please answer these questions
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Step-by-step explanation:
13)
In ∆ABC, angle ACD is an exterior angle and angle CAB=60° and angle ABC =70°
we know that
"The exterior angle of the triangle is equal to the sum of two opposite interior angles".
=>angle ACD=angle CAB+angle ABC
=>X=60°+70°
=>X=130°
The value of X =130°
14)
Given fractions are 2/3 and 9/5
Their product=(2/3)×(9/5)
=>(2×9)/(3×5)
=>18/15
=>6/5
The product of 2/3 and 9/5=6/5
15)
Given fraction= -33/69
It can be written as=-(3×11)/(3×23)
Cancelling 3 ,then
-33/69=-11/23
The standard form of -33/69= -11/23
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