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Cloud [144]
3 years ago
6

Factor 15x3-5x2+6x-2by grouping.what is the resulting expression?

Mathematics
1 answer:
Valentin [98]3 years ago
6 0
15x3 - 5x2 + 6x - 2
= 5x2(3x - 1) + 2(3x - 1)
= (5x^2 + 2)(3x - 1) answer
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Sonbull [250]

Answer:

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Step-by-step explanation:

Let's call the white marbles w and the red marbles r. We can write:

w + r = 16 (1)

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r = 5 (divide by 4) which means w = 16 - 5 = 11

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3 years ago
In a right triangle ABC,right angled at B,the ratio of AB to AC is 1:root 2.Find the value of 2tanA/1-tan square A
Helen [10]
Since we know that ratio of AB : AC is 1 : √2, then we can more or less use those values for the sides, check the picture below.

so we're really looking for tan(2A).  Let's bear in mind that tan²(θ) is just another way to write [ tan(θ) ]².

\bf \stackrel{\textit{Double Angle Identities}}{tan(2\theta)=\cfrac{2tan(\theta)}{1-tan^2(\theta)}}\\\\
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tan(2A)=\cfrac{2tan(A)}{1-tan^2(A)}\implies \cfrac{2\left( \sqrt{2} \right)}{1-(\sqrt{2})^2}\implies \cfrac{2\sqrt{2}}{1-2}\implies -2\sqrt{2}


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4 years ago
Tyrese wants to buy baseball cards. They cost $5.00 per pack. There is a 25% discount before tax if 10 or more packs are purchas
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Answer:

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I need help with this math problem
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Step-by-step explanation:

Use the following ratio:

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Answer:

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Step-by-step explanation:

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