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Serga [27]
4 years ago
13

1. Solve the system.

Mathematics
1 answer:
Sliva [168]4 years ago
8 0

Answer:

D

Step-by-step explanation:

We put 2nd equation into 1st equation and get y:

y=\frac{1}{7}x-4\\y=\frac{1}{7}(7y+1)-4\\y=y+\frac{1}{7}-4\\y=y-\frac{15}{4}\\NOTHING

We can't seem to come to a solution.

Also let's rearrange the 2nd equation into y = something form:

x = 7y + 1

7y = x - 1

y = 1/7 x -1

As we can see BOTH the lines have the same SLOPE, the number before x, which is 1/7 and we know that lines with same slope are parallel, they never intersect.

Having a solution to a system means their intersection point, since they are parallel lines, they don't intersect, and hence DO NOT HAVE A SOLUTION.

D is the correct choice.

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Simplify this question
Lera25 [3.4K]

Answer:

decimal form: 1.88982236505

Hope This Helps!     Have A Nice Day!!

4 0
4 years ago
Use a separate sheet of paper to solve the system of inequalities by graphing. Use the graph to decide if the point (1, –1) is i
Lena [83]

Answer:

The answer is no though, the point (1,-1) is below both.

Step-by-step explanation:

So the two inequalities are y≤-3x+3 and 3x+8y≥3

With inequalities you have to know a few things.  First, when you graph you may have to use non solid lines.  for instance, if you had x<5, 5 would not be part of the answer because it is only answers less than 5.  so you represent this by making a dashed line that says "you cannot include values on this line".  Second, with algebra, if you multiply both sides by a negative it flips the inequality.  for instance -y > 54 you would multiply (or divide) by -1 and it would change to y < -54.  Third, when graphing an inequality, treat it like an equation and graph the line as if it were said equation(with solid or dashed lines as needed)  then, if it is y > f(x) you shade in the section above the line and y < f(x) shades in below.  The shaded part is your answer basically.  Now lets get into yours.

y≤-3x+3

It is already in the form y = f(x)  so grapht he line 3x + 3 with a solid line since it is y is less than or equal to,  then shade below that line.  

3x+8y≥3

First get it so y is by itself

3x+8y≥3

8y≥3 - 3x

y ≥ 3/8 - 3/8 x

Now grapht his line  with a solid line and shade the area above it.

Now, the shaded area below between y ≥ 3/8 - 3/8 x and  y≤-3x+3 and the lines are your answer, so you need to check if the point (1, -1) is in this shared shaded area or on one of the lines.

The answer is no though, the point (1,-1) is below both.

6 0
4 years ago
Show 713.65 in expanded notation
Nat2105 [25]

Answer:

713.65 = (7 x 100) + (1 x 10) + (3 x 1) + (6/10) + (5/100)

Step-by-step explanation:

5 0
3 years ago
I NEED HELPPPP
Anna007 [38]
I’m sorry this is all I can say! So she has 28 points. But what do we really have to record?
7 0
3 years ago
What equation represents a population of 490 animals that increases at an annual rate of 20%
Tpy6a [65]

490+0.20(490)=x

(hope I helped)

4 0
3 years ago
Read 2 more answers
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