<u><em>Answer: A. -14. x=-14 and -14=x. *The answer should be the negative sign.*</em></u>
Step-by-step explanation:
subtraction property of equality is subtracting the same number from both sides of an equation does not change the equation.
switch sides of an equation.
x+19=5
subtract by 19 both sides of an equation.
x+19-19=5-19
simplify.
19-5=14
x=-14 and -14=x
Hope this helps!
Thanks!
Have a great day!
This is a simultaneous question.
To solve this, we have to make up 2 equations based on the info provided like so:
electricity = e
gas = g
600e + 100g = $412 ——(1)
400e + 150g = $293 ——(2)
In this case, it’ll be easier to use the elimination method where you eliminate a variable so you can calculate only one.
Here, we will be eliminating e so we can get the cost of gas.
To do this we need to get both equation’s e to 600, so we have to multiply equation 2 by 1.5:
(2) x 1.5:
400e + 150g = $293
600e + 225g = $439.50 ——(3)
Now we eliminate e by subtracting equation 1 from equation 3:
(3) - (1):
600e + 225g - 600e - 100g = $439.50 -$412
125g = $27.50
g = $0.22.
Therefore one unit of gas costs $0.22.
Hope it helps and have a good day ahead :D
Answer:
is 20
Step-by-step explanation:
hope this helps
Answer:
4. A study where subjects are given treatments and their responses are measured and recorded.
Step-by-step explanation:
The correct answer is - 4. A study where subjects are given treatments and their responses are measured and recorded.
Reason -
An EXPERIMENT is any activity with an observable result.
Here,
Responses are measured and then recorded.
