Answer:
222cm3
Step-by-step explanation:
9cm × 3cm × 6cm = 162cm
8cm - 3cm = 5cm
5cm × 2cm × 6cm = 60cm3
162cm3 + 60cm3 = 222cm3
Volume = 222cm3
Answer:
7. 4
8. 7
Step-by-step explanation:
7. 
Cross multiply
(division property of equality)
8. 
Cross multiply
(addition property of equality)
Divide both sides by 6
Answer:
y = 4x / x = 1/4 y
Step-by-step explanation:
chairs = x ( to find out how many chairs there are you have to take the legs and divide them by 4 )
Legs = y ( to find out how many legs there are you must multiply the amount of chairs by 4 )
Answer: Choice D
(a-e)/f
=======================================
Explanation:
Points D and B are at locations (e,f) and (a,0) respectively.
Find the slope of line DB to get
m = (y2-y1)/(x2-x1)
m = (0-f)/(a-e)
m = -f/(a-e)
This is the slope of line DB. We want the perpendicular slope to this line. So we'll flip the fraction to get -(a-e)/f and then flip the sign from negative to positive. That leads to the final answer (a-e)/f.
Another example would be an original slope of -2/5 has a perpendicular slope of 5/2. Notice how the two slopes -2/5 and 5/2 multiply to -1. This is true of any pair of perpendicular lines where neither line is vertical.
