Step-by-step explanation:
x²+4x=8
rearrange
x² + 4x - 8 = 0
half of 4 is 2
so
x² + 4x + 2² - 2² - 8 = 0
do x² + 4x + 2²
multiplies to give 4 adds to give 4
2+ 2
(x + 2)²
(x + 2)² - 2² - 8
(x + 2)² - 4 - 8
(x + 2)² - 12
(x + 2 + √12) (x + 2 - √12)
√12 = √4 * √3 = 2 √3
(x + 2 + 2√3) (x + 2 - 2√3)
Answer:
3 groups of 5 sopranos and 12 altos
Step-by-step explanation:
X + x = 2
1 × 5 = 5
So it would be blank plus blank gives you x=2
Then blank times blank gives you x=5
Step-by-step explanation:
a. y=mx+c
m = rise/run
3/2=m
1.5=m
b. y=1.5x+3
c. y int. x=0 x int. y=0
y=1.5(0)+3 0= 1.5x+3
y= 3 -3=1.5×
1.5x/1.5=-3/1.5
x= 2
d. y-y1 =m(x-x1)
y-3=1.5(×-2)
y-3 =1.5x-3
y-3+3=1.5x-3+3
y=1.5x +0
y int =3 x int =2
Answer:
y =-3
Step-by-step explanation:
4(y+1)=-8
Divide each side by 4
4/4(y+1)=-8/4
y+1 = -2
Subtract 1 from each side
y+1-1 = -2-1
y = -3
