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Dafna11 [192]
3 years ago
8

Please solve it CORRECTLY step by step asap​

Mathematics
1 answer:
Lorico [155]3 years ago
6 0

Answer:

Product = \frac{3}{5}ab

Step-by-step explanation:

Given

-\frac{3}{7}a

-\frac{21}{15}b

Required

The product

The product is:

Product = -\frac{3}{7}a * -\frac{21}{15}b'

Cancel out the negative signs

Product = \frac{3}{7}a * \frac{21}{15}b

Simplify fractions

Product = \frac{1}{7}a * \frac{21}{5}b

Product = \frac{1}{1}a * \frac{3}{5}b

Product = \frac{3}{5}ab

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Which of the following equations have exactly one solution?
Ilia_Sergeevich [38]

For choice A, we can rearrange the equation to 38x=0, so it has exactly one solution, x=0.

For choice B, we rearrange the equation to 38x=36, so this too has exactly one solution, x=\frac{36}{38}=\frac{18}{19}.

Rearranging the equation in choice C by eliminating the x terms gives us the false equality -18=18, so this equation has no solutions.

Eliminating x in the equation in choice D gives the equality 18=18, which is always true, so this equation has infinitely many solutions.

Thus, we conclude that choices A and B work.

3 0
3 years ago
Read 2 more answers
What is the value of x?​
Studentka2010 [4]

The top smaller sub-triangle and the whole big triangle are similar. This means that the correspondant sides are in proportion. So, we have

6\div 5 = 54\div 3x+12

Which implies

6(3x+12)=5\cdot 54 \iff 3x+12=\dfrac{5\cdot 54}{6}=45

So, we have

3x+12 = 45 \iff 3x = 33 \iff x=11

6 0
3 years ago
How to solve this?<br> Help me please
Korvikt [17]

The answer is C. 650

<em>Have a nice day :)</em>

<em>-</em><em>Kearsi</em>

5 0
3 years ago
Solve the following equation simultaneously 1/x-5/y=7, 2/x+1/y=3​
maria [59]

Answer:

  (x, y) = (1/2, -1)

Step-by-step explanation:

Subtracting twice the first equation from the second gives ...

  (2/x +1/y) -2(1/x -5/y) = (3) -2(7)

  11/y = -11 . . . . simplify

  y = -1 . . . . . . . multiply by y/-11

Using the second equation, we can find x:

  2/x +1/-1 = 3

  2/x = 4 . . . . . . . add 1

  x = 1/2 . . . . . . . multiply by x/4

The solution is (x, y) = (1/2, -1).

_____

<em>Additional comment</em>

If you clear fractions by multiplying each equation by xy, the problem becomes one of solving simultaneous 2nd-degree equations. It is much easier to consider this a system of linear equations, where the variable is 1/x or 1/y. Solving for the values of those gives you the values of x and y.

A graph of the original equations gives you an extraneous solution of (x, y) = (0, 0) along with the real solution (x, y) = (0.5, -1).

6 0
2 years ago
Express… As a limit of a right Reimann sum
elixir [45]

Answer:

Step-by-step explanation:

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