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NNADVOKAT [17]
3 years ago
14

What expression is equivalent to 2(m-5)+6? 2m-1 2m+22 2m-4 2m+16

Mathematics
2 answers:
Andru [333]3 years ago
8 0

Answer:

2m-4

Step-by-step explanation: I did this exam!

DedPeter [7]3 years ago
7 0
2(m-5)+6
2m - 10+ 6
2m - 4
this is the answer
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A line segment has endpoints at (2, -3) and (5,-3). What is the equation of the perpendicular bisector of the line segment?
kozerog [31]
X=3.5 ........................
7 0
3 years ago
Five times a number decreased by nine is equal to twice the number increased by 23. Which equation could be used to solve the pr
Agata [3.3K]

Answer:

5x-9=2x+23

Step-by-step explanation:

8 0
3 years ago
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Today, the waves are crashing onto the beach every 4.8 seconds. The times from when a person arrives at the shoreline until a cr
kaheart [24]

Answer:

61% of the time a person will wait at least 1.872 seconds before the wave crashes in.

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The probability that we find a value X lower than x is given by the following formula.

P(X \leq x) = \frac{x - a}{b-a}

Uniform distribution from 0 to 4.8 seconds.

This means that a = 0, b = 4.8

61% of the time a person will wait at least how long before the wave crashes in?

This is the 100 - 61 = 39% percentile, which is x for which P(X \leq x) = 0.39. So

P(X \leq x) = \frac{x - a}{b-a}

0.39 = \frac{x - 0}{4.8 - 0}

x = 4.8*0.39

x = 1.872

61% of the time a person will wait at least 1.872 seconds before the wave crashes in.

5 0
3 years ago
A rectangle is 12 cm longer than it is wide. If its length and width are both decreased by 2 cm, its area is decreased by 108 cm
mario62 [17]

Let the width be "x" cm.

Then the length is "x+12" cm

And the area = x(x+12) = x^2+12x cm^2

----------------------------

Change the dimensions:

width = "x-2" cm

length = "x+10" cm

New area = (x-2)(x+10) = x^2 + 8x - 20 cm^2

------------------

Equations :

Old area - New area = 108 cm^2

x^2+12x -(x^2 + 8x - 20) = 108

4x + 20 = 108

4x = 88

x = 22 cm (original width)

x+12 = 24 cm (original length)

5 0
3 years ago
Which of the following expression cannot be factored out using difference of two square
Ratling [72]

Answer:

d

Step-by-step explanation:

Factoring using difference of squares

a² - b² = (a - b)(a + b)

a

x² - 1

= x² - 1²

= (x - 1)(x + 1)

b

x² - y²

= (x - y)(x + y)

c

x² - 4

= x² - 2²

= (x - 2)(x + 2)

d

4 - 16y ← 16y is not a perfect square and so cannot be factored

If it was 4 - 16y² then it could be factored using difference of squares

5 0
3 years ago
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