This is quadratic equations Help asap!!

Mathematics

1 answer:

lord [1]2 years ago

3 0

Answer:

x = - 3 ± $\sqrt{2}$

Step-by-step explanation:

x² + 6x + 7 = 0 ( subtract 7 from both sides )

x² + 6x = - 7

using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(3)x + 9 = - 7 + 9

(x + 3)² = 2 ( take square root of both sides )

x + 3 = ± $\sqrt{2}$ ( subtract 3 from both sides )

x = - 3 ± $\sqrt{2}$

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I just need a little help

iris [78.8K]

Answer:

your answer should be 2 and 1/4ths

Step-by-step explanation

2 and 1/4ths bc 5 is more than 4 and there is already a whole so there for there are going to be 2 wholes then there are still parts left over and its out of 4 and there is only one left over so there for it would be 1/4ths.

7 0

3 years ago

colleen rolls a number cube and flips a coin. What is the probabilty that she will roll at least a 3 or flip heads

anyanavicka [17]

The probability of her rolling at least a 3 and flipping heads is 4/12 or 33 1/3 %.

4/6 * 1/2 = 4/12= 1/3 =0.3333333 = 33 1/3% or 33.33333%

I hope this helps!!

6 0

3 years ago

2) Find the point, M, that is five-sixths of the distance from A(-7, 2) to B(-1, -4).

JulsSmile [24]

We have that
point A(-7,2) and point B(-1,-4)

Step 1
find the distance AB
d=√[(-4-2)²+(-1+7)²]------------> √[36+36]
d=√72

step 2
find the point M
five-sixths of the distance from AB----------> (5/6)*√72

see the attached figure
AC/AB=x/((5/6)*AB)
6/(AB)=x/((5/6)*AB)--------> 6=6x/5
x=30/6-------> x=5

CB/AB=y/((5/6)*AB)
6/AB=y/((5/6)*AB)---------> 6=6y/5
y=30/6-------> y=5

therefore
the coordinate x of point M is
A(-7,2)
Mx=-7+5=-2

the coordinate y of point M is
A(-7,2)
My=2-5=-3

the point M is (-2,-3)