Answer:
x = 6
Step-by-step explanation:
Using the balancing-equations method, you can solve this problem:
2x + 5 = 17
- 5 - 5
---- ----
2x = 12
---- ----
2 2
x = 6
Let C be the amount of compost
T be the amount of topsoil
Each compost cost = $25
Cost of C compost = 25C
Each topsoil cost = $15
Cost of T topsoil = 15T
Amount of compost + amount of topsoil = 10
C + T = 10 -------> Equation 1
cost of C compost + cost of T topsoil = 180
25C + 15T = 180 --------> equation 2
Solve the first equation for C
C + T = 10
C = 10 - T
Now plug it in second equation
25C + 15T = 180
25 ( 10 - T) +15T = 180
250 - 25T + 15T = 180 (combine like terms)
250 - 10 T = 180 (Subtract 250 on both sides)
-10T = 180 - 250
-10T = -70 ( divide by -10 on both sides)
T = 7
She purchased 7 cubic yards of topsoil .
Answer:
-7 > x
Step-by-step explanation:
first we expand the brackets so it will be -3x -6>-69-12x
then we can convert the > to = so it will be :
-3x -6=-69-12x
we can now try to solve the equation for x so :
-3x -6= -69-12x
-6 = -69-9x
63 =-9x
7 = -x
-7 = x
we can then change the symbols back so it will be:
-7 > x
Answer:
129792
Step-by-step explanation:
156
× 832
----------
312
468
+ 1248
---------------
129792
the slope intercept form would be y
=
4
/5
x-4
