Answer: f & b
Step-by-step explanation:
for example both leave the digits unchanged and an identity is an element of a set which, if combined with another element by a specified binary operation, leaves that element unchanged.
<h3>
Answer: Choice A) 3/40</h3>
Check out the diagram below. I have labeled the marbles 1 through 20 to help count out them easily.
We have 3 blue marbles out of 20 total. The probability of selecting blue is 3/20.
If we put the first selection back, then we will still have 20 marbles overall. The are 10 green marbles out of 20 so the probability of getting green is 10/20 = 1/2
Multiply the probabilities 3/20 and 1/2 to get (3/20)*(1/2) = (3*1)/(20*2) = 3/40
Answer:
eli= £180, freda = £260, geoff = £360
Step-by-step explanation:
eli : freda : geoff
9 : 13 : 18
9 + 13 + 18 = 40 parts
800 / 40 = 20
therefore 1 part = £20
20 x 9 = £180
20 x 13 = £260
20 x 18 = £360
Answer:
y = x-20
Step-by-step explanation:
<h2><u>finding the equation of the line</u></h2>
get 2 points A and B , they are an on the line
make sure its in the form (x,y)
A = (0 , -20)
B = ( 70 , 50)
<h2><u>now get the gradient</u></h2>
gradient =
=
= 70/70
gradient = 1
<h2><u>now make the equation</u></h2>
m is the gradient
y- y1 = m (x-x1)
y- -20 = 1 (x - 0)
y + 20 = x
put in the form y = mx +c
therefore
<u>y = x - 20</u>
I think is 3 and 2/3 (I hope I got it right)