Please help!? 5 Stars! :0 :(
Answers
OK. These problems are easy if you know the quadratic formula,
and they're impossible if you don't.
Here's the quadratic formula:
When the equation is in the form of Ax² + Bx + C = 0
then x = [ -B plus or minus √(B²-4AC) ] / 2A
I'm sure that formula is in your text or your study notes,
right before these questions. You should cut it out or
copy it, and tape it inside the cover of your notebook.
Then, you'll always have it when you need it, until
you have it memorized and can rattle it off.
The first question says 3x² + 5x + 2 = 0
Is this in the form of Ax² + Bx + C = 0 ?
Yes ! A=3 B=5 C=2
so you can use the quadratic formula to solve it.
x = [ -B plus or minus √(B²-4AC) ] / 2A
= [ -5 plus or minus √(5² - 4·3·2) ] / 2·3
= [ -5 plus or minus √(25 - 24) ] / 6
= [ -5 plus or minus √1 ] / 6
x = -4 / 6 = -2/3
and
x = -6 / 6 = -1 .
_______________________________________
The second question says
4x² + 5x - 1 = 0
Is this in the form of Ax² + Bx + C = 0 ?
Yes it is ! A=4 B=5 C= -1
so you can use the quadratic formula to solve it.
x = [ -B plus or minus √(B²-4AC) ] / 2A
Now, you take it from here.
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HELP PLEASEA bucket hold holds 10 white golf balls, 3 pink golf balls, and 5 yellow golf balls. Jason selects 1 golf ball from the bucket at random.What is the probability that the golf ball he selects is white or pink?A.5/54B.13/5C.5/13D.13/18
What is the difference between 9squere unit and 9 cubic units
Answers
b.(3 + 6w)2
c.6(1 + 2w)
d.-1(-12w - 6)
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Answer:
A is the answer!!!
Step-by-step explanation:
Have a good day Piccola!!!!
-leeknowishawt
Answers
The area of the irregular polygon in the sketch is: D. 40.5 cm².
What is the Area of an Irregular Polygon?
To find the area of an irregular polygon, decompose the polygon into known shapes. Find the area of each shape and add all together.
Thus:
The irregular polygon is made up of a rectangle and a triangle.
Area of the irregular polygon = area of rectangle + area of triangle.
= length × width + 1/2(base × height)
Length = 12.5 cm
Width = 3 cm
Base = 3 cm
Height = 2 cm
Area of the irregular polygon = 12.5 × 3 + 1/2(3 × 2)
= 40.5 cm²
Learn more about area of irregular polygon on:
Answer:
The answer is 40.5 (D)
X y. X y
0 3. -1 1
1. 5. -2-1
Line 1:y=____x+____
Line 2:y=____x+____
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Line 1:
Line 2:
-20 = 5
___ x
6
x = ? (You have to put what "x" equals)
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5/6x=-20
5x=20 multiplied by 6
5x=120
x=120 divided by 5
x=24
This is how you solve your equation;
-20 = 5/6x
-20 ÷ (-5/6) = x (did the inverse operation of x)
-24 = x or x = -24
to check the answer just substitute the value of x in the equation;
-20 = 5/6x
-20 = 5/6(-24)
-20 = -20
hope that helps:D
Answers
7 x
_ _ = 700/8 = 87.5 (100-87.5 = 12.5 is the missing value.
8 100