!!MATH GENIUSES HELP ME!!
1 answer:
Answer:
D
Step-by-step explanation:
Let x be Bill’s scores.
Let y be Theo’s scores.
x + y = 90
x² = y
Solve for x in the second equation.
x = √y
Put x as √y in the first equation and solve for y.
√y + y = 90
√y = 90 - y
y = (90 - y)²
y = - y² - 180y - 8100
0 = -y² - 181y - 8100
0 = (-y+81)(y-100)
-y+81=0
y = 81
y - 100 = 0
y = 100
100 does not work if we plug in to check, so y is 81.
y = 81
Put y as 81 in the first equation and solve for x.
x + 81 = 90
x = 9
Bill scored 9 goals and Theo scored 81.
You might be interested in
6x⁴ + 7x² - 10
6x⁴ - 5x² + 12x² - 10
x²(6x²) - x²(5) + 2(6x²) - 2(5)
x²(6x² - 5) + 2(6x² - 5)
(x² + 2)(6x² - 5)
Answer:
78
Step-by-step explanation:
plug in -3 as x
6(2(-3)^2-5)
6(2(9)-5)
6(18-5)
6(13)
78
Answer:
5(–9a–1)+7=0
5(-9a-1)=-7
-9a-1=-7/5
9a+1=7/5
9a=7/5 +1
a=(7+5)/(5×9)=35/45=7/9
Right triangle would be the answer your looking for>
