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mixer [17]
3 years ago
13

Need help on the yellow question

Mathematics
2 answers:
hodyreva [135]3 years ago
8 0
8/21 is the answer to the question
Viktor [21]3 years ago
8 0

Answer:

8/21

Step-by-step explanation:

Use the method called KCF, or Keep, Change and Flip for this question.

For this question, keep the first fraction of the equation the same, but flip the 2nd fraction of the denominator and the numerator. For example, you need to change it from 3/4 to 4/3.

So it's 2/7 x 4/3 = 8/21

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Which of the following rational numbers is equal to 2 point 8 with bar over 8 ? twenty two over nine, twenty four over nine, twe
alina1380 [7]
Just to remove ambiguities, the bar over the expression means it's repeating itself to infinity.

\bf 2.888\overline{8}\impliedby \textit{now say, let's make }x=2.888\overline{8}
\\\\\\
\textit{and multiply it by 10, to move over the 8 to the left}
\\\\\\
\begin{array}{llll}
10x&=&10\cdot 2.888\overline{8}\\
&&28.88\overline{8}\\
&&26+2.888\overline{8}\\
&&26+x
\end{array}\implies 10x=26+x
\\\\\\
9x=26\implies x=\cfrac{26}{9}

notice, the idea being, you multiply it by 10 at some power, so that you move the "recurring decimal" to the other side of the point, and then split it with a digit and "x".

now, you can plug that in your calculator, to check what you get.
4 0
3 years ago
Read 2 more answers
Put together, Tom and his father away 280 pounds. Tom’s dad weighs three times as much as he does. How much does Tom weigh?
vovangra [49]

Answer:

Tom weighs 70 pounds

Step-by-step explanation:

first, you have to set up your equation which would be, x + 3x = 280.

The x stands for Tom's weight and the 3x stands for three times Tom's weight for the dad. You would then add your like terms, then divide by 4 to get 70.

x + 3x = 280

4x = 280

280/4 = 70

x = 70

Hope this helps!

3 0
3 years ago
PLEASE HURRY! ^^
GarryVolchara [31]
Answer: 3 and -3

Your welcome
6 0
2 years ago
Read 2 more answers
What is the difference between the areas of a circular table with diameter 6 ft and a circular table with diameter 8 ft? Round y
MrMuchimi

If the diameter is given in a problem, area is computed as

A = (π/4) × D<span>2   where </span><span>π is equal to 3.14</span>

<span>If D (diameter)  of one circular table is 6 ft its  Area is 28 sq ft.</span>

If D of another circular is 8 ft its Area is 50 sq ft.

<span>The difference between the areas of the two tables is, therefore (50-28) or 22 sq. ft.</span>

3 0
3 years ago
Factor to find the zeros of the function defined by the quadratic expression.
wel
Hi there! The answer is A) x = 3 or x = 6

2 {x}^{2}  - 18x + 36 = 0
Divide by 2.

{x}^{2}  - 9x + 18 = 0
Factor.

(x - 3)(x - 6) = 0
Use the rule AB = 0 gives A = 0 or B = 0

x - 3 = 0 \:  \: or \:  \: x - 6 = 0 \\ x = 3 \:  \:   \:  \:  \:  \:  \:  \:  \: or \:  \: x = 6

The answer is A) x = 3 or x = 6

4 0
3 years ago
Read 2 more answers
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