Answer:
The first two is x=60
Step-by-step explanation:
1.5/90 = 1/x
1.5x = 90 x 1
1.5x/1.5 = 90/1.5
x = 60
Answer:
x = -1 , y = 6
or (-1, 6)
Step-by-step explanation:
First solve for "y" in the second equation:

and now, use this result as a substitution for "y" in terms of "x" in the first equation:

Knowing the value of "x", now we place it in the substitution equation to find "y":

I like that you left How you did it on there. When I was in school I did it the same way. I would assume you’re using is over of equals percent over 100. The problem however is that the above number is always the total which means it should be on the bottom.
X/72= 45/100. Similar to what you have written. Solve the proportion. 100x=72x45
100x= 3240
X = 32.4
Answer:

Step-by-step explanation:
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Hope this helped!
<h3>~AnonymousHelper1807</h3>
Answer:
Engineering
Step-by-step explanation:
Start by eliminating illogical choices: dentistry, business, literature.
That leaves science and engineering.
Designs of suspension bridges usually include half parabolas or half hyperbolas, which indicates that engingeering is the logical choice here.
Science is discovery and understanding of the natural, physical world, whereras engineering is the application of knowledge and tools, of which space curves (such as hyperbolas) are one.