8x + 3y = 45 * -2 Negative
2x + 3y = 27 * 8 Positive
-16x - 6y = 90
16x + 24y = 216
24y is equal to 216
y is equal to 216/or 24
y is equal to 9
Which means:
8 + 3y = 216
y = 216/24
y = 9
8x + 3y = 45
8x + 3 (Which is 9) = 45
So the Answer is:
8x=45 - 27
8x= 18
X=18/8
X= 2.25
Hope this helps you
(Good Luck)
Answer:
x = -5 + √65/2 or
x = -5 - √65/2
Step-by-step explanation:
-2x² - 5x + 5 = 0
2x² + 5x - 5 = 0
Here,
a = 2
b = 5
c = - 5
Now,
Discriminant
<em><u>D = b² - 4ac</u></em>
<em><u> </u></em><em><u> </u></em><em><u> </u></em><em><u> </u></em>= (5)² - 4(2)(-5)
= 25 + 40
= 65
<u>D = 65 > 0</u>
Then,
x = -b +-√b² - 4ac/2a
x = -5 +-√(5)² - 4(2)(-5)/2(2)
= -5 +-√25 + 40/4
= -5 +-√65/4
= -5 +-√65/2
<em><u>x = -5 + √65/2 or x = -5 - √65/2</u></em>
Answer:
23.55
Step-by-step explanation:
Radius of cylinder (r) = 1.5
Height of cylinder (h) = 1
Formula for the surface area of a cylinder = 2πrh + 2πr²
Plug in the values
S.A = 2*π*1.5*1 + 2*π*1.5²
S.A = 23.55
5.000or just 5
Hope this helps
Answer Choice A. 
Answer Choice B. 
Answer Choice C. 
<u><em>Answer Choice D. 
</em></u>
The correct answer is <u><em>D. 7√5/5</em></u>
Hope This Helps!!!
