The best definition of the properties of equality is: A group of rules that help you understand how each side of an equation is related to the other.
<h3>Equation</h3>
By definition, an equation is a mathematical expression with an equality sign separating each side of the expression.
- In which case, each side of the equation is equal to the other.
Read more on equations:
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The father say to his son, that’s his father in the photograph.
Answer:
y = 45x miles
Step-by-step explanation:
Speed is the rate of change of distance with time. Mathematically,
speed = distance/time
Given that Darla travels at a constant speed of 45 miles per hour and for y miles, it takes her x hours then
45 = y/x
multiply both sides by x
45x = y
then the number of miles (y) Darla can drive in x hours
y = 45x (in miles)
X - the number of pencils
y - the number of pens
She has twice as many pencils as she has pens.
Tom borrows a pen, so she has y-1 pens. Now she has ten less pens than pencils.
Set 2y and y+9 equal to each other:
She has 9 pens.
Answer:
$4.72
Step-by-step explanation:
16.79+28.49=45.28
50-45.28=4.72