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Naily [24]
2 years ago
8

which of the following expressions is equivalent to 3a-2ax4a+6a? (a) 4a^2+6a (b)3a-20a^2 (c) 9a-8a^2 (d) a^2

Mathematics
1 answer:
lianna [129]2 years ago
4 0

Answer:

\boxed{\sf (c) \ 9a - 8 {a}^{2}}

Step-by-step explanation:

\sf Simplify  \: the \:  following: \\  \sf \implies 3a - 2a \times 4a + 6a \\  \\  \sf  - 2a \times 4a =  - 2 {a}^{2} \times 4  :  \\  \sf  \implies  \boxed{ \sf - 2 {a}^{2}  \times 4} + 3a + 6a \\  \\  \sf  - 2 \times 4 =  - 8 :  \\  \sf \implies   \boxed{ \sf- 8} {a}^{2}  + 3a + 6a \\  \\  \sf 3a + 6a = 9a :  \\  \sf \implies 9a - 8 {a}^{2}

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2 years ago
French Co. marks up its goods 45% on cost. What is French's equivalent markup on selling price? Round to the nearest hundredth p
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<span>Let
CP ------> cost price
SP ------> Selling price

we know that
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2 years ago
A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every ba
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Answer:

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Step-by-step explanation:

Information provided

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Hypothesis

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The statistic for this case is:

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And replacing the info given we got:

z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68  

5 0
2 years ago
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