The answer to number 1 is not accurate,the answer to number 2 is accurate, and the answer to number 3 is 102 pounds.
<u>Answer:</u>
(x, y) = (1, 1)
<u>Step-by-step explanation:</u>
--- (1)
--- (2)
Multiplying (2) by -2 to get:
--- (3)
Adding (1) and (3) to get:
------------------------------------
x = 1
Finding y:
y = 1
Therefore, (x, y) = (1, 1).
Answer:
21 students were in the class.
Step-by-step explanation:
The information in the question tells you that 4/7 of the class is girls.
That means that the remainder of the class is 1 - 4/7 = 3/7 boys
Let the total in the class = x
(3/7)x = 9 Multiply by 7
(3/7)*7*x = 9 * 7 Simplify the right and left
3x = 63 Divide by 3
3x/3 = 63/3
x = 21
There were 21 students in the class.
I hope this helps you
A=Area
b=base
h=height
A=b×h/2
A=1/2.b+1/2.h
Since k is constant (the same for every point), we can find k when given any point by dividing the y-coordinate by the x-coordinate. For example, if y varies directly as x, and y = 6 when x = 2, the constant of variation is k = = 3. Thus, the equation describing this direct variation is y = 3x.
