Answer:
<u>(x + 3)(x - 7)</u>
<u>(x + 1)(x - 2)</u>
Step-by-step explanation:
The general form of factored equations :
<u>y = (x + a)(x + b)</u> [it can be ±, so don't worry about that part]
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Hence, the expressions which are in factored form :
⇒ <u>(x + 3)(x - 7)</u>
⇒ <u>(x + 1)(x - 2)</u>
Answer:
6.25 grams
Step-by-step explanation:
Since we need to find the number of half-lives in 26.3 years, we simply divide 26.3 yrs by 5.26 yrs which yields 5 half-lives. This means that in 26.3 yrs the 200 grams of cobalt-60 will undergo 5 half-lives.
To obtain the remaining amount we simplify the expression;
A = 200*(1-0.5)^(26.3/5.26)
= 200*(0.5)^(5)
= 6.25 grams.
Therefore, the amount of a 200 g sample of colbalt-60 that will remain after 26.3 years is 6.25 grams
So being that it is 18% you add 18% and 25%
18+25=43
so the answer is 43%
:)
Answer:
3.36
Step-by-step explanation:
Just make the equations equal to each other. -0.5x+5=3x-2. Solve for x and find that it is 2, via simple algebra. Since you know x is 2, sub it in in either equation to find y. y should be 4. So the point that fits both equation is (2,4). This shows that the two graphs of these lines will intersect at this exact point.
If you were to graph these two lines, you ould see that the point of intersection is at (2,4) like we solved for.