X^2+4x+4=8
-8 -8
subtract 8 from both sides
x^2+4x-4=0
now factor using quadratic formula
ax^2+bx+c=0
x= -b +-[ (sqrt (b^2-4ac))/2a ]
x=-2(1+sqrt(2))
x= 2(sqrt(2) -1)
hope that helps, hopefully you know how to plug and chug into quadratic formula. if not you can ask for help
Answer:
Step-by-step explanation:
As per diagram, the two triangles are similar, as all angles are congruent (one is vertical, one is right, one is the
Let the distance across the river be x.
<u>The ratio of corresponding sides is same. Find x using ratios:</u>
- x/45 = 75/60
- x = 45*75/60
- x = 56.25 feet
Answer:
You only got 7, 8, and 9 wrong
Step-by-step explanation:
it said convert to percents not fractions. Number 7 is 35%, number 8 is 80%, and number 9 is 126%
Looking at the purple area, we see that 1≤y≤3. So we can immediately reject answers (d), (a).
Since the purple area is to the right of and above the sloping line, we choose answer (c).
The correct answer to the whole problem is (c).
Answer:
She spent 2 1/5 of her allowance
Step-by-step explanation:
SOOOO, 3 and 5 multiplied make 15.. Right?
So, what is 1/3 of 15? it's 5
So, what is 2/5 of 15? It's 6
so 5+6=11
11/15
and reduce
so 2 1/5
I hope this helps
