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Digiron [165]
3 years ago
7

Help ???????????????????????

Mathematics
1 answer:
Likurg_2 [28]3 years ago
5 0

Answer:

I dont remember how to do this but i wish you luck, try searching on khan academy for how to do this ;)

Step-by-step explanation:

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1. Which would be a more helpful for solving the system: adding the two equations or subtracting
ira [324]

Answer:

1) Subtracting one from the other

2) x = 0.375 and y = 0.125

Step-by-step explanation:

Equation 1 :

\frac{2x+1}{2y}=7\\\\

Equation 2:

\frac{6x-1}{2y}=5

To solve these equations by the Elimination method we multiply equation 1 with 6 and multiply equation 2 with 2 so now,

\frac{2x+1}{2y} =7\\\\2x+1=14y\\\\Multiplying\ Equation\ 1\  with\ 6\\\\12x+6=84y

Now for the second equation:

\frac{6x-1}{2y}=5\\\\6x-1=10y\\\\Multiplying\ equation\ 2\ with\ 2 \\\\12x-2=20y

Now subtracting equation 2 from equation 1

12x+6=84y\\\\12x-2=20y\\\\Subtracting\ leads\ to\\12x-12x+6-(-2)=84y-20y\\0+8=64y\\8=64y\\8/64=y\\0.125=y

now insert this value of y into any equation

lets insert it into equation 1

\frac{2x+1}{2y} =7\\\\2x+1=14y\\2x+1=14(0.125)\\2x+1=1.75\\2x=1.75-1\\2x=0.75\\x=0.75/2\\x-0.375

5 0
3 years ago
about 0.4 of a biology class will be going on a field trip. Express the decimal as a fraction in simplest form.
Illusion [34]
I believe you could also write 0.4 as 4/10
4 0
4 years ago
Read 2 more answers
Heeeeeeeeeeeeeeeeeeeelllllppp​
adoni [48]

Answer:

120 degrees.

Step-by-step explanation:

All the angles in a triangle add up to 180. You have two of the angles given:

50 degrees and 70 degrees

To find the third angle of the triangle (BAC), use the expression:

180 - (50 + 70)

180 - 120

60

So, the third angle in the triangle is 60 degrees. Looking at angle DAB, you can see that it forms a straight line with angle BAC. A straight line is 180 degrees. Since we know BAC is 60, and BAC + DAB = 180, by doing 180 - 60, you can see that angle DAB is 120 degrees.

7 0
3 years ago
Find factors of 15y^2-50y+35=
bazaltina [42]
First, factor out the common factor 5.

<span>15y^2-50y+35 =

= 5(3y^2 - 10y + 7)

Now we need to factor the trinomial.
3 can be factored as 3 * 1
7 can be factored as 1 * 7 or (-1) * (-7)
Since the middle term is negative, we need to use -1 and -7 as the factors of 7

= 5(3y - 7)(y - 1)
</span>
5 0
4 years ago
Read 2 more answers
What is the equation of a line that passes through the point (6, 1) and is perpendicular to the line whose equation is y=−2x−6y=
Mandarinka [93]
Lets get the negative reciprocal of the slope so we get
m  =  \frac{1}{2}
Now the equation that is perpendicular is
y =  \frac{1}{2} x + b
Lets solve for b by plugging in the point (x,y)=(6,1)
1 =  \frac{1}{2} (6) + b \\ 1 = 3 + b \\ 1 - 3 = b \\ b =  - 2
Now plug that into the equation. So the equation of the line that is perpendicular and
passes through the point (6, 1) is
y =  \frac{1}{2} x  - 2
6 0
3 years ago
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