2 years ago

6) Double a number is equal to the number decreased by five. Find the number.

Mathematics

1 answer:

Lemur [1.5K]2 years ago

4 0

Answer:

B) -5

Step-by-step explanation:

let the number be x

2x=x-5

take x to the other side

2x-x=-5

×=-5

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2 years ago

What is 3/4 of 16/21? worked out please

timofeeve [1]

Of means multiplication

So

$\frac{3}{4} \sf{of} \frac{16}{21} = \frac{3}{4} \times \frac{16}{21}$

And then simplify the numerator ad denominator

= $\frac{3 \times 16}{4 \times 21} = \frac{\ 1 \times 16}{4 \times 7}$

And simplify the numerator and denominator again

= $\frac{\ 1 \times 16}{4 \times 7} = \frac{\ 1 \times 4}{1 \times 7}$

And we are finally left with the answer which is $\frac{4}{7}$