What protractor do you mean? And what angle?
Answer:
b =-6
Step-by-step explanation:
y= 2x^2 +bx+8
Put this in vertex form
2( x^2 + b/2 ) +8
2 ( x^2 + b/2 + b^2/4) +8 - 2(b^2/4)
2 ( x+ b/2) ^2 +8-b^/2
The x coordinate of the vertex is -b/2
The x coordinate from the graph is 3
3 = -b/2
-6 =b
Answer:
So the solution is -2<x<4 with it's graph is
O~~~~~~O
------(-2)--------(4)-----------
Step-by-step explanation:
The intersection symbol means it has to be included in both sets.
We have that x<4 and x>-2.
If we graph this, where do we see both shadings:
~~~~~~~~~~~~~~~0 x<4
O~~~~~~~~~~~~~~~~~ x>-2
-------(-2)-------------(4)------------
Both shadings happen between -2 and 4 (and not outside that area).
So the solution is -2<x<4
It's graph is
O~~~~~~O
------(-2)--------(4)-----------
Disclaimer:
I didn't see any equal signs in your problem.
You know the or the so we didn't have any closed dots.
20% x 5 = 100%
Depreciation means decreased of a value
The number of athletes that finished the race this year was 4284 athletes.
What is percentage?
10%, a comparative figure denoting one hundredth of any quantity. One percent, denoted by the symbol 1%, is equal to one hundredth of something; hence, 100 percent denotes the full thing, and 200 percent designates twice the amount specified.
Let x represent the amount of athletes that finished the race this year.
Last year, 3,570 athletes finished the Silvergrove Marathon. This year, the number of runners crossing the finish line was 20% higher. Hence:
x = 3570 + 20% of (3570)
x = 3570 + (0.2 * 3570)
x = 4284
4284 athletes finished the race.
To learn more about percentage from the given link
brainly.com/question/24877689
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