Let's answer question 3 first, because by solving it through the quadratic formula, we actually get the discriminant for free and it's easy to get the axis of symmetry.
In this quadratic, 2x²- 12x + 7 the values for the quadratic formula are a = 2, b = -12, c = 7. (Read the coefficients with a for the squared term, b for the x term, c for the number).
The axis of symmetry is at x =
Remember that part? That's half of the quadratic formula.
x =
(You often see the plus or minus part, but this chat box doesn't have that key.) Also, the discriminant is the other half - the b²-4ac part. That is 12²-4(2)(7) = 144 - 56 = 88.
Thus, are the solutions, the axis of symmetry is at x =3, and the discriminant is 88.
Answer: 25t+45m
Step-by-step explanation:
Really simple because if they traveled 25mi/h for t hours, that makes it 25t miles. They traveled 45mi/h for m hours so it's 45m. If you add them together, 25t+45m.
If this helped, brainliest please.
Y=mx+b Is Used To Find Slope Or Is The Slope Formula In General If I Understand Correctly. mx Is Basically Your Slope And b Is Your y-intercept. So Lets Say b Is 9, You Would Go To (0,9) And Make A Point, And Lets Say mx is 3, Which Will Be 3x. So You Would Do Rise Over Run (3 over 1). Go Up 3 And Go To The Right (since 3 is positive) 1 And Keep Repeating Till Your Graph Stops, then You Would Do The Same Thing But Instead Goind Down (negative). So You Would Go Down 3 from (0,9) and Left 1 and Then You Would Draw A Line Through It.
I dont know If I Helped But Yeah..
Answer: 40°
<u>Step-by-step explanation:</u>
There are 4 pink angles (labeled as "a") and each are the same measure.
There are 4 green angles (labeled as "b") and each measure 50°.
A circle is 360°
4a + 4b = 360
4a + 4(50) = 360
4a + 200 = 360
4a = 160
a = 40
In a pond there are 56 fish.
12 of the fish in the pond are red that means that 44 of the fish are not red.
We can use the fraction to represent the 12 red fish out of all the fish together.
can be reduced by dividing both the numerator and denominator by the greatest common factor of 12 and 56. reduced is .
3 ÷ 14 = 0.21428571428571
0.21428571428571 × 100 = 21.428571428571%
Therefore, 21.428571428571% of the fish are red.