Answer:
75 cm
Step-by-step explanation:
I used the formula and my calculator. Hope this helps! if you are still confused please comment!
–x + y = –3 (a)
3x + 2y = 9 (b)
Lt's eliminate y , by multiplying a) by -2
-2(–x + y) = -2(–3) → +2x - 2y = +6 (c). Now add (c) to (b)
+2x - 2y = +6 (c).
3x + 2y = 9 (b)
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5x + 0 = 15 and x = 15/5 and x = 3
To find y, plugin the value of x in any of the equation, sat (a):
–x + y = –3 (a) → -3 + y = -3; y = -3+3 → y = 0
So the solution is (3,0) Answer C
Option B 6x-7y = -11 is correct
Step-by-step explanation:
We need to write the equation of the given line in standard form.
The points are (1/2,2) and (3,1)
The equation used is:
where m is the slope.
Finding slope :
x₁= 1/2, y₁=2, x₂=-3, y₂=-1
Putting values:
Now taking point (1/2,2) and s;ope m = 6/7 finding equation:
So, Option B 6x-7y=-11 is correct
Keywords: Standard form of equation
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6/y=9/5(due to similarity)
y=6*5/9=30/9=10/3=3.333..
Given:
The two numbers are 6788678 and 1234567 .
To find:
The numbers that must be taken away from the sum of 6788678 and 1234567 to make it equal to the difference of the given numbers.
Solution:
Let x be the required number.
Sum of given numbers is:
Difference of the given number is:
The number x is taken away from the sum of 6788678 and 1234567 to make it equal to the difference of the given numbers.
Therefore, the required unknown number is 2469134.