The answer is d now do I get it lol
Step-by-step explanation:
1Ans: 4x = -36
× = -36/4
× = -9
2Ans: 5x -15 = 50
5x = 50 + 15
5x = 65
x = 65/5
x = 13
3Ans: 4(x + 2) -17 = 35
4x +8 -17 = 35
4x -9 = 35
4x = 35 +9
4x = 44
x = 44/4
x = 11
4Ans: 6x +12 = 4x -18
6x -4x = -18 -12
+2x = -30
x = -30/+2
x = -15
5Ans: 1/2 (4x -10) +5 = x -11
0.5 (4x -10) +5 = x -11
2x -5 +5 = x -11
2x = x -11
2x - x = -11
1x = -11
x = -11/1
x = -11
Alright, so we have the difference = 4500-2800=1700. To find the percent increase, we do 1700/2800=around 0.61 = around 61% percent
Answer:
A. 5x² - 7 - 72 = 0
5x² - 79 = 0
x = ± √-4ac / 2a
x = ± √- 4 (5) (-79) / 2 (5)
x = ± √ 1580 / 10
x = ± 39.749/10
x = + 39.749/10 x = -39.749/10
= 3.9749 = - 3.9749
B. x² + 2x - 5 = 0
x = - b ± √b² - 4ac / 2a
= - 2 ± √2² - 4 (1) (-5) / 2 (1)
= - 2 ± √4 + 20 / 2
= - 2 ± √ 24 / 2
x = - 2 + 4.898 /2 x = - 2 - 4.898 / 2
= 2.898/2 = -6.898/2
= 1.449 = - 3.449
C. 3x² + 2x - 4 = 0
x = - b ± √b² - 4ac / 2a
= - 2 ± √2² - 4 (3) (-4) / 2 (3)
= - 2 ± √4 + 48 / 6
= - 2 ± √ 52 / 6
x = - 2 + 7.211 /6 x = - 2 - 7.211 / 6
= 5.211/6 = - 9.211 /6
= 0.869 = - 1.535
Hope that helps
Please to re-check answers