Answer:
x = - 5
Step-by-step explanation:
Given
8 - 3x = 23 (subtract 8 from both sides )
- 3x = 15 ( divide both sides by - 3 )
x = - 5
A rational number is defined as a number that can be expressed in the form a/b where b≠0
the set of integers includes positive and negative counting numbers and 0
so like -4,-3,-2,-1,0,1,2,3,4.... etc
any integer can be written as the same integer over 1
some examples
-4=-4/1
3=3/1
100=100/1
etc
so yes, any integer can be expressed as a rational number
Solve for x in first equation:
x-2y=7
Add “2y” to both sides
x=2y+7
Put this in to second equation:
3(2y+7)+2y=21
Solve for y:
Distribute the 3 into the ()
6y+21+2y=21
Combine the like y terms
8y+21=21
Subtract 21 from both sides
8y=0
Divide by 8 on both sides
y=0
Put this into the first solved equation:
x=2(0)+7
Solve for x:
Multiple 2(0)
x=0+7
Add 0 and 7
x=7
So the value of x is positive 7.
D. Is the one which has slope -3
It is because the point of it’s slopes are
( 0,0) and (1,-3)
So the slope will be
(Y2 - Y1)/(X2-X1)
Hence -3 is the slope of graph D.
Answer:
250
Step-by-step explanation:
If 15 is 6% multiplying it by 16.66666666666667 will make it 100%
15 x 16.66666666666667 = 250
Another way to do this is divide by 6 and multiply by 100