Answer:
114
Step-by-step explanation:
z = (x − μ) / σ
0.93 = (x − 100) / 15
x ≈ 114
Hi there!
We are given the equation 20 + 6c - 2c², and are told to factor it. Well, to do this, we can first rearrange the terms in decreasing order: -2c² + 6c + 20. Next, we see that we can take out a common factor -2 from the whole equation. This gives us -2(c² - 3c - 10). Now, we take the constant term, -10, and we find all it's factors.
-1 10
-10 1
-5 2
-2 5
Now, find the sums of the factors.
-1 + 10 = 9
-10 + 1 = -9
-5 + 2 = -3
-2 + 5 = 3
We see that the only pair of factors that add up to -3 are -5 and 2. Now, we can factor the whole equation to -2(c + 2)(c - 5). Hope this helped!
8000 + 400x= y
5% of 8000 is 400 so add an additional 400 every year to find its value (y)
I can't read number 15, but number 16 is C
Answer:
g=2
f=5
Step-by-step explanation:
- add g to the other side on the 2nd equation. you should get f=7+g
- now replace the f in the top equation with 7+g. the equation should now look like 7+g +3g = 15
- combine like terms to get 7+4g=15
- subtract 7 from both sides to get 4g=8
- divide by four to get g=2
- now plug 2 in for g in the 2nd equation to get f-2=7
- add 2 to both sides and get f=5