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Give the introduction to Ratios and Proportions?
A ratio represents a comparison between two values. A ratio of two numbers can be expressed in three ways:
A ratio of "one to two" can be written as:
1 to 2 or 1: 2 or 1/2A proportion is made up of two ratios with an "=" (equal) sign between them.
For example:
1/2 = 2/4
Solving Proportions With One Unknown When a proportion is written with one unknown number, the unknown is usually represented by "x".
To solve for an unknown in a proportion: 1. Cross-multiply: multiply the numbers that are diagonal to each other.2. Set the two products equal to each other.3. Divide both sides by the number next to the x.
A round balloon of radius 'a' subtends an angle θ at the eye of the observer while the angle of elevation of its centre is Φ.Prove that the height of the center of the balloon is a
((1-x)/(1+x))^0.5
adison earned $25 mowing her neighbor''s lawn. then she loaned her friend $18, and got $50 from her grandmother for her birthday. she now has $86. how much money did adison have to
Express the GCD of 48 and 18 as a linear combination. (Ans: Not unique) A=bq+r, where o ≤ r 48=18x2+12 18=12x1+6 12=6x2+0 ∴ HCF (18,48) = 6 now 6
Solve 6 sin ( x/2)= 1 on [-20,30] Solution Let's first work out calculator of the way since that isn't where the difference comes into play. sin( x/2)= 1/6 ⇒x/2= sin
Find the coordinates of the point P which is three -fourth of the way from A (3, 1) to B (-2, 5).
briefly explain how the famous equation for the loss of heat in a cylindrical pipe is derived
Lucy's youth group increased $1,569 for charity. They decided to split the money evenly between 3 charities. How much will each charity receive? Divide the money raised through
you are driving on a freeway to a tour that is 500 kilometers from your home. after 30 minutes , you pass a freeway exit that you know is 50 kilometer from your home. assuming that
Confidence Interval The interval estimate or a 'confidence interval' consists of a range as an upper confidence limit and lower confidence limit whether we are confident that a
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