1. Use the FOIL (first, outside, inside, last) method:
F: x*x=x^2
O: x*-2=-2x
I: 3*x=3x
L: 3*-2=-6
x^2-2x+3x-6
<em>*Combine like terms*</em>
x^2+x-6
2. Look for the greatest common factor (GCF) of 15 and 5. It is 5 (15/5=3 and 5/5=1)
5(3x+1)
3. You want to find two numbers whose product is 6 and whose sum is -5. -3 and -2 complete these requirements.
(x-3)(x-2)
4. Solve for x:
<em>*Add x to both sides*</em>
y+x=ab
<em>*Subtract y from both sides*</em>
x=ab-y
8. Plug in 0.5 for x and solve:
10-8(0.5)
10-4
6
10. <em>*Multiply both sides by 5*</em>
2x-3=20
<em>*Add 3 to both sides*</em>
2x=23
<em>*Divide both sides by 2*</em>
x=23/2
I did what I could. Hope I could help!!
Answer:
1:21
Step-by-step explanation:
Easiest trick way to do this is do 26/546 on your calculator (if you got a scientific one) this would simplify this to its lowest fraction which can be converted into a ratio in this case the ratio of teachers to students is 1:21
Answer:
I just learned this topic and have the same question, so I'm not sure if this right. However, I see a fellow student struggling and have to at least put in what I know. My equation was f(n) = 64(1/2)^n-1, then the question was write an expression to represent f(20).
Step-by-step explanation:
So, my answer was f(20) = 64(1/2)^19
f(20) is the number you plug into n. And because the exponent is n-1, I knew to subtract 1 from 20 to get 19.
Then I just wrote the equation out like the original expect with the numbers pluged in: f(20) = 64(1/2)^19
I hope this helps!
