Answer:
1.46666666667
Step-by-step explanation:
The answer is (90 cm) hope it helps and have a good one!
PART A:
The given quadratic equation is 2x²-10x-8=0
The radicand is given by b²-4ac where a, b, and c are the constants in a quadratic form ax²+bx+c
From the given equation, we have
a = 2
b = -10
c = -8
Radicand b²-4ac = (-10)² - 4(2)(-8) = 100 + 64 = 164
The radicand is >0 hence the quadratic equation has two distinct roots
PART B:
4x²-12x+5 = 0
We can use the factorization method to solve the equation
Firstly, we multiply 4 by 5 to get 20
Then we find the pair of numbers that multiply gives 20 and sum gives -12
The pair of number is -2 and -10
Rewriting the equation
4x²-2x-10x+5 = 0
2x(2x-1)-5(2x-1) = 0
(2x-1)(2x-5) = 0
2x-1 = 0 and 2x-5 = 0
x = 1/2 and x = 5/2
Answer:
Phil donated $900, Laverne donated $2,750, Andre donated $3,500
Step-by-step explanation:
6000*0.15 = 900
11000*0.25 = 2,750
1400*2.5 = 3500
Answer: c. -3.8
Step-by-step explanation:
-9 1/5-10+2/5+2(14 1/2-70 simplifies to -46/5-10+2/5+2(29/2-7)
reduce numbers: -46/5-10+2/5+2x15/2
-46/5-10+2/5+15
-44/5+5= -19/5 = -3.8