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skelet666 [1.2K]
3 years ago
12

Evaluate 4x-7 when x=5

Mathematics
2 answers:
Anna007 [38]3 years ago
4 0
The answer is 13.

You can evaluate this by substituting x for 5 in the expression.

4x-7
4(5)-7
20-7
13
xz_007 [3.2K]3 years ago
4 0
Since x=5, we will make the problem into 4(5)-7. Following the order of operations, we need to multiply first. 4*5=20. Then we have 20-7, which is equal to 13. I hope this helps you!

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Answer:

w = l + \frac{25 - l^{2}}{l - 5}

(Anyone can correct me if I'm wrong)

Step-by-step explanation:

Before we start the solving, we can make the following statements:

Area = l x w

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therefore,

l x w = 5x + 25

Since the question states that the length is x more than the width, so we can make the following statement:

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From this, we can find w by substituting it in the statement we made earlier, w = l + x,

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