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Aloiza [94]
3 years ago
13

6. A number consists of two digits whose

Mathematics
1 answer:
nignag [31]3 years ago
6 0
  • Answer:

<em>(c) 53</em>

  • Step-by-step explanation:

<em>Hi there !</em>

<em>we have a number ab</em>

<em>a + b = 8</em>

<em>ab - 18 = ba</em>

<em>10a + b - 18 = 10b + a</em>

<em>10a - a + b - 10b = 18</em>

<em>9a - 9b = 18 | + (9a + 9b)</em>

<em>9a + 9a - 9b + 9b = 18 + 9(a + b)</em>

<em>18a = 18 + 9×8</em>

<em>18a = 18 + 72</em>

<em>18a = 90</em>

<em>a = 90 : 18</em>

<em>a = 5</em>

<em>a + b = 8</em>

<em>5 + b = 8</em>

<em>b = 8 - 5</em>

<em>b = 3</em>

<em>ab = 53</em>

<em>Good luck !</em>

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Answer:

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Step-by-step explanation:


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3 years ago
!!!Please help will give the brainliest, and please do not put in a silly answer because you want some points or I will report y
Amanda [17]

Answer:

In short, they are all quadrilaterals.

Step-by-step explanation:

<u>Rectangle:</u>

- Every angle equals 90 degrees

- Opposite sides are equal and parallel

<u>Square:</u>

- Every angle equals 90 degrees

- Opposite sides are equal and parallel

- Diagonals within the square are perpendicular

<u>Parallelogram:</u>

- Opposite sides are equal and parallel

- Opposite angles are equal

- Any two angles next to each other have to equal 180 degrees, since it would be a line

<u>Rhombus:</u>

- Opposite angles are equal

- All sides are equal

- Opposite sides are parallel

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<u>Trapedzoid:</u>

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Really hope this helped you!

7 0
3 years ago
Simplify 3xy + x 2 - 4xy + 2xupper2y​
densk [106]
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6 0
3 years ago
What is the justification for each step in the solution of the equation?<br><br> 4(4x+6)−7=77−4x
zepelin [54]

Answer:

20x + 17 = 77    --> Addition Property of Equality:

You are adding (Addition Property) 4x to both sides of the equal sign (Equality).

20x = 60           --> Subtraction Property of Equality:

You subtracted (Subtraction Property) 17 from both sides of the equal sign (Equality).

x = 3                  --> Division Property of Equality:

You divided (Division Property) 20 from both sides of the equal sign (Equality) to completely isolate the variable x.

~

6 0
3 years ago
5. One canned juice drink is 15% orange juice; another is 10% orange juice. How many liters of each should be mixed together in
hram777 [196]
X: liters of 15% orange juice
y: liters of 10% orange juice

x+y=5L

y=5L - x

x liters of 15% orange juice plus y liters of 10% orange juice makes 5 liters of 12% orange juice in equation form:

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0.15x+0.10(5L-x)=0.12(5L)

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x=2L

so y = 3L

so you need 2 liters of 15% orange juice and 3 liters of 10% orange juice
4 0
3 years ago
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