Distribute – 3 (-3x2 + 5x).
1 answer:
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Answer:
<em>Sam is 30 years old, and Harry is 10 years old.</em>
Step-by-step explanation:
Let us assume that the age of Sam is x and the age of Harry is y.
Sam is currently is three times Harry's age.
So, ----------------------1
Sam's age is also 10 more than twice Harry's age.
so, ---------------2
Subtracting 2 from 1, we get
putting this in equation 1,
Therefore, Sam is 30 years old, and Harry is 10 years old.
Answer:
1: x-intercept(s): (,0)
y-intercept(s): (0,10)
2: x-intercept(s): (13,0)
y-intercept(s): (0,−)
Step-by-step explanation:
Answer:
x = 1, -5.56
Step-by-step explanation:
x^2 = -7x - 8
shift -7x and -8 to the other side . Remember when u shift minus changes into plus.
x^2 + 7x + 8 = 0
using quadratic equation formula
in quadratic equation one value comes positive and other comes in negative
a = 1 , b = 7 and c = 8
taking positive sign
x = (-b + ) /2*a
x = (-7 + ) /2*1
x = (-7 + ) /2
x = (-7 + )/ 2
x = -7 + 9 / 2
x = 2/2
x = 1
taking negative sign
(-b - ) /2*a
x = (-7 - ) /2*1
x = (-7 - ) /2
x = -7 - / 2
x = -7 - 4.12 / 2
x = -11.12/2
x = -5.56
therefore x = 1 , - 5.56