Using a system of equations, it is found that a soft taco costs $1 and a burrito costs $3.
<h3>What is a system of equations?</h3>
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the variables are:
- Variable x: Cost of a soft taco.
- Variable y: Cost of a burrito.
You order four soft tacos and three burritos and your total bill is $15, hence:
Your friend's bill is $9 for two soft tacos and two burritos, hence:
Hence, replacing on the first equation:
Hence, a soft taco costs $1 and a burrito costs $3.
To learn more about system of equations, you can take a look at brainly.com/question/14183076
Step-by-step explanation:
I'll call the boxes at the bottom 1 through 6 from left to right.
1. The lines intersect
Answer: 2, 6
2. The lines are parallel
Answer: 3, 4
3. There is only one line
Answer: 1, 5
Divide each term in
3x=27 by 3.3x3=27/3
Reduce the expression by cancelling the common factors.
Cancel the common factor.
3x3=27/3
Divide
x by 1.x =27 /3
Divide
27 by 3.x=9
Divide each term by 3 and simplify. hope this helps :)
Using the concept of standard deviation, it is found that the standard deviation of the data-set will remain the same.
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- The mean of a data-set is given by the <u>sum of it's observations, divided by the number of observations</u>.
- The standard deviation is given by the <u>square root of the sum of the differences squared of each observation and the mean, divided by the one less than the number of values</u>.
- If all observations are increased by a value x, the mean will also increase by x.
- In the standard deviation, at the sum of the differences squared of each observation and the mean, each observation is increased by x, as is the mean, thus, the sum stays the same, while the standard deviation also stays the same.
A similar problem is given at brainly.com/question/18342323
Answer: add 0.3 to both sides
Step-by-step explanation:
1) combine like terms
ALWAYS eliminate constant (number with no variable) Before variable
2) when eliminating constant use the opposite sign, ex: x-5, use +5 to eliminate -5
3) eliminate variable by dividing on both sides
Hope this helps!