the answer would be d because it goes down 2 and over 1
So, in 4 days, the lake lost 3.5 liters, and you need to solve for how many were lost each day.
There are two ways to do this; one involves writing an equation, the other does not. It pretty much just depends what your teacher expects from you.
The easiest way is to simply divide 3.5 by 4; this will tell you how many liters were lost each of those four days.
The other way does the same thing, but a little more algebraically...
3.5 liters per day were lost- this can be written as a ratio: 3.5 liters/ 4 days.
You need to solve for x liters/ 1 day.
Since these are equivalent, you set them equal to each other:

From here, you can cross multiply to get 3.5=4x
Then simply divide both sides by 4 (to isolate the variable) and you get 1.5=x.
Since the variable x represented the number of liters lost in 1 day, you can write your answer as 1.5 liters.
So, the simple answer is: the average change in the water volume each day was 1.5 liters.
Answer:
true
Step-by-step explanation:
given
=
( cross- multiply )
4x = 40 ( divide both sides by 4)
x = 10
Answer: 33/4 miles per hour
Step-by-step explanation:
Hi, to answer this question we simple have to divide the distance travelled by the bike (2 3/4) by the time spent (1/3)
Speed rate = distance /time
Replacing with the values given:
S = 2 3/4 ÷ 1/3 = (2x4+3)/4 ÷1/3 =11/4 ÷1/3= 33/4 miles per hour
Feel free to ask for more if needed or if you did not understand something.
Answer:
Mrs. Wang is 38 years old and her daughter is 15 years old.
Step-by-step explanation:
Explanation:
Let
x
=
the daughter's age
Mrs. Wang is
23
years older, so her age is
x
+
23
In five years, the daughter will be
x
+
5
years old
In five years, Mrs. Wang will be
x
+
23
+
5
=
x
+
28
years old
And, in five years the sum of their ages will be 63, so...
x
+
5
+
x
+
28
=
63
Combine like terms
2
x
+
33
=
63
a
a
−
33
a
−
33
a
a
a
Subtract 33 from both sides
2
x
a
a
a
a
a
=
30
2
x
2
=
30
2
a
a
a
Divide both sides by 2
x
=
15
a
a
a
The daughter is 15
x
+
23
=
15
+
23
=
38
a
a
a
Mrs. Wang is 38