−1⋅[(3−4⋅7)÷5]−2⋅24÷6
2 answers:
Answer:
-3
Step-by-step explanation:
A calculator is useful for this.
__
Inside parentheses, we evaluate the multiplication first.
−1⋅[(3−4⋅7)÷5]−2⋅24÷6
= −1⋅[(3−28)÷5]−2⋅24÷6
Then the addition inside parentheses.
= −1⋅[−25÷5]−2⋅24÷6
Now, we do the division inside parentheses.
= −1⋅[−5]−2⋅24÷6
Then we do the multiplication and division left to right.
= 5−48÷6
= 5−8
Finally, we do the sum.
= -3
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Answer:
Option C
The student's conclusion is correct because the solution to the system of equations and
is
Step-by-step explanation:
Let
x------> the cost of each burger
y-----> the cost of each sandwich
we know that
-----> equation A
----> equation B
Solve the system of equations
Multiply the equation B by
----->
------> equation C
Adds equation A and equation C
Substitute the value of x in the equation B
The solution of the system of equations is the point
so
The price of each burger is
The price of each sandwich is