Perpendicular lines will have negative reciprocal slopes
B. y = -4x+ 5 and y = 1/4x + 4
D. y = x + 4 and y = -x + 4
E. y = -3 and x = -3
First, let's multiply the first equation by two on the both sides:
<span>8x + 7y = 39 /2
</span>⇒ 16x + 14y = 78
Now, the system is:
<span>16x + 14y = 78
</span><span>4x – 14y = –68
</span>
After adding this up in the column:
(16x + 4x) + (14y - 14y) = 78 - 68
20x = 10
⇒ x = 10/20 = 1/2
y can be calculated by replacin the x:
<span>8x + 7y = 39
</span>⇒ 8 · 1/2 + 7y = 39
4 + 7y = 39
7y = 39 - 4
7y = 35
⇒ y = 35 ÷ 7 = 5
Answer:
9. It seems he was inactive/taking a break, as the line is completely straight.
I'm not sure about the others, but I hope that helps!
Step-by-step explanation:
Answer:
u= -449
Step-by-step explanation:
714=6(u+629)-366
<u>+366 +366</u>
1080=6u+3774
<u>-3774 -3774</u>
6u=-2694
<u>÷6 ÷6</u>
u=-449
Answer:
magma blocks
Step-by-step explanation:
by using your die you can eat as many magma blocks as you want, keep in mind. your goal is to get to dragon level. they eat the fastest! you need to consume atleast 5 magma blocks to reach level dragon. (i hope this can help you)