Only ONE will NOT have a red face ...the one in the dead middle so 26 WILL have a red face
2 out of (3+2) are boys 2 out of 5 is 2/5 = 40 % are boys
The x coordinate of this dome shaped parabola's vertex will be given by x = - b/2a where b = 8 and a = - 2
x = 2
use this value in the equation to calculate the y coordinate as - 7
There is only one 00 year between the dates given : 2000
2000 / 900 = 2 remainder 200 so the answer is ONE
Here is a Venn Diagram of the description: the students who took none will be: n - (sum of all numbers) (where n= 100)
Similar:
https://web2.0calc.com/questions/can-someone-help_19
Vertex form of the parabola
y = a ( x+2)^2 -1 sub in 0,6 to calculate 'a'
6 = 4a - 1
7 = 4a
a = 7/4
y = 7/4 (x+2)^2 -1 expand and simplify to the form you need (quadratic)
y = 7/4 (x^2 + 4x + 4) -1
y = 7/4 x^2 + 7x +6
The determinat of the quadratic formula must = 0 for only one solution to the equation
b^2 - 4ac = 0
20^2 - 4(a)(7) = 0 solve for 'a' ........... you can finish, right?
Each sticker is 2x2 = 4 in2
The poster is 2 FEET x 3 FEET 1 foot = 12 inches
2 * 12 x 3 * 12 = 864 in2
864 / 4 = 216 stickers needed
Total distance 50 miles
30 minutes @ 60 m/ hr = 30 miles 20 miles to go
30 minutes @ 25 m/hr = 12.5 miles 7.5 miles to go
last 30 minutes she went 7.5 miles 30 minutes = 1/2 hr 7.5 miles / (1/2 hour) = 15 m/hr during last 30 minutes
