Answer:
x = 5
Step-by-step explanation:
x + (3x - 2) = 18
x + 3x - 2 = 18
4x - 2 = 18
+2 +2
--------------------------
4x = 20
/4 /4
--------------------------
x = 5
Answer: 7 hours
Explanation: We can use the equation 93=9h+30 to represent the problem.
When we solve for h with (93-30)/9, we get 7 hours.
We can determine the mass of liquid mercury inside the vial by taking the diffrence between the filled vial and the empty vial. The weight of liquid mercury is 130.24 grams. The equivalent volume is obtained through the density. The volume is 9.626 cm3. If the substance inside is water, the volume is 130.632 grams
W= width
L= length= 2W-4
Perimeter= 70
FIND WIDTH:
P= 2(L + W)
P= 2L + 2W
substitute 2W-4 for L
70= 2(2W-4) + 2W
multiply 2 by all in parentheses
70= (2*2W) + (2*-4) + 2W
70= 4W - 8 + 2W
combine like terms
70= 6W - 8
add 8 to both sides
78= 6W
divide both sides by 6
13= W
FIND LENGTH:
substitute w=13 to find width
L= 2W-4
L= 2(13)-4
L= 26-4
L= 22
CHECK:
P= 2(L + W)
70= 2(22 + 13)
70= (2*22) + 2(13)
70= 44 + 26
70= 70
ANSWER:
length= 22 inches
width= 13 inches
Hope this helps! :)
Answer:
let the size of the real item be x
then the size of model as prodived will be =
60% of X
60/100 × X
=3X/5 .