Answer:
Just plug in the numbers.
Step-by-step explanation:
Answer:
B. 10
Step-by-step explanation:
To find the answer we would plug each given number into x to see if it makes the equation true
<em>A. 2(5) = 20 </em>
<em> 10 </em>
<em> 20</em>
<em>B. 2(10) = 20</em>
<em> 20 = 20</em>
<em>C. 2(20) = 20</em>
<em> 40 </em>
<em>20</em>
As you can see, the only answer that makes the equation 2x=20 true, is answer B
Zac's age=x
Chris's age=5x
After 30 years
Zac's age=x+30
Chris's age =5x+30=2(x+30)
5x+30=2x+60
5x-2x=60-30
3x=30
x=10
Answer:
about 300
21200 rounded is 21000 and 6575 rounded is 7000
Step-by-step explanation:
21000÷7000=300
Answer:
k=11
Step-by-step explanation:
3(k - 6) = 15
Divide each side by 3
3/3(k - 6) = 15/3
k - 6 = 5
Add 6 to each side
k-6+6 = 5+6
k = 11