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creativ13 [48]
2 years ago
15

Please help me, I don't know how to do this...

Mathematics
1 answer:
Lunna [17]2 years ago
8 0

Answer:

  A.  5

Step-by-step explanation:

The triangle will be a right triangle when the side lengths satisfy the Pythagorean theorem: the sum of the squares of the legs is equal to the square of the hypotenuse.

  (x +1)^2 +x^2 = (√61)^2

  x^2 +2x +1 +x^2 = 61 . . . eliminate parentheses

  2x^2 +2x = 60 . . . . . . .subtract 1, collect terms

  x^2 +x -30 = 0 . . . . . divide by 2, subtract 30

  (x +6)(x -5) = 0 . . . . factor the quadratic

  x = -6 or +5

The solution is x = 5.

_____

Side lengths cannot be negative. Solution values are values of x that make the factors zero. x+6=0 when x=-6, for example.

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of the 50 players in a school band 12% play a woodwind instrument how many players play a woodwind instrument ​
klasskru [66]

Answer:

6

Step-by-step explanation:

multiply 50 by .12 to get 6

4 0
3 years ago
According to the scale on a road map, 3 cm represents 45 kilometers. if two cities measure 10 cm apart on the map, how many kilo
denpristay [2]
150 Km.

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3 years ago
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Vladimir [108]
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2 years ago
Sarah took the advertising department from her company on a road trip to meet with a potential client including Sarah a total of
Svetach [21]
Sarah has spent 7 first class tickets, and 6 coach tickets that totals for 13 people that took the trip. 

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7 0
3 years ago
Point D is the centroid of Triangle ABC. Find CD and CE.<br> DE = 9
sukhopar [10]

Given:

Point D is the centroid of Triangle ABC and DE = 9.

To find:

The measures of CD and CE.

Solution:

We know that, centroid is the intersection of medians and it divides each median in 2:1.

In triangle ABC, CE is a meaning and centroid D divided CE in 2:1. So,

Let the measures of CD and DE are 2x and x respectively.

DE = 9                (Given)

x=9

Now,

CD=2x

CD=2(9)

CD=18

And,

CE=CD+DE

CE=18+9

CE=27

Therefore, the measure of CD is 18 units and the measure of CE is 27 units.

6 0
3 years ago
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