Question 1 - the first choice is right
Question 2- the first choice also
Answer:
91
Step-by-step explanation:
155-16s²
155- 16x2²
155- 16x4
155-64
91
X=7
Step 1: add nine to both sides it becomes
-2x=-23+9 —> -2x=-14
Step 2: divide by -2 on both sides it becomes
X=-14/-2 —> x=7
Step-by-step explanation:
i think this would be the right answer...
Answer:
(143/74, -65/148)
Step-by-step explanation:
We have the equations:
4x - 12y = 13
14x + 32y = 13
Let's use elimination, so multiply the first equation by 8 and the second equation by 3:
8 * (4x - 12y = 13) ⇒ 32x - 96y = 104
3 * (14x + 32y = 13) ⇒ 42x + 96y = 39
Add those two equations:
32x - 96y = 104
+ 42x + 96y = 39
________________
74x + 0y = 143
Divide both sides by 74:
x = 143/74
Plug this into an equation to find y:
4x - 12y = 13
4 * (143/74) - 12y = 13
12y = 572/74 - 13 = -390/74
y = -65/148
The answer is (143/74, -65/148).
