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lions [1.4K]
3 years ago
8

Solve each system of equations 1.) 2x- 5y = 7 3x - y = -9

Mathematics
2 answers:
lozanna [386]3 years ago
7 0

Answer:

x = -4, y = -3

Step-by-step explanation:

Elis [28]3 years ago
4 0
X = -4 y= -3
Explanation: hope this helps

* please mark Brainliest
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HELP PLEASE ASAP IM ON THE LAST ONE
inna [77]

Answer:

y=9; z=16

Step-by-step explanation:

7 0
3 years ago
Sarah was cutting fabric for a quilt. She cut a strip of fabric that was 19 1/8 inches long into 5 equal pieces. When she was fi
goldenfox [79]
We need a least common denominator
19 1/8 and 2 1/4 (also = to 2 2/8)
19 1/8-2 2/8= 16 7/8
16 7/8 divided by 5
ANSWER: 3 3/8 in

3 0
4 years ago
Pls help me with this problem
Ugo [173]
Gimme a better picture
7 0
3 years ago
The points(0,2) and (4,-10) lie on the same line and the points (-5,-3) and (2,11) lie on another line. Determine by graphing wh
joja [24]
You are asked to do this problem by graphing, which would be hard to do over the Internet unless you can do your drawing on paper and share the resulting image by uploading it to Brainly.

If this were homework or a test, you'd get full credit only if you follow the directions given.

If <span>The points(0,2) and (4,-10) lie on the same line, their slope is m = (2+10)/(-4), or   m =-3.  Thus, the equation of this line is y-2 = -3x, or y = -3x + 2.

If </span><span>points (-5,-3) and (2,11) lie on another line, the slope of this line is:

m = 14/7 = 2.  Thus, the equation of the line is y-11 = 2(x-2), or y = 11+2x -4, or y = 2x + 7.

Where do the 2 lines intersect?  Set the 2 equations equal to one another and solve for x:

</span>y = -3x + 2 = y = 2x + 7.  Then 5x = 5, and x=1.

Subst. 1 for x in y = 2x + 7, we get y = 2(1) + 7 = 9.

That results in the point of intersection (2,9).

Doing this problem by graphing, on a calculator, produces a different result:  (-1,5), which matches D.

I'd suggest you find and graph both lines yourself to verify this.  If you want, see whether you can find the mistake in my calculations.

3 0
3 years ago
An array has a total of 40 circles. Each row has 5 circles. How many rows are in the array?
Svetllana [295]

Answer:

The answer is 8 rows.

Step-by-step explanation:

It is given that each row contain only 5 circles and there are 40 circles in the array. In order to find the numbers of row, you have to divide the total of circle by the number of circle in each row :

total = 40 circle

each row = 5 circle

5 circles = 1 row

40 circles = x row

x = 40/5

= 8 rows

5 0
3 years ago
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