Which of the following is a proportion? 9/12=8/10 3/4=9/12 6/8=8/12 12/18=9/16

Mathematics

2 answers:

Keith_Richards [23]3 years ago

8 0

The second option, 3/4 = 9/12 is a proportion.

Hope this helped! :D

Helen [10]3 years ago

8 0

Answer:

Step-by-step explanation:

To find the correct proportion you simplify all fractions into their simpliest form. If you do this you'll find that only B has two equivalent fractions

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What value of b will cause the system to have an infinite

kvasek [131]

Hi there!

The way that an infinite number of solutions is achieved is when the two equations, when solved together, get an answer which is just a number equal to the same number. To do this, first substitute 6x-b in for y in the second equation.

$-3x+\frac{1}{2}(6x-b)=-3$

$-3x+3x-\frac{1}{2}b=-3$

$-\frac{1}{2}b=-3$

Now, we see that b needs to be equal to -3 when multiplied by -1/2. When both sides are divided by -1/2, b becomes equal to 6. Thus, b must be 6.

Check work:

$6x-6=y$

$-3x+\frac{1}{2}(6x-6)=-3$

$-3x+3x-3=-3$

$-3=-3$

Thus, as they are equal to each other, the answer is correct. b = 6.

Hope this helps!

8 0

3 years ago

Solve for k 5/8(3k+1)-1/4(7k+2)=1

lesya [120]

Answer:

Step-by-step explanation:

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