11) and  (<em>x</em>, <em>y</em>) = (10, 2) are the two possible pairs of numbers Diego could be thinking of as these both values satisfy the equation 3<em>x </em>+ 2<em>y</em> = 34.  

8 0
3 years ago
a man is six times as old as his son in 9 years he will be three times as old as his son how old are they now
GuDViN [60]
The son is 4 years old and the dad is 24 years old.
8 0
3 years ago
Read 2 more answers
The sum of the two digit number is 12. If the digit are revesed, then the new number is 18 less than the originaol muber that is
FromTheMoon [43]

Answer:

A) X + Y = 12

B) 10Y + x = 10x + Y -18

B) 9Y = 9x -18 multiplying A) by -9

A) -9Y = 9x - 72  adding A and B we get

0 = 18x -90

x = 5

The number is 75

Double-Check

7 + 5 = 12

75 -57 = 18





Step-by-step explanation:


6 0
3 years ago
The probability of getting a head is 0.3 find the probability of getting a tail
ratelena [41]

Answer: 0.7


Step-by-step explanation:

p(tail) + p(head) = 1

p(tail) = 1 - p(head)

p(tail) = 1 -0.3

p(tail) = 0.7





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6 0
3 years ago
Hey! Im counting on you guys!
raketka [301]

Answer:

  • Ken is faster by 1 mile per hour

Step-by-step explanation:

<u>Ken's speed</u>

  • 174/3 = 58 mph

<u>Brenda's speed</u>

  • 57 mph as per formula

<u>Comparing the values, we see that</u>

  • Ken is faster by 58 - 57 = 1 mile per hour
6 0
3 years ago
Read 2 more answers
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