Answer:
x = 270 gallons
270 gallons of a 50% antifreeze solution must be mixed with 90 gallons of 10% antifreeze to get a mixture that is 40% antifreeze
Step-by-step explanation:
Let x represent the number of gallons of the 50% antifreeze solution.
The volume of the 10% antifreeze is = 90 gallons
The volume of the mixture that is 40% antifreeze = 90+x
The amount of antifreeze in the two solutions must be equal to the amount of anti freeze in the mixture;
50% of x + 10% of 90 = 40% of (90+x)
0.50(x) + 0.10(90) = 0.40(90+x)
0.50x + 9 = 36 + 0.40x
Collecting the like terms;
0.50x - 0.40x = 36-9
0.10x = 27
x = 27/0.10
x = 270 gallons
270 gallons of a 50% antifreeze solution must be mixed with 90 gallons of 10% antifreeze to get a mixture that is 40% antifreeze
Answer:
B. f and g are reflections of each other about the x-axis.
Step-by-step explanation:
I calculated it logically
Answer:
The formal operational stage.
Step-by-step explanation:
According to Piaget, adolescents have entered the final stage of cognitive development. The <u>formal operational</u> stage enables adolescents to think logically about tangible and abstract ideas.
As per Piaget: there are four stages of cognitive development.
- The Sensorimeter Stage.
- The Preoperational Stage.
- The Concrete operational Stage.
- The formal operational stage.
The Sensorimeter Stage: It is a stage of age between 0-2 years, wherein kids start using senses of touch, watching and listening to understand and feel the world around.
The Preoperational Stage: It is a stage of age between 2-7 years, wherein kids develop language and start talking about things.
The concrete operational Stage: It is a stage of age between 7-11 years, wherein kids learn logical concrete rule and start having conversation.
The formal operational stage: It is the stage of age group of 11 and above. At this stage children start thinking logically about tangible and abstract ideas.
Answer:
3429216
Step-by-step explanation:
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