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viva [34]
3 years ago
15

Solve 8m^2+20m=12 for m by factoring.

Mathematics
2 answers:
Anarel [89]3 years ago
7 0
First, off, divide both sides by 4 to make things easier
2m^2+5m=3
minus 3 both sides
2m^2+5m-3=0
factor
hmm
experiment
(2m-3)(m+1), nope
(2m+3)(m-1), nope
(2m-1)(m+3), yep

(2m-1)(m+3)=0
set each to zero
2m-1=0
2m=1
m=1/2

m+3=0
m=-3

m=1/2 or -3
pickupchik [31]3 years ago
5 0
This is an equation?

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Help me please I don’t wanna fair math
vladimir1956 [14]

Step-by-step explanation:

To find the equation you must first find the gradient and also look for the points on the graph.

I see point ( 0, 2) and point (4, 1)

Hence first find the gradient before equation

the gradient = y2-y1/x2-x1

y2 = 1

y1 = 2

x2 = 4

X1 =0

if you put in the values it will look like

1-2/4-0

-1/4

the gradient = -1/4

So for the equation the formula is

remember m is the gradient

y - y1 = m ( x - x1 )

so put in the value from only one point so you can choose either (0,2 ) or (4,1 )

I will go with (4, 1)

y - y1 = m ( x - x1 )

y - 1 = m ( x - 4 )

y -1 = -1/4 ( x - 4)

4 ( y-1) = -1(x-4)

4y- 4 = -1x +4

4y - 4 -4 = -1x

4y -8= -1x

4y + 1x -8 = 0

this is the equation.

thanks and good luck.

6 0
3 years ago
Simplify the expression:<br> (1 + 6g)(3) =
Irina18 [472]

Answer:

3 + 18g

Step-by-step explanation:

(1+6g)(3)=

Begin by distributing the 3 to each of the terms, I like to re-write it like this before distributing to make sure I remember to multiply all the terms inside the parenthesis.

(3)(1+6g)

3 + 18g

Since we are just simplifying the problem and not solving it, you won't have a number for your answer. It's usually a smaller equation with at least one variable :)

7 0
3 years ago
Wesley does this work to find the decimal equivalent of 2399. What does his work tell you about the decimal equivalent?
MrMuchimi

answer is 2399

so yeah mhm yeah u d   u    m    b

6 0
2 years ago
Read 2 more answers
A university council wants to determine the need for a new staff room. The council conducted a survey of the staff by randomly s
iogann1982 [59]

Answer:

As the sample size is appropriately large, the margin of error is 0.026

Step-by-step explanation:

7 0
3 years ago
Which equation represents a circle with a center at (-4,9) and a diameter of 10 units?
Dennis_Churaev [7]

Answer:

(x+4)^2 + (y-9)^2 = 25

Step-by-step explanation:

To write the equation of a circle, use the formula (x-h)^2+(y-k)^2 = r^2 where the center of the circle is (h, k).

This means the equation is (x--4)^2 + (y-9)^2 = r^2\\\(x+4)^2 + (y-9)^2 = r^2.

Find the radius r by dividing the diameter of 10 in 2. The radius is 5.

So the equation of the circle is (x+4)^2 + (y-9)^2 = 25

7 0
3 years ago
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