Evaluate c-2 when c=7

Mathematics

2 answers:

Luba_88 [7]3 years ago

8 0

5 is the answer. Hope this helps.

zhannawk [14.2K]3 years ago

8 0

Answer:

The value of the expression c-2 when c=7 is 5.

Step-by-step explanation:

Consider the provided expression.

We need to find the value of expression for c=7.

Substitute the value of c=7 in the provided expression and simplify as shown.

$c-2$

$7-2$

Subtract the numbers as shown:

$5$

Hence, the value of the expression c-2 when c=7 is 5.

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Step-by-step explanation:

1. You must make a system of equations:

$\left \{ {{x+y=24} \atop {120x+220y=3780}} \right.$

Where $x$ is the number on months he lived in Germany and $y$ is the number on months he lived in Holland.

2. You can solve this system of equations by using the Elimination Method. If you multiply the first equation by -120, you can cancel the variable $x$ when you add both equations, and then you can calculate $y$ . When you obtain the value of $y$ , you can substitute it into one of the original equations and solve for $x$ . Then:

$\left \{ {{-120x-120=-2880} \atop {120x+220y=3780}} \right.$