To be able to find the number of thistles that are in the vacant lot now using the information provided, you have to calculate the 75% of 64 and then, subtract that number from 64:

64*0.75=48

64-48=16

According to this, the answer is that there are 16 thistles in the vacant lot now.

6 0

3 years ago

Use the quadratic formula to solve 7c^2 + 8c + 1 =0

siniylev [52]

7c² + 8c + 1 = 0
c = -(8) +/- √((8)² - 4(7)(1))
 2(7)
c = -8 +/- √(64 - 28)
 14
c = -8 +/- √(36)
 14
c = -8 +/- 6
 14
c = -8 + 6 c = -8 - 6
 14 14
c = 2 c = -14
 14 14
c = ¹/₇ c = 1

The solution is equal to { 1, ¹/₇}.

4 0

3 years ago

A quadrilateral has angles that measure 60°, 95°, and 150°.

Nikolay [14]

The sum of angles in a quadrilateral = 360 degrees.

Let the fourth angle be x:

Therefore: 60 + 95 + 150 + x = 360

305 + x = 360

x = 360 - 305

x = 55

Option B. I hope this helps.

6 0

3 years ago