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9966 [12]
3 years ago
11

Sara is making a key chain using the bead design shown. What fraction of the beads in her design are either blue or red? (red)(

blue)(white)(blue)(red)(white)(red)(blue)(red)(white)(red)(blue)(white)(blue)(red)
Mathematics
1 answer:
lana [24]3 years ago
8 0
Red: 6/15
blue:5/15 or 1/5
white:4/15

6/15+5/15=11/15


the answer is 11/15
You might be interested in
What is the sum of a 12-term arithmetic sequence where the last term is 13 and the common difference is -10?
Y_Kistochka [10]
\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
n=12\\
d=-10\\
a_{12}=13
\end{cases}
\\\\\\
a_{12}=a_1+(12-1)d\implies 13=a_1+(12-1)(-10)
\\\\\\
13=a_1-110\implies \boxed{123=a_1}

\bf \\\\
-------------------------------\\\\
\textit{sum of a finite arithmetic sequence}\\\\
S_n=\cfrac{n}{2}(a_1+a_n)\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
a_n=\textit{value of the }n^{th}\ term\\
------------\\
n=12\\
a_1=123\\
a_{12}=13
\end{cases}
\\\\\\
S_{12}=\cfrac{12}{2}(a_1+a_{12})\implies S_{12}=\cfrac{12}{2}(123+13)

and surely you know how much that is.
6 0
4 years ago
A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu
julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/\sqrt{1492}

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

8 0
2 years ago
Someone help me with this please
yan [13]

Answer:

hope it helps

plz mark brainliest✌️✌️

4 0
3 years ago
In the diagram, BC⎯⎯⎯⎯⎯∥DE⎯⎯⎯⎯⎯ .
RUDIKE [14]

The length of AE is 18in

Explanation:

From the figure, we can see that the two triangles ΔAED and ΔACB are similar. Thus, the legs of the triangle are proportional to each other.

Thus, we have,

\frac{EC}{DB} =\frac{AE}{AD}

Substituting the values of the sides from the image, we get,

\frac{3}{1} =\frac{AE}{6}

Multiplying both sides of the equation by 6, we get,

6(3)=AE

Multiplying, we have,

18=AE

Thus, the length of AE is 18in

7 0
3 years ago
This is a question from mathswatch can someone pls answer it
marin [14]

Answer:

a) 5,8,11 b)32

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
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