It should be 15% I think I’m right
Answer:
32
Step-by-step explanation:
Let the x ml of water be mixed with 237 ml of ammonia whose strength is 100%, in order to create a mixture of 75% strength.
The equation required to solve this will be:
237/(237+x)=75/100
solving for x we get:
237/(237+x)=3/4
237×4=3(237+x)
948=711+3x
3x+711=948
3x=948-711
3x=237
x=237/3
x=79 ml
therefore the amount of water to be added will be 79 ml
Answer:
6
Step-by-step explanation:
-(-3 x 2) = 6
you multiply the inside numbers and get -6 the other negative turns that into a positive
I cannot see the statements you are given as options, but if x = y, and y = z, you can write that as x = y = z, which means that x = z also.
I hope this helps!
