For this, we use the FOIL method of expanding brackets; start by multiplying the FIRST terms of each bracket together to get xx=x^2. Next multiply the OUTSIDE elements, ie the first element in the first bracket and the last in the second, giving x(-5)=-5x. Then comes the INSIDE elements, giving 4x=4x, and finaly the LAST elements of each bracket, giving 4(-5)=-20. Adding all these terms together gives us our answer; x^2+4x-5x-20, which can be simplified to x^2-x-20.
Hope this helps!
Answer:
Number 3 and 2
Step-by-step explanation:
you can use desmos to check ur answers
Step-by-step explanation:
when multiplied together, the gradients of the 2 graphs should equal -1 (of they are perpendicular).
x-7y=4
-7y= -x + 4
y= -1/7 x + 4/7
21x+ 3y=11
3y=-21x+11
y=-21/3 x + 11/3
-21/3 * -1/7 = 1
when multipled together, the 2 gradients dont equal -1 therefore they are not perpendicular
unless I've made a mistake with the signs at some point haha
Distance:time=25:13.7
ratio and propriton
4min=60sec*4=240sec
25/13.7=?/240
times both sides by 240*13.7
25*240=13.7?
6000=13.7?
divide both sides by 13.7
437.9562=?
about 438 meters
We can represent each company's graph by the following equations
V = (0.04)*H...............(Company P)
V = (0.06)*H...............(Company S)
(V represents the vacation hours and H the hours worked)
If both work 2080 hours
V1 = (0.04)*(2080) = 83.2 vacation hours..............(Company P)
V2 = (0.06)*(2080) = 124.8 vacation hours ..............(Company S)
124.8 - 83.2 = 41.6 hours
The friend at company S will have about 42 more vacation hours that the friend at company P
