Answer:
b : a = 1 : 4
Step-by-step explanation:
<em>
= 
</em>
<em>3 ( a + b) = 5 ( a - b)</em>
<em>3 a + 3 b = 5 a - 5 b</em>
<em>5 b + 3 b = 5 a - 3 a</em>
<em>8 b = 2 a</em>
<em>
= 
</em>
b : a = 1 : 4
The answer is -15x + 6= -9x
Answer:
x=47, y=68
Step-by-step explanation:
Add the two equations. Then we get
-y=-68
y=68
Substituting the value of y in the first equation,
8x-6(68)=-32
8x-408=-32
8x=376
x=47
Answer:
70cm
Step-by-step explanation:
,
Since, both of the tank posses the same quantity of water then there volume is the same thing
For rectangular base
Volume= (Lenght × breadth × hheight)
If we substitute values
Lenght= 80 cm
Breadth= 70 cm
height= 45 cm
Volume= 80cm × 70cm × 45cm
Volume= 252000cm^3
For square base
Volume= (side)^2 × height
side =60cm.
But volume of square base= volume of
rectangular base
252000cm^3= 60^2 × height
Height= (252000cm^3)/(60^2 )
Height= 70 cm
Hence, the second tank is 70 cm deep
The answer is b, c, and d
