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3 years ago

In a sample of 30 coin flips, heads came up 6 times. What is the sample proportion for heads?

Mathematics

2 answers:

Kitty [74]3 years ago

6 0

You would divide 6 by 30.
6/30=0.2
Therefore the answer is D

lions [1.4K]3 years ago

5 0

Answer: 0.1

Step-by-step explanation:

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Solve x + y = 5 using matrices. 2x – y = 1 I have the answer, x = 2 and y =3, how do I phrase this as a matrices? (2,3)?

BartSMP [9]

X +y = 5

x = 5-y

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

2x -y = 1

2•(5-y) -y = 1

10 -2y -y = 1

10 -3y = 1

-3 y = 1-10

-3y = -9

then you can divide it
y = -9/-3

y= 3

for x :

x + y = 5

x + (3) = 5
x= 5-3
x= 2

(x,y)

(2,3)

7 0

3 years ago

12ad^3 and which terms are like terms? 15a^3d 12d^3 3ad^3 10ad

storchak [24]

Like terms are terms with the exact same variables, and the exact same degree of each variable...simply put, the exponents of each variable have to be exactly the same.
The given term 12 ad³ has variables a and d. a has a degree of 1 and d has a degree of 3.
The term 3ad³ has the same variables and the same degree, and is therefore the like term.

8 0

3 years ago

Can anyone help me with this equation? I’m so lost. Thanks in advance

jeyben [28]

The measure of angle x is 31 degrees.

See the attached drawing.

Start at the bottom, at the given 59° angle, and work your way up in the direction toward the angle x .

6 0

3 years ago

Which of the following sequences is not arithmetic

MA_775_DIABLO [31]

Answer:

1,4,9,16...

Step-by-step explanation:

It does not have a common difference between each consecutive term, therefore it is not an arithmetic sequence.

8 0

2 years ago

the proper angle for a ladder is about 75 degrees. from the ground. suppose you have a 9 foot ladder. how far from the house sho

icang [17]

ANSWER:

2.33 foot

STEP-BY-STEP EXPLANATION:

We can calculate the distance from the staircase to the wall, by means of the trigonometric cosine ratio, which is the following:

$\begin{gathered} \cos \theta=\frac{\text{ adjacent}}{\text{ hypotenuse}} \\ \theta=75\text{\degree} \\ \text{ hypotenuse = 9 foot} \\ \text{adjacent = x} \end{gathered}$

Replacing and solving for x:

$\begin{gathered} \cos 75=\frac{x}{9} \\ x=9\cdot\cos 75 \\ x=2.33 \end{gathered}$

The distance would be 2.33 foot

3 0

1 year ago