Answer:
the unit of the rate is 3.5cm since, the rate is 8,28. The two point lies on 3.5
So he bought 12 CDs and DVDs (in total), CDs + DVDs = 12
Each cd is 2 and each cd is 3
Total spent = 31 (2*x + 3*y)
I call x cds and y dvds
x+y = 12
2x+3y = 31
Solve for y
Move x to the right with changed sign
y = 12-x (DVDs, you can also write x = 12-y)
And substitute 12-y in the equation
2x + 3(12-x) = 31
2x + 36 - 3x = 31
2x - 3x = 31 - 36
-x = -5
x = 5 (CDs)
To find DVDs let's rewrite y = 12-x
y = 12-5 = 7 (DVDs)
Answer:
16.0"
Step-by-step explanation:
ASSUME the pyramid is a square right pyramid.
height = 15"
base side length = 11"
(Following edited/corrected thanks to cwrw238)
Slant height
= sqrt(5.5²+15²) using Pythagoras theorem
= sqrt(255.25)
= 15.98"
Answer:
Oh this is easy 21'-sid93dnsimepl-02
Step-by-step explanation: