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dsp73
3 years ago
15

Martin Luther King, Jr. Middle School has a bake sale, selling only cookies and cupcakes. For every 15 cookies sold, there are 7

cupcakes sold.
If 110 items are sold, how many will be cupcakes?
Mathematics
2 answers:
goldfiish [28.3K]3 years ago
8 0
Do u have notes cause if you do that will help.
lora16 [44]3 years ago
4 0
The answer is 49 because 15 can go in 110 7 time and 7*7=49
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9x10^7 is how many times as large as 3x10^-2
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Answer:

3000000000 times bigger

Step-by-step explanation:

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Use a matrix to solve the system:
Romashka-Z-Leto [24]

Answer:

(2.83 , 1 , 4)

Step-by-step explanation:

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Rewrite these equations in matrix form

\left[\begin{array}{ccc}2&2&-1\\4&-2&-2\\3&3&-4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\

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AX=B\\X=A^{-1}B

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We get the inverse of matrix A,

A^{-1}=\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]  \\

now multiply the matrix with B

X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2.83\\1\\4\end{array}\right] \\

4 0
3 years ago
Haley has five times as many stuffed animals as she does dolls. Her brother has 18 more video games than Haley has stuffed anima
34kurt

Answer:

93

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
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Gre4nikov [31]
For this case, the first thing we must do is define variables.
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8 0
3 years ago
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PSYCHO15rus [73]
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Hope this helps!
8 0
3 years ago
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