B- 1/2 the books are science books. You have to add the two fractions and subtract that from one.
The measure of CB from the given figure is 8cm
<h3>What is a triangle?</h3>
A triangle is 2 dimensional shape with 3 sides and angles. The types of triangle that we have are;
- Equilateral triangle
- Scalene triangle
- Isosceles
The given triangle is a scalene triangle since <u>none of the sides are equal</u>
From the figure shown, we can see that the mea<em>sure of DF is equivalent to CE and EB</em>
Since CB = CE + EB
Given the following parameter
DF = 4cm
CE = EB = DF = 4cm
Substitute
CB = 4cm + 4cm
CB = 8cm
Hence the measure of CB from the given figure is 8cm
Learn more on triangles here; brainly.com/question/25215131
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The formula of a distance between two points:

We have the points P(2, 2) ans Q(7, 4). Substitute:

<h3>Answer: PQ = 5.4</h3>
Just take it in co-ordinate pairs
Take two points
Slope:-




Equation of line in point slope form




- Convert to slope intercept form y=mx+b

Graph attached