Answer: <em>a + ( 2a - 7 ) = 41</em>
Explanation:
Let be "a" the Nicci's age and "s" the Nicci's sister.
You know that the sum of Nicci's age and her sister's age is 41. This can be represented with the following equation:
<em>a + 8 = 41</em>
And knowing that Nicci's sister is 7 years less than twice Nicci's age, you can write another equation to represent this:
<em>8 = 2a - 7</em>
Now, substitute the second equation into the first equation in order to find the equation that represents this relationship.
Then, this is:
<em>a + ( 2a - 7 ) = 41</em>
<em></em>
<em>Hope it helps...</em>
The answer to the problem is 40in
Answer:
How do you find the sum of factors of a quadratic equation?
Let r and s be the factors for the quadratic equation such that x^2+Bx+C=(x−r)(x−s) where sum of factors (r+s)=−B and the product of factors rs = C r = -2 - u s = -2 + u Two numbers r and s sum up to -4 exactly when the average of the two numbers is \frac{1}{2}*-4 = -2.
How do you solve a quadratic equation?
Quadratic equations such as this one can be solved by completing the square. In order to complete the square, the equation must first be in the form x^{2}+bx=c.
Step-by-step explanation:
Answer: See below
Explanation:
6a + 11 = 2a + 83
6a - 2a = 83 - 11
4a = 72
a = 72/4
a = 18
Answer:
y = -2x -3
Step-by-step explanation:
I love slope-intercept form! lol
y =mx +b
so we have 2 points given: (-1,5) and (4,-5)
to find the SLOPE of the slope-intercept form, we need to subtract and divide
(-5-5)/(4+1)
-10/5= -2 which is our slope
now! lets translate this info into point slope form. y - y1 = m (x - x1)
(-1,5) and we kno the slope is -2.
y - 5 = -2 (x - (-1))
y-5 = -2(x + 1)
y-5 = -2x -2
add five
y = -2x -3 we are back to slope intercept form! YAY!
