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Write 0.185 as a percentage

Times by 100 0.185 X 100= 18.5%
EP
Answered by Emily P. • Maths tutor
4769 Views

Show that 3/10 + 2/15= 13/30

First make the denominator the same 3/10 X3 2/15 X2 =9/30 + 4/30 =13/30
EP
Answered by Emily P. • Maths tutor
7848 Views

Expand and simplify 3(m + 4) – 2(4m + 1)

Multiply through the 3 of the first bracket to get 3m +12. Then multiply out the second bracket by -2 to get -8m -2. Write it out in a line: 3m + 12 - 8m -2 Simplify: -5m +10 Divide by -5 again to simplify f...
TD
Answered by Tutor49422 D. • Maths tutor
15268 Views

A bag contains 5 blue marbles and 5 red marbles. If marbles are NOT replaced after being selected from the bag, what is the probability (in percentage) of picking 2 red marbles? Give your answer to one decimal place.

As there are a total of 10 marbles in the bag, then the probability of picking a red marble is 5/10. When the next marble is selected, there are only 9 marbles left in the bag since the red marble has not be...
PB
Answered by Peter B. • Maths tutor
10277 Views

Differentiate y=(x^2+1)(e^-x)

Here, we're using the product rule (and the chain rule for the e -x ): y=(x 2 +1)(e -x ) dy/dx=(2x)(e -x )+(x 2 +1)(-1)(e -x ) Then we simplify to get: dy/dx=(e -x )(2x-x 2 -1)
RD
Answered by Rishav D. • Maths tutor
7571 Views