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IrinaK [193]
3 years ago
9

What is the value of x in the proportion below? 57=x21

Mathematics
2 answers:
Rama09 [41]3 years ago
8 0

Answer:

2.71428571429

Step-by-step explanation:

calculator, counted it myself too to check if it's right

2.71428571429

PLEASE VOTE 5.0 MARK ME BRAINLIEST AND THANK ME

Yuri [45]3 years ago
5 0

Answer:

x=\frac{19}{7}

Step-by-step explanation:

57=x×21

57=21x

21x=57

x=\frac{19}{7}

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What is 0.66666666666 as a fraction
stellarik [79]

To turn 0.(6)=0.6666... into a fraction you should do such steps:

1 step. Set up an equation by representing the repeating decimal with a variable. Using your example, you will let x represent the repeating decimal 0.(6), so you have x=0.666... .

2 step. Identify how many digits are in the repeating pattern, or n digits. Multiply both sides of the equation from Step 1 by 10^n to create a new equation. Again, using your example, you see that the repeating pattern consists of just one digit: 6. Now multiply both sides of the equation by 10^1 = 10. Thus, you have 10x = 10 \cdot 0.666... or 10x = 6.666.....

3 step. Subtract the equation in Step 1 from the equation in Step 2. Notice that when we subtract these equations, our repeating pattern drops off. Therefore, 10x-x=6.666...-0.666...\\ 9x=6.

4 step. You now have an equation that you can solve for x and simplify as much as possible, using x as a fraction: 9x = 6. If you divide both sides by 9, you get x=\dfrac{6}{9}. When simplified, you get that x=\dfrac{2}{3}.

Answer: 0.(6)=0.666... =\dfrac{2}{3}.

8 0
3 years ago
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I NEED HELP FASTT!!! PLEASE
AysviL [449]

Answer:

5

Step-by-step explanation:

8x - 6 > 12 + 2x

Subtract 2x from each

8x -2x -6 > 12+2x-2x

6x -6 > 12

Add 6 to each side

6x -6+6 > 12+6

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Divide by 6

6x/6 > 18/6

x > 3

The only value greater than 3 is 5

4 0
2 years ago
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Identify the polygon that has vertices A(−10,−1), P(−7,3), E(−3,0), and X(−6,−4), and then find the perimeter and area of the po
Bogdan [553]

Answer:

  square; perimeter 20 units; area 25 square units.

Step-by-step explanation:

As the attachment shows, each side of the polygon is the hypotenuse of a 3-4-5 right triangle, so has length 5 units. The perimeter is the sum of those lengths, 4×5 = 20; the area is the product of the lengths of adjacent sides, 5×5 = 25.

The figure is a square of side length 5 units.

The perimeter is 20 units; the area is 25 square units.

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2 years ago
What will the last payment be to pay off a $1,250 computer plus 8% sales tax with monthly payments of $120?
Natasha_Volkova [10]
1250x.08= 100+1250= 1350 / 120 is 11.25 so 11 months of paying $120 leaves a $30 12th month payment.
7 0
2 years ago
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What is the probability of rolling a 4 on a single sided die and then rolling a 6?
Rzqust [24]

Answer:

If it is a six-sided die then it has the probability of 1/6 or .16

Step-by-step explanation:

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