0 = x^2 + x - 72
x^2 + x - 72 = 0
x^2 + 9x - 8x - 72 = 0
X (x + 9) - 8 (x + 9) = 0
(X + 9) (x - 8) = 0
X + 9 = 0
X = -9
X - 8 = 0
X = 8
X (-9,8)
Answer is Option D
x = -9 or x = 8
Answer:
12/13
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
sin theta = opp side / hypotenuse
sin B = 12/13
Answer:. . .
Step-by-step explanation:
Answer:
160 square units
Explanation:
Area of square in the middle: 64 square units
Area of all triangles: 96
Add those together and u get 160
MARM ME BRAINLEST
Answer:
382 children and
312 adults swam
Step-by-step explanation:
Let the number of children be x
And let the number of adult be y
Hence on a hot summer day
x +y = 694 - - - - - - - 1
x= 694-y
Also the daily prices are $ 1.25 for children and $ 2.50 for adults
1.25x + 2.50y= 1257.50-------2
Let us substitute x= 694-y in equation 2
1.25(694-y) + 2.50y =1257.50
867.5-1.25y +2.50y = 1257.50
-1.25y+2.50y= 1257.58-867.5
1.25y= 390
y= 398/1.25
y= 312
Substitute y= 312 in equation 1 to find x
x + 312= 694
x= 694-312
x= 382
Hence 382 children and
312 adults swam