Evaluate the expression. 4×6 – 21 ÷3
2 answers:
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Answer:
See below
Step-by-step explanation:
Use the formulae directly
For a cone, with base radius = r and height = h, here are the related formula
(1)
(2)
(3)
Therefore directly plugging in the numbers in the above equations:
Note:
l = slant height in cm
SA = total surface area in sqcm
V = Volume in cubic cm
Figure(a)
r = 4, h = 8
Figure(b)
r = 7, h =15
Figure (c)
r = 5, l = 8
Answer:
11y+7y+4x+5x=360
18y+9x=360
9x=180-18y
x=
Can you solve for y now?