Answer:
Step-by-step explanation:
3:5
9514 1404 393
Answer:
27 cm³
Step-by-step explanation:
The surface area of a cube is ...
SA = 6s²
Then the edge length is ...
54 cm² = 6s² . . . . . please note that cm³ is not the appropriate unit for area
9 cm² = s² . . . . . .divide by 6
3 cm = s . . . . . . . take the square root
The volume of a cube is ...
V = s³
V = (3 cm)³ = 27 cm³
The volume of the cube is 27 cm³.
Answer:
$7 for the first question
$6.50 for the last one
Answer:
standard form
Step-by-step explanation:
The equation of a line in standard form is
Ax + By = C ( A is a positive integer and B, C are integers )
Answer:
$3
Step-by-step explanation:
Let the cost of a book and a pen be $b and $p respectively.
3b +2p= 8 -----(1)
5b +3p= 13 -----(2)
(1) ×3:
9b +6p= 24 -----(3)
(2) ×2:
10b +6p= 26 -----(4)
(4) -(3):
10b +6p -(9b +6p)= 26 -24
Expand:
10b +6p -9b -6p= 2
b= 2
Substitute b= 2 into (1):
3(2) +2p=8
6 +2p= 8
2p= 8 -6
2p= 2
p= 2 ÷2
p= 1
Total cost of one book and one pen
= $b +$p
= $2 +$1
= $3
