3 years ago

Which rate is not a unit rate

Mathematics

1 answer:

andrezito [222]3 years ago

3 0

Answer:

b 5/3

Step-by-step explanation:

becouse 5/3 pound is not a unit a unit would have more like c d and a

so b is right

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Which of the given values is a solution to the equation −11=5t−9

padilas [110]

-11+9= 5t
-2=5t (divide both sides by 5)
t= -2/5

(Mark me the brainliest if this has helped )

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3 years ago

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What is the slope of (-3, 1) and (2, -1)

solmaris [256]

Answer:

the slope is -2/5

Step-by-step explanation:

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3 years ago

Which of the following interpretations for the given expression is true

iris [78.8K]

I don't know it's so difficult

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3 years ago

O triplo de um mumero somado a 9 e igual a 30 .qual e esse numero

-Dominant- [34]

Do you think than i ve understood it right

3x+9=30

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hope helped

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4 years ago

Simplify (Are all division) 2+4i 3i 3+2i 4+i 2i^11

Alla [95]

$We\ know:\ i=\sqrt{-1}\to i^2=-1$

$\dfrac{2+4i}{3i}=\dfrac{2+4i}{3i}\cdot\dfrac{3i}{3i}=\dfrac{6i+12i^2}{9i^2}=\dfrac{6i+12(-1)}{9(-1)}\\\\=\dfrac{6i-12}{-9}=\dfrac{2i-4}{-3}=\dfrac{4}{3}-\dfrac{2}{3}i$

$\dfrac{3+2i}{4+i}=\dfrac{3+2i}{4+i}\cdot\dfrac{4-i}{4-i}=\dfrac{(3+2i)(4-i)}{4^2-i^2}\\\\=\dfrac{(3)(4)+(3)(-i)+(2i)(4)+(2i)(-i)}{16-(-1)}=\dfrac{12-3i+8i-2i^2}{16+1}\\\\=\dfrac{12+5i-2(-1)}{17}=\dfrac{12+5i+2}{17}=\dfrac{14+5i}{17}=\dfrac{14}{17}+\dfrac{5}{17}i$

$2i^{11}=2i^{10+1}=2i^{10}i^1=2i^{2\cdot5}i=2i(i^2)^5=2i(-1)^5=2i(-1)=-2i$

$Used:\ (a+b)(a-b)=a^2-b^2$

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3 years ago