The answer you are looking for is (1, -8)
remember that: x=[(-b/2a)]
and that the problem is set up as y=ax^2+bx+c
calculate:
x=[-8/2(-4)]
x=[-8/-8]
x=1
then:
y=(-4)*1^2+(8*1)-12
y=(-4)+8-12
y=(-4)+8-12
y=4-12
y=(-8)
(1, -8)
Note
Tangents from an external point to a circle's circumference are equal.
So
WZ = WX
WZ = 5a + 12
WX = 7a + 5
7a + 5 = 5a + 12 Subtract 5 from both sides.
7a = 5a + 12 - 5
7a = 5a + 7 Subtract 5a from both sides.
7a - 5a = 7
2a = 7 Divide by 2
a = 7/2
a = 3.5
Answer:
Step-by-step explanation:
1 foot = 12 inches
12 inches/ 48 inches = 1/4 foot
or 1 foot/4 feet = 1/4 foot
Total number of peaches = 15
Percentage of blank peaches out of the total peaches = 75%
Then
Number of blank peaches out of the total peaches = (75/100) * 15
= (3/4) * 15
= 45/4
= 11 1/4
So 11 1/4 peaches are blank. If you do not want to include the fraction part of the answer, then you can take either 11 or 12 peaches to be blank as well. I hope the procedure is clear enough for you to understand. You can definitely use this simple but effective method for solving similar kind of problems in future.
C = 2πr
C = 2(3.14)(2.5)
C = 15.7 = 16 cm is your answer.
282.6 m = πD
282.6 m = (3.14)D
282.6 m/3.14 = 3.14/3.14 x D
90 m = D
90 meters is the diameter.
hope this helps you!!!