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3 years ago

9 to the third power

Mathematics

2 answers:

natita [175]3 years ago

8 0

Answer:

729

Step-by-step explanation:

9 x 9 x 9

Alborosie3 years ago

7 0

Answer:729

Step-by-step explanation:

third power means squared, and that means that you multiply the number by it's self three times, 9*9=81, that's once. then again 81*9 =728

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For what values of q are the two vectors A = i + j + kq each other and B-iq-23 + 2kg perpendicular to

Sloan [31]

Answer:

The value of q are 0.781,-1.281.

Step-by-step explanation:

Given : Two vectors $A=i+j+kq$ and $B=iq-2j+2kq$ are perpendicular to each other.

To find : The value of q ?

Solution :

When two vectors are perpendicular to each other then their dot product is zero.

i.e. $\vec{A}\cdot \vec{B}=0$

Two vectors $A=i+j+kq$ and $B=iq-2j+2kq$

$(i+j+kq)\cdot (iq-2j+2kq)=0$

$(1)(q)+(1)(-2)+(q)(2q)=0$

$q-2+2q^2=0$

$2q^2+q-2=0$

Using quadratic formula,

$q=\frac{-1\pm\sqrt{1^2-4(2)(-2)}}{2(2)}$

$q=\frac{-1\pm\sqrt{17}}{4}$

$q=\frac{-1+\sqrt{17}}{4},\frac{-1-\sqrt{17}}{4}$

$q=0.781,-1.281$

Therefore, The value of q are 0.781,-1.281.

6 0

2 years ago

Multiple w and 8.Then,add 5

saw5 [17]

Answer:

8w+5

Step-by-step explanation:

8*w=8w

8w+5

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3 years ago

What is the simplified value of the expression below?

Y_Kistochka [10]

Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

Help me on the Elizabeth problem please

EastWind [94]

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