Distributive property or
use FOIL (FOIL is just an acronym to help you remember how to multiply binomials)
distributive property
a(b+c)=ab+ac
(b+c)a=ba+ca
distribute
(-3s+2t)(4s-t)=
(-3s+2t)(4s)+(-3s+2t)(-t)=
(-3s)(4s)+(2t)(4s)+(-3s)(-t)+(2t)(-t)=
-12s^2+8st+3st-2t^2=
-12s^2-2t^2+11st
if you want foil
FOIL (just tells wich terms to multiply)
First
Outer
Inner
Last
exmaple
with
(a+b)(c+d)
First: a times c
Outer: a times d
Inner: b times c
Last: b times d
then add them
(-3s+2t)(4s-t)
First: -3s times 4s=-12s^2
Inner: 2t times 4s=8st
Outer: -3s times -t=3st
Last: 2t times -t=-2t^2
add them
-12s^2+8st+3st-2t^2=
-12s^2+11st-2t^2
same
Answer:
521
Step-by-step explanation:
The length of a midsegment (line connecting the midpoints of two sides of a triangle) is half the length of the third side.
AB = 1042 / 2
AB = 521
Answer:
0.1575
Step-by-step explanation:
Probability of picking a girl is 0.45 and probability of a girl scoring A is 0.35.
Therefore probability of a girl scoring A is 0.45*0.35=0.1575
Answer:
1/2
Step-by-step explanation:
1/2 times 1/2 equals .25 (.25 is 1/4 which is half of 1/2)
1/2 divided by 1/2 is 1( 1 is 1/2 plus 1/2)
So we can think of this as two semi circles and a rectangle. The rectangle has two exposed sides, meaning there are only two sides that should be accounted for in the overall perimeter. So for the rectangle, the exposed perimeter is 720. Because total there is a full exposed circle (2 half circles) we can find the perimeter (circumference) and add it to 720. In order to find the circumference we multiply diameter by pi. This is approximately 691.15. This added to the 729 gives us a total of 1411.15