The answer is c
x^2 = 49
x = √49
√49 = ±7
Answer:
4 hours
Step-by-step explanation:
- Step One: Define Variables -
Let x be the # of hours spent using the vehicles
- Step Two: Make Equations -
Jose: 4 + 2.5x
Elaine: 10 + x
If they spend the same amount then that means:
Elaine's price = Jose's price, therefore:
4 + 2.5x = 10 + x
1.5x = 6
x = 4
At 4 hours, both prices are the same.
B intersect C = {6}
A intersect {6} = { }
The empty set
Letter C
Good job, you got the equations! XD
I'll just help you solve
Multiply the 2nd row by 9
<span>9x+9y=117</span>
<span><span><span>9x+27y=207
</span></span></span>Subtract the 2nd row from the 1st row
<span><span><span>−18y=−90
</span></span></span>Divide both sides by <span>−18</span>
<span><span><span>y=<span><span>−90/</span><span>−18
</span></span></span></span>Two negatives make a positive
<span><span>y=<span><span>90/</span><span>18</span></span></span><span></span></span><span>
y = 5
Substitute 5 into an equation
9x+9(5)=11<span>7
</span>9x+45=11<span>7
</span>Subtract <span>45</span> from both sides
<span><span><span>9x=117−45
</span></span></span>9x=7<span>2
</span>Divide both sides by <span><span>9</span></span>
x = ___
Hope this will help</span></span>
Answer:
2 3/4
Step-by-step explanation:
this is the answer
