The sum of Sabrina's age and twice her sister's age is equal to their mom's age. If Sabrina's sister is two years older than her
1 answer:
Sabrina is 11 years old.
Step-by-step explanation:
Let,
Sabrina's age = x
Her sister's age = y
Her mother's age = z
According to given statement;
The sum of Sabrina's age and twice her sister's age is equal to their mom's age.
x+2y=z Eqn 1
If Sabrina's sister is two years older than her
y = x+2 Eqn 2
their mom is 37
z = 37 Eqn 3
Putting value of y and z from equation 2 and 3 in Eqn 1
Dividing both sides by 3
Sabrina is 11 years old.
Keywords: linear equation, division
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Answer:
Step-by-step explanation:
we know that
The roots of the quadratic function (x-intercepts) are
x=-1 and x=5/3
so
we can write the equation of the parabola as
where
a is a coefficient
Remember that
The parabola pass through the point (5,40)
substitute the value of x and the value of y of the ordered pair in the quadratic equation and solve for a
x=5, y=40
substitute
apply distributive property
see the attached figure to better understand the problem
Answer:
So f(x) has no real greater than 8. Step - by - step explanation is shown in the attachment.
Step-by-step explanation:
Let f ( x) be a polynomial with real coefficients and with a positive lending coefficient.
If f(x) is divided by x-c and
a) if c>0 and all number in the bottom row of the synthetic division are non negative , then f(x) has no zero greater than c.
b ) if c<0 and the number in the bottom row of the synthetic division alternate in sign then f (x) has no zero less than c
As shown in the figure
Since the number in the bottom row of the synthetic division alternate in sign
So f(x) has no real greater than 8
