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Alexeev081 [22]
3 years ago
15

A number decreased by negative 7 is the same thing as 48! what is the answer?

Mathematics
1 answer:
Lynna [10]3 years ago
6 0
X-7=48 it's quite as simple as that
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When you factor the equation you get:

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Can someone please help? This is due soon and I have no clue how to do it. Can someone please explain how to do this?
riadik2000 [5.3K]

9514 1404 393

Answer:

  y = 27

Step-by-step explanation:

The altitude of a right triangle creates two <em>triangles that are each similar to each other and to the larger right triangle</em>. This means corresponding sides are proportional.

If we write the proportion for the legs, we get ...

  (long leg) / (short leg) = y/18 = 18/12

Multiplying by 18 gives us ...

  y = 18(18/12)

  y = 27

_____

<em>Additional comment</em>

The leg/leg proportion above gave rise to the relation ...

  altitude² = (left hypotenuse segment)×(right hypotenuse segment)

That is, the altitude is the <em>geometric mean</em> of the two hypotenuse segments it touches. 18 = √(12y)

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There are two other "geometric mean" relationships in this triangle.

  • The upper left side is the geometric mean of the left hypotenuse segment and the whole hypotenuse (the two segments it touches at the bottom).
  • The upper right side is the geometric mean of the right hypotenuse segment and the whole hypotenuse (the two segments it touches at the bottom).

Each of these relationships is ultimately derived from the fact that all of the triangles are similar. You really only need to remember that these triangles are all similar and corresponding sides of similar triangles are proportional. (In some cases, it can be a bit of a shortcut if you remember the geometric mean relations.)

3 0
3 years ago
Of 1936 people so came into a blood bank to give blood, 200 people had high blood pressure. Estimate the probability that the ne
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Answer:

person has a 10% chance of having high bp

Step-by-step explanation:

200 out of 1936 equals about 10%

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Is this a reduction or enlargement?
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3 years ago
Matthew is making a sequence in which -3 is added to each successive term. The 6th term in his sequence is -1. What is the 1st t
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Answer:

The first term is 14.

Step-by-step explanation:

The general formula for this kind of sequence (arithmetic) is a(n) = a(1) + (n-1)c, where c is the common difference.  Here, we have a(6) = -1 = a(1) + (6-1)(-3), or -1 +15 = a(1).  The first term is 14.



3 0
3 years ago
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