Area is equal to length x height. Let us say that the height of the book is x, and then the length would be x-2.
Area = length x height
15 = (x-2)x
15= x^2 - 2x
0= x^2 -2x -15
x = 5
So the length would be (5-2)=3, and the height would be 5.
The overall perimeter would be 2xlength +2xheight so 6+10=16.
Answer:
One
Explanation:
3
y
=
18
x
+
21
XXX
⇔
y
=
6
x
+
7
5
y
+
55
=
30
x
XXX
⇔
y
=
6
x
−
11
both equations are linear and they are not co-linear
therefore there is exactly 1 solutio
Answer:
3
Step-by-step explanation:
Step 1: Isolate <em>y</em>
5y < 20
y < 4
When we figure out the inequality, we see that <em>y </em>has to be less than 4. Therefore, the highest integer value will have to be 3.
B. is correct! Hope this helps!
Answer:
the original population of the city is 7,505,833
Step-by-step explanation:
Given;
new of the population of the city, Y = 9,007,000
the percentage increase of the city, = 20% = 0.2
Let the original population of the city = X
New population, Y = X + 0.2X
Y = X(1 + 0.2)
Y = X(1.2)
Y = 1.2X
X = Y/1.2
X = (9,007,000) / 1.2
X = 7,505,833
Therefore the original population of the city is 7,505,833
