Step-by-step explanation:
A linear equation in two variables can be described as a linear relationship between x and y, that is, two variables in which the value of one of them (usually y) depends on the value of the other one (usually x). In this case, x is the independent variable, and y depends on it, so y is called the dependent variable
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
0, 6, and 6? kind of a confusing question.
Answer:
-4a^2+5a-1
not a binomial but a trinomial/quadratic equation
Step-by-step explanation:
order of operation
Step 1: Commutative property
-4a^2+<u>4a+a</u>-1
Step 2: combine like terms
-4a^2+5a-1
