Answer:
25a-20
Step-by-step explanation:
15a+10a-20=
25a-20
Answer:
The percent of error in her measurement is 1.3%
Step-by-step explanation:
we know that
The circumference of a circle is equal to

where
D is the diameter
we have

assume

substitute
----> This value represent the 100% (theoretical value)
Find the difference between the theoretical value and the measured value
Find the percentage by proportion

Answer:
x 0.4
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
It would be D
Hope this helps! :)
~Zain
Answer:

Step-by-step explanation:

<h3>i) simplify the complex fraction</h3>

<h3>ii) simplify the equation using cross multiplication</h3>


<h3>iii) swap the sides of the equation</h3>

<h3>iv) divide both sides of the equation by -6</h3>


<h3>v) simplify the fraction</h3>
