Answer:
6. 6x-21=33+9x 7. -15x=-5(3x+7) 8. 16x-19=113-6x 9. -19x-34=56-x 10. -6(4x+3)=6(4x-3)?
6. 6x-21 = 33 +9x
+21 + 21
6x = 54 + 9x
-9x -9x
-3x = 54
/3 /3
x = -18
7. -15x = -5(3x+7)
First multiply the -5 to the other numbers.
-15x = -15x - 35
0x = -35
7 is impossible I believe.
8. 16x-19 = 113-6x
+6 +6
22x - 19 = 113
+ 19 +19
22x = 132
/22 /22
x = 6
9. -19x - 34 = 56 - x
+19x +19x
-34 = 56 + 18x
-56 -56
-90 = 18x
/18 /18
x = -5
10. -6(4x+3) = 6[4x-3]
-24x - 18 = 24x - 18
+18 +18
-24x= 24x
x = 0, since only zero can make the equation true.
The slope of this line is -2.
rise/run
rise = 4
run = -2
4
------- = -2
-2
Using the points (1,0) & (0,2)
2 - 0 2
----------- = ----- = -2
0 - 1 -1
- Sherry first took the multiplication instead of taking the sum of 16 and 9 first.
- The right expression is: 2* (16+9)
Step-by-step explanation:
Sherry's expression was:
(2*16)+9
Her expression was wrong because it is mentioned that twice the sum of 16 and 9 which means that first the sum has to be calculated then the sum will be multiplied by two.
So,
The right expression is: 2* (16+9)
Keywords: Word problems
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Do you have a picture of a graph?
Answer:
n = 1
Step-by-step explanation:
Due to it being compounded semiannually, the total amount after n years should be 2000[1+(.086/2)]^2n = 3178. (A = p(1+r/n)^nt)
Hence, solving this equation:
(1+0.43)^2n = 3178/2000
1.43^2n = 1.589
2n = 2
n = 1