Step-by-step explanation:
2×-3. don't worry about the - for now. 2 times 3 is 6. so 6/5 improper fraction. plus 1. 1 6/5. yeah
X=27
You have to divide 4x=108 and you get 27!
This is the concept of application of quadratic expressions. Given that the height of the ball is modeled by the equation;
h=-7.3t^2+8.25t+2.1+5
The time taken for the ball to hit the ground will be given as falls;
-7.3t^2+8.25t+7.1=0
to solve for t we use the quadratic formula;
t=[-b+/-sqrt(b^2-4ac)]/(2a)
a=-7.3, b=8.25, c=2.1
t=[-8.25+/-sqrt[8.25^2+4*7.3*7.1]/(-2*7.3)
t= -0.572
or
t=1.702
since there is not negative time we take the time taken for the ball to hit the ground will be: t=1.702 sec
Answer:
The sister is 20
Step-by-step explanation:
The sister is 4 years younger than the girl.