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Oduvanchick [21]
3 years ago
9

Hey! I am stuck on this, it's for class. I've been struggling with this for quite some time. So, if you have the chance. Click t

he picture and tell me if it's true or false using that table thingy. Now, you don't need do explain if you don't want to. But, I just need the answer, and yeah. Just tell me if it's true or false. Thanks!! :-)

Mathematics
2 answers:
White raven [17]3 years ago
8 0
True false false 

your WELCOME;)
grin007 [14]3 years ago
4 0
1. False
2. True
3. True
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Reverse the two digits of my age, divide by three, add 20, and the result is my age. How many years old am I
lapo4ka [179]

Answer:

  • 48 years old.

Step-by-step explanation:

Let the age be xy or 10x + y.

Reverse the two digits of my age, divide by three, add 20, and the result is my age, convert this to equation:

  • (10y + x)/3 + 20 = 10x + y
  • (10y + x)/3 = 10x + y - 20
  • 10y + x = 3(10x + y - 20)
  • 10y + x = 30x + 3y - 60
  • 30x - x + 3y - 10y = 60
  • 29x - 7y = 60

We should consider both x and y are between 1 and 9 since both the age and its reverse are 2-digit numbers.

Possible options for x are:

  • 29x ≥ 7*1 + 60 = 67 ⇒ x > 2, at minimum value of y,

and

  • 29x ≤ 7*9 + 60 = 123 ⇒ x < 5, at maximum value of y.

So x can be 3 or 4.

<h3>If x = 3</h3>

  • 29*3 - 7y = 60
  • 87 - 7y = 60
  • 7y = 27
  • y = 27/7, discarded as fraction.

<h3>If x = 4</h3>

  • 29*4 - 7y = 60
  • 116 - 7y = 60
  • 7y = 56
  • y = 8

So the age is 48.

6 0
1 year ago
What is the opposite of dividing by 1? O A. subtracting 1 B. multiplying by 1 C. adding 1 D. dividing by 1​
topjm [15]

Answer:

B multiplying by

Step-by-step explanation:

Multiple is opposite from divide.

Plus is opposite from subtract.

6 0
3 years ago
Describe three different substitutuion method
ankoles [38]

elimanation  variations matrix

7 0
2 years ago
3/4 or 10/17 what is bigger?
Pepsi [2]
Hello! First, let's find a common denominator.

Let's use 68.

3/4 is 51/68 and 10/17 is 40/68; therefore, 3/4 is greater! I hope this helped! :)
6 0
2 years ago
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Alex runs up a staircase with n steps, and can hop either 1, 2, or 3 steps at a time. Count how many possible ways the child can
MArishka [77]

Answer:

There are 4 possible ways

Step-by-step explanation:

Data provided in the question:

Alex can hop in 1 steps, 2 steps, or 3 steps at a time.

From the above data it can be concluded that at a single maximum 3 steps can be run at a time

thus,

for running 3 steps at a time from the above data, we can have

with 1 step only : {1 , 1 , 1}

with 1 step first and 2 steps : {1 , 2}

with 2 steps first and then the 1 step: {2 , 1}

and 3 steps at once : {3}

thus, we have 4 possible ways to run up the stairs keeping the above condition.

8 0
3 years ago
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