Answer:
40 km on the highway
30 km on the city roads
Step-by-step explanation:
Let x = highway
Let y = city road
The time formula: time = distance / speed.
1) Since we do not know the distance travelled on the highway and city roads but we do know the total time taken, we can say x + y = 70. Set the distances x and y and all equated to 2 hours, since we do not know them, nor do we know the time. This is called a system of equations.
x + y = 70
x/80 + y/20 = 2
2) Solve the system of equations using substitution.
x = 70 - y
---------------
70 - y/80 + y/20 = 2
70 + 3y/80 = 2
y = 30
---------------------------------
x + 30 = 70
x = 70 - 30
x = 40
Therefore, the delivery truck travelled 40 km on the highway and 30 km on the city roads.
I’m pretty sure the average rate of change is 1
Answer:
← SOLUTION →
OA OC
___ = _____
OB OD
→ 2x + 4
_______
9x - 21
= 2x -1
<h3>______. ( GIVEN ) </h3>
3
= 3(2x+4)
= (9x - 21) ( 2x -1)
= 6x+12
= 18x² -51 x +21
<h3>= 0</h3>
= 6x² - 19x +3.
= 0
= 6x² -18 x- x +3
<h3>= 0 </h3>
→ 6x ( x-3) - (x - 3)
<h3>= 0 </h3>
→ ( x - 3 ) (6x - 1 )
<h3>= 0 </h3>
<h3>x = 3. or x = 1 </h3>
__
6
[ but 2x-1 = {2 × 1
__ - 1 } < 0
. 6
= x= 3
or
x= 1
___
6
<u>SO </u><u>THE </u><u>VALUE</u><u> OF</u><u> </u><u>X </u><u> </u><u>IS </u><u>=</u><u> </u><u>3</u><u> </u><u>or </u><u>1</u><u>/</u><u>6</u>
<u> </u><u> </u><u> </u><u> </u><u> </u><u>X </u><u>=</u><u> </u><u>3</u>
<u>hope</u><u> it's</u><u> helpful</u><u> to</u><u> </u><u>you </u><u>good</u><u> </u><u>luck</u><u> </u><u>for </u><u>study</u>
Answer:
1921979
Step-by-step explanation:
just write it out and solve or use a calculator
;D hope this helps
Answer:
= 16
Step-by-step explanation:
