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4 years ago

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MATH IN BIOLOGY

1 answer:

Alex_Xolod [135]4 years ago

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There is 100,000,000km2 of land area

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What is the product of (-1.5)(0.8)?

Zolol [24]

Answer:

-1.2

Step-by-step explanation:

(-1.5) * .8 = -1.2

4 0

3 years ago

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What is the sum of 1/8 + 5/6 + 3/8 =

PSYCHO15rus [73]

Answer:

1 1/3

Step-by-step explanation:

6 0

3 years ago

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Look at the student work shown below.

cluponka [151]

Alrighty, so you said, simplify: 4t (2s - 7)

When there is a variable or number outside of the parenthesis, it means that it wants the whole thing multiplied by that number.

So, your right way to do this is:

4t (2s) + 4t (-7)

Simplify.

8st - 28t

So, the student incorrectly simplified them because she didn't multiply -7 by 4t like they should have.

~Hope I helped!~

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3 years ago

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Markers are sold in boxes packs or as single markers each box has 10 packs each pack has 10 markers draw picture to show two way

Nadya [2.5K]

2 boxes and 15 packs

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4 years ago

Write the left side of each equation as a product of linear factors, and state the solutions.

Amiraneli [1.4K]

Answer:

a). $x_{1}=1$ , $x_{2}=1$ , $x_{3}=1$

b). $x_{1}=2$ , $x_{2}=2$ , $x_{3}=2$

c). $x_{1} = \sqrt{-5}$ , $x_{2} = \sqrt{-5}$ , $x_{2} = \sqrt{-2}$ , $x_{4} = \sqrt{-2}$

Step-by-step explanation:

a.

$x^{3}-1=0\\x^{3}=1\\ x=(1 )^{\frac{1}{3} }$

$x=1$

b.

$x^{3}+8=0\\x^{3}=-8\\ x=(-8 )^{\frac{1}{3} }$

$x= 2i$

c.

$x^{4} +7x^{2} +10=0\\x^{4}=u^{2} \\x^{2}=u\\ u^{2}+7u+10=0\\$

Using

$\frac{-b+/-\sqrt{7^{2}-4*a*c } }{2*a}$

$u=\frac{-7+/-\sqrt{7^{2}-4*10}}{2}=-\frac{7}{2} +/- \frac{\sqrt{49-40} }{2} \\ u=-\frac{7}{2} +/- \frac{3}{2} \\u_{1}= -5\\u_{2}= -2$

But u is no the factor is x so:

$x=\sqrt{u}\\ x_{1} =\sqrt{-5} =5i\\ x_{2} =\sqrt{-2} =2i$

Check:

$(\sqrt{5i})^{4} +7*(\sqrt{5i})^{2} +10=0\\25*i^{4} +7*5*i^{2}+10=0\\ 25*1+7*5*-1+10\\25-35+10=0\\0=0$

4 0

4 years ago