8x + 6y = 10 ----------- (1)
5x - 3y = 2.2 ---------- (2)
(2) x 2:
10 x - 6y = 4.4 --------(2a)
(2a) + (1)
18x = 14.4
x = 1.8 ------- sub into (1)
8 (1.8) + 6y = 10
14.4 + 6y = 10
6y = 10 - 14.4
6y = - 4.4
y = - 0.73
There is 1 set of solution to it. (Answer C)
Answer:
The slope is -3
Step-by-step explanation:
The equation is in y=mx+b form where m is always the slope. In this case, m=-3, therefore that is the slope
Hi there!
If we know the area is a square, we can use the formula for the area of a square to figure out what one side would be between. Knowing the value allows us to determine what it would be between. In this case, it is between 69 and 70.
WORK:
squareroot(4840) = 69.6
ANSWER:
Option B - 69 yd and 70 yd
Suppose

has two roots, reciprocals of one another. Call them

, with

.
Let's divide through

by

for now. By the fundamental theorem of algebra, we can factorize

as

Expand the RHS to get

so we must have


The first equation says

and

occur in a ratio of the negative sum of the roots of

, while the third equation says that the first and last coefficients

must be the same.