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UkoKoshka [18]
4 years ago
12

Mark says that to divide 58 by 0.65, you only need to multiply both numbers by ten because that will give you a whole number. Ja

n says you need to multiply both numbers by 100. Who is correct and why?
Mathematics
2 answers:
Liono4ka [1.6K]4 years ago
7 0
Jan is correct because 0.65 times 10 is 6.5, which is still a decimal. 0.65 times 100 is 65, which is a whole number. Then the equation would be 5800 times 65.

Hope this helps... mark as Brainliest plz
Evgen [1.6K]4 years ago
4 0
Jan because if you cross multiply thats how you get it right
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photoshop1234 [79]

Answer: β ≠ ±1

Step-by-step explanation: For a system of equations to have an unique solution, its determinant must be different from 0: det |A| ≠ 0. So,

det \left[\begin{array}{ccc}1&\beta&1-\beta\\2&2&0\\2-2\beta&4&0\end{array}\right] ≠ 0

Determinant of a 3x3 matrix is calculated by:

det \left[\begin{array}{ccc}1&\beta&1-\beta\\2&2&0\\2-2\beta&4&0\end{array}\right]\left[\begin{array}{ccc}1&\beta\\2&2\\2-2\beta&4\end{array}\right]

8(1-\beta)-[2(2-2\beta)(1-\beta)]

8-8\beta-4+8\beta-4\beta^{2}

-4\beta^{2}+4\neq 0

\beta^{2}\neq 1

\beta \neq \sqrt{1}

β ≠ ±1

For the system to have only one solution, β ≠ 1 or β ≠ -1.

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4 years ago
Can anyone help me? can u solve this for me?
AnnZ [28]

x=8 is the answer fellow user

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4 years ago
What is the value of x when 3x < -2x + 15
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Answer:

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3 x = 15  Divide each term in  − 3 x = 15  by - 3 . − 3 x − 3 +15 =− 3 Cancel the common factor of  − 3 . Cancel the common factor. − 3 x − 3 = 15 − 3 Divide  x by  1 . x = 15 − 3 by  − 3 . x = − 5

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