Answer:
Katie saved $20.
Step-by-step explanation:
I assume that "served" is a typo for "saved". Also, I assume that Tata and Ted are the same person.
Let the amount Katie saved = k
Then, ted saved $6 less than 4 times k, or 4k - 6.
The total saved by both is k + 4k - 6.
The total saved by both is $94.
k + 4k - 6 = 94
5k - 6 = 94
5k = 100
k = 20
Answer: Katie saved $20.
I am going to do the first 2 problems and show my work that way you know how to do it yourself.
So first of all, the foil method:
(a+b) (c+d) = ac+ad+bc+bd
1. (3xy-1) (4xy+2) = (3xy*4xy) + (3xy*2) + (-1*4xy) + (-1*2)
(3xy-1) (4xy+2) = (12x^2y^2) + (6xy) + (-4xy) + (-2)
(3xy-1) (4xy+2) = (12x^2y^2) + (6xy-4xy) - 2
(3xy-1) (4xy+2) = 12x^2y^2 + 2xy - 2
2. <span>(2x-3y) (4x-y) = (2x*4x) + (2x*-y) + (-3y*4x) + (-3y*-y)
(2x-3y) (4x-y) = (8x^2) + (-2xy) + (-12xy) + (3y^2)
</span> (2x-3y) (4x-y) = 8x^2 + (-2xy-12xy) + 3y^2
(2x-3y) (4x-y) = 8x^2 - 14xy + 3y^2
I hope this helps!
Answer:
(A) looks right
Step-by-step explanation:
I am sorry if i am wrong
Answer:
y = $38.97
y = 6.495(5) + 6.495
Step-by-step explanation:
So for this problem, since it states the cost and length of the subscription are related, you can use the two subscription costs as data (or coordinate) points.
1 year = 12.99, 3 year = 25.98; so (1,12.99), (3, 25.98) use these points to calculate the average rate of change (or the slope (m)).
(y - y1)/(x - x1) = m so, (25.98-12.99)/(3 - 1) = 6.495, this is the slope, m
y = 6.495(x) + b now just pick one of the points and put in the x and y values to solve for b
12.99 = 6.495(1) + b solve for b and you discover it also = 6.495 = b
so y = 6.495(x) + 6.495 is the equation of the line, to answer their question, just pop in x=5 for the 5 years subscription cost
y = 6.495(5) + 6.495
y = $38.97
Answer:
well if it helps 1/4
Step-by-step explanation: