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torisob [31]
3 years ago
7

32 Over 8 = 28 Over x a. x = 4 c. x = 8 b. x = 28 d. x = 7

Mathematics
1 answer:
iren [92.7K]3 years ago
7 0

Answer:

d. x = 7

Step-by-step explanation:

32/8 = 28/x

simplify the fraction

4/1 = 28/x

cross multiply:

4x = 28

divide both sides by 4:

x = 7

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If y varies inversely with x and y=2 when x=5, what is the value of x when y=3?
Nostrana [21]

Answer:

Step-by-step explanation:

Method

Inversely in this sentence means

y = k/x    

So you first step is to find the value of k. You do that by setting up an inverse relationship with y = 2 , x = 5

2 = k/5                     Multiply both sides by 5

2*5 = 5*k/5

10 = k

Now you are able to answer the question.

  • k = 10
  • y = 3
  • x = ?

y = 10/x

3= 10/x                      Multiply both sides by x

3*x = x * 10/x

3x = 10                      Divide both sides by 3

3x/3 = 10/3

x = 3.33 or x = 3 1/3

Answer

x = 3.33 or x = 3  1/3

8 0
2 years ago
С<br> What is the solution to the equation 3x ÷ (-6) = -12?
Nat2105 [25]

Answer:

x=24

Step-by-step explanation:

First: Multiply -6 to both sides

Next: You get 3x=72

Then: Divide 72 by 3

Last:....

ANSWER: x=24

7 0
3 years ago
Read 2 more answers
Simplify the following and write your answer in simplest form
viktelen [127]
In simplest form it is 25 over 9
5 0
2 years ago
Consider the following pair of equations:
Bond [772]
So the equations are: 

y= 3x + 3

y= x- 1

By the transitive property, we know x-1= 3x+3 (Transitive property means if a= b, and b= c, shouldn't a = c if they both equal b?)

so, x- 1= 3x + 3.  Now we isolate x and solve:
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x= 3x+ 4
-x  -x

0 = 2x+ 4
-4        -4

-4 = 2x
/2    /2

x= -2

Now, you can plug that back in to find y:

y = x- 1
y= -2 -1
y= -3

Then plug them both in to make sure it is correct. :o)
6 0
2 years ago
Number 76? Someone plz help!
mariarad [96]
The answer is D, 

34% * 6.66 = <span>2.2644

6.66 - </span>2.2644 = <span>4.3956 </span>≈<span> 4.40</span>
6 0
3 years ago
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