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Free_Kalibri [48]
4 years ago
13

What is the solution to 21x+7y=42 −5x+5y=10 ​

Mathematics
2 answers:
abruzzese [7]4 years ago
7 0

Answer:

y=-3x+6

y=x+2

Step-by-step explanation:

Schach [20]4 years ago
5 0

Answer:is it a y intercept

Step-by-step explanation:

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a student found the slope of a line that passes through the points (1,14) and (3,4) to be 5. what mistake did she make?
mariarad [96]
x_{1}=1
x_{2}= 3
y_{1} =14
y_{2}=4
Slope= \frac{rise}{run} = \frac{ y_{2} - y_{1} }{ x_{2} - x_{1} } = \frac{4-14}{3-1} = \frac{-10}{2} =-5


answer: The student flipped the y values
3 0
3 years ago
1 1/4 subtracted from its reciprocal is :<br> A -9/20. B - 1/20. C 1/5. D - 1/5
dalvyx [7]

Answer:

Step-by-step explanation:

first we turn ur mixed number into an improper fraction

1 1/4 = 5/4

the reciprocal of 5/4 can be found by just flipping it....so the reciprocal is gonna be 4/5

so 1 1/4 subtracted from its reciprocal is :

4/5 - 5/4 =

16/20 - 25/20 =

- 9/20 <====

7 0
4 years ago
Read 2 more answers
the odometer in Mr Washington's car does not work correctly the odometer recorded 13.2 miles for his last trip to the hardware s
Nonamiya [84]
12 percent is the error.
3 0
4 years ago
Evaluate StartFraction 3 (6 minus 14) over negative 4 EndFraction.<br> -15<br> -6<br> -1<br> 6
11111nata11111 [884]

Answer:

6

Step-by-step explanation:

First you would do 6 minus 14 and end up with -8

Then you would do -8 times 3 which equals -24

Lastly you would do -24 divided by -4 and get 6

4 0
4 years ago
Read 2 more answers
A number, n, is multiplied by -5/8. The product is -0.4. What is the value of n?
Advocard [28]
The answer is D. 16/25

-5/8 = -0.625

-0.4 divided by -0.625 = 0.64

0.64= 16/25
5 0
3 years ago
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