Let s and d represent the number of sit-ups Jerry does and the number of days Jerry has been doing them (not counting the first), respectively. The problem statement tells us
s = 16 + 2d
This is the equation that can be solved to find d.
_____
Here is its solution.
Since we want to find d (the number of days), we can subtract 16 and divide by 2.
s - 16 = 2d
(s - 16)/2 = d
d = (s/2) - 8
Example:
Today Jerry did 22 sit-ups. He has been doing them for ...
(22/2) - 8 = 11 - 8 = 3 . . . days
You need to add 2 L of the 75% mixture to get a mixture that is 60% antifreeze.
<h3>What is an antifreeze?</h3>
Anti freeze is a substance that is added in order to prevent a liquid from freezing. An antifreeze is usually an ionic substances that is used during the winter to prevent the freezing of a liquid.
Now;
Forming the equation;
0.75*x+0.5*3=0.6(3+x)
Hence;
0.75*x+1.5=1.8+0.6x
Therefore;
0.75x-0.6x=1.8-1.5
We obtain;
0.15x=0.3
Then;
x=2L
Learn more about antifreeze:brainly.com/question/14789254
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Answer: yes the ratios 1:9 and 5:45 are equivalent.
Step-by-step explanation:
1:9*5:5=5:45
U got any more math questions that I can answer? I’m really bored and I have to stay busy!
You can comment below, are these supposed to be simply equations or piecewise functions?
Answer:
slope is 7/3
Step-by-step explanation:
rise/run
7/3