Step-by-step explanation:
let, the ratio of boys and girls be 6x:5x
total student=550
now,
- 6x+5x=550
- 11x=550
- x=550/11
- x=50
<h3>number of girls who attended the assembly are 5x=5×50=2</h3><h2 /><h2>hope it helps.</h2>
The answer is 167 because 44 times 4 is 176 and 176 - 9 is 167.
You always do the estimating first. That way, you'll know
if your answer makes sense. If not, you know right away that
you made a mistake in adding.
When I look at these numbers, I make the first one about 365 thousand
and the second one about 6 thousand.
I add those in my head, and I estimate that the sum is going to be
about 371 thousand.
Now I pick up my pencil and add the numbers. I get 358,643 .
This is not good. Something went wrong. That's nowhere near my estimate.
I must have made a mistake. I'll have to try again.
This time I put the numbers into my calculator and add them.
I get 371,109 . This is very near my estimate, so I accept it.
I look back at my work on paper, to see if I can spot my mistake there.
Yep ... there it is. On paper, I subtracted the numbers instead of adding.
The estimate ... which I did FIRST ... told me when my answer was
wrong, and when it was right.
If you mean 2x=40 x=20
but if you mean x^2=40 i think its x=80
to find the area you have to do:
Area = π( D/2)^2 and in this case D = 19 so..
π(19/2)^2
=90.25π
=283.52873698648
Answer: 283.53