Answer:
B. y = -4x + 15
C. 16x + 4y = 9
D. y=-4X
Step-by-step explanation:
Two lines are parallel if they have the same slope. The equation of a line is:
y = mx + b
Where m is the slope and b is a constant.
So, the slope of the first equation can be calculated solving the equation for y as:
8x + 2y = 7
2y = - 8x + 7
y = -4x + 7/2
So, the slope is -4.
It means that all the equations that could represent lines that could also be drawn for his art project are the equation with a slope equal to -4.
Then, for every option, we get:
A. y-1 = 4(X + 8)
y = 4x +32 +1
The slope is 4
B. y = -4x + 15
The slope is -4
C. 16x + 4y = 9
4y = -16x + 9
y = -4x + 9/4
The slope is -4
D. y=-4X
The slope is -4
E. 4x + 2y = 3
2y = -4x + 3
y = -2x + 3/2
The slope is -2
Finally, the equations that are parallel to the line 8x + 2y = 7 are equations B, C and D
Answer:
i think 2 not really sure
Answer:
21 ÷ 1.4
Step-by-step explanation:
Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour.
The temperature had fallen 21 degrees, so it passed
hours after she had first checked the thermometer.
She had first checked the temperature at 3 p.m.
Answer: A. -1
Step-by-step explanation:
(x - 2)2 + 5(x - 2) = -6
2x-4 + 5x -10= -6
Combine like terms
7x-14=-6
Add 14 to both sides
7x=8
Divide
X= 8/7 or 1.14 (rounded)
1.14 - 2= -0.86 which can be rounded to -1
Answer: x ≤ 3
Step-by-step explanation:
4x ≤ 12
divide each side by 4
x≤3