that is the solution to the simultaneous equation
First, start by transferring a liter to a gallon. 3.78 liters in 1 gallon.
This means they pay 1.65*3.78=6.24 euros per gallon of gasoline. If the conversion is 1 us dollar = .76 euros, set up a proportion where x$=6.24euros.... .76x=6.24.... x=$8.21
Next, do the reverse. One liter is .26 gallons, meaning we pay 3.90*.26=$1.01 for a liter of gas. Convert this back into euros by multiplying it by .76... 0.77 Euros
Simple Proof:
a) In the image, we know that ABCD is a parallelogram and that means opposite angel measures should be the same. We know that angel DCB is made up by angel 1 and 2, and angel DAB and DCB are equal and angel DAB is made up by angel 1 and <em>x</em>. So now we can conclude that angel <em>x</em> is equal to angel 2.
b) According to the definitions of a parallelogram, opposite angel measures have to be the same, while AECF have angle 1 to angel 1 and angel 2 to angel 1. We can conclude that AECF is <u>NOT</u> a parallelogram. (Sorry, you didn't give me the full question so some information remains unclear. )
K is the midpoint of JL...so JK=KL=7
JL=(JK + KL)>>>>>>whole part axiom
or,4x=2×JK>>>>>>>{JK=KL➡JK+KL=JK+JK}
or,4x=2×7
or,x=14/4=7/2
[ x=7/2 ] [KL=JK=7] and [JL=4x=(4×7)/2=14]
65 miles per hour I believe because 487.5 divided by 7.5 is 65.
