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bezimeni [28]
3 years ago
6

Use elimination to solve: NN+ND=50 5NN+10ND=450

Mathematics
1 answer:
Tomtit [17]3 years ago
7 0
5NN+10ND=450\\5(NN+2ND)=450 \\ NN+2ND=90 \\ \\ \boxed{NN=90-2ND} \\ \\  NN+ND=50 =>\boxed{NN=50-ND} \\ \\ \\ 90-2ND=50-ND \\ -2ND+ND=50-90 \\ -ND=-40 \\ \\ \boxed{ND=40} \\ \\ NN=50-ND \\ NN=50-40 \\ \\ \boxed{NN=10}
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A tow truck charges a service fee of $50 and an additional fee of $1.75 per mile. What distance was Marcos's car towed if he rec
Solnce55 [7]
Well since the service fee is $50 that would be subtracted from the bill of $71. So what you would have left is $21 if you 1.75*12=21 so your answer would be 12miles hope I helped!
6 0
4 years ago
What is the greatest common factor of 24 60 and 72
lara31 [8.8K]
Greatest Common Factor - GCF

Factors of 24: 1; 2; 3; 4; 6; 8; 12; 24
Factors of 60: 1; 2; 3; 4; 5; 6; 10; 12; 15; 20; 30; 60
Factors of 72: 1; 2; 3; 4; 6; 8; 9; 12; 18; 23; 24; 36; 72

<span>GCF(24; 60; 72) = 12

</span>other method

24|2    60|2  72|2
12|2     30|2  36|2
  6|2     15|3   18|2
  3|3      5|5     9|3
   1|         1|       3|3
                        1|

GCF(24; 60; 72) = 2 · 2 · 3 = 12
8 0
3 years ago
What is 4x-2y=8 and y=2x+1 using substitution
Setler [38]

Answer:

No Solution

Step-by-step explanation:

4x-2y=8

y=2x+1

Make the first equation into where it says y=.

-2y=-4x+8

y=2x-4

Substitute either equation into the other as y=.

2x+1=2x-4   or    2x-4=2x+1

Switch terms around so they're with their like terms. Make sure it becomes the opposite when switching.

2x-2x=-1-4    or    2x-2x=4+1

0=-5                     0=5

Since x did not come back to equal an answer, this problem is not workable. There is no solution to it. If you were to do it a different way, there still would not be a solution to it.

8 0
3 years ago
what equation would represent the same linear relationship for the points (40,80) (80,115) (120,140) (160,165)
tiny-mole [99]
You can use the formula y1-y2=m(x1-x2)

to find m, you just do (y2-y1)/(x2-x1) so....

(115-80)/(80-40)= 35/40= 7/8

then plug it into the point slope equation:

y-115=7/8(x-80)

y-115=7/8x-70
y= 7/8 x + 45
5 0
3 years ago
Read 2 more answers
Choose which lines are perpendicular. after doing the necessary work, circle your final answer.
Burka [1]
First, we determine the slope of the line given,                    y = 2x + 5
The equation is in slope-intercept where in the slope of the line is the numerical coefficient of x. The slope is therefore 2.
The equation of the new line becomes,
          y - 6 = 2(x - 4)
Simplifying,            y = 2x - 2
5 0
3 years ago
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