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Anit [1.1K]
3 years ago
14

I really need some help here.

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
8 0

Answer:

a 1/7

Step-by-step explanation:

The given proprty is

a 1/n = n√a ...(i)

The given expression is

7√a  ...(ii)

on comparing (i) and (ii), we get

n = 7

Using (i) the given expression can be written as

7√a = a 1/7

Therefore, the required expression is

a 1/7

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What is the value of the expression 3.9 times 10^5 /1.3 times 10^2
elena-s [515]
\bf ~~~~~~~~~~~~\textit{negative exponents}
\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad 
a^n\implies \cfrac{1}{a^{-n}}
\\\\
-------------------------------\\\\
\cfrac{3.9\times 10^5}{1.3\times 10^2}\implies \cfrac{3.9}{1.3}\times \cfrac{10^5}{10^2}\implies 3\times 10^5\cdot 10^{-2}\implies 3\times 10^{5-2}
\\\\\\
3\times 10^3\implies 3.0\times 10^3
5 0
3 years ago
I need the answers to all 4 asap please!! they shouldn’t be too hard
TiliK225 [7]

<em>parallelogram</em>

1. perimeter 10(2)+10(2)=32+20

   perimeter = 52cm

   area=b times h

  area = 16(9)=144cm2

   

2 <em>TRAPEZOID</em>

<em>   </em>perimeter =( 21+24+25+44.67)m

                      =114.67m

                     area= 1/2( b1+b2)h

                                1/2(44.67+25)20

                                696.7m2

3. perimeter = 2+3+12+2+3+5+3+2+9+7+3

                      =51<u>cm</u>

area = 54+6+6+6=72cm2<u> </u>      

4.    perimeter is  10+4+2+3+ 2+4+10+23 =    <u>58cm</u>

<u>area is </u>

(11+23).8=37.8

=272

trap-rect=136-6

<em>=130ft2</em>

3 0
3 years ago
Solve each system by substitution <br> Y=2x-18<br> Y=x-10
andrew11 [14]

Answer:

\displaystyle [8, -2]

Step-by-step explanation:

2x - 18 = x - 10

−8 = −x

\displaystyle 8 = x[Plug this back into both equations above to get the y-coordinate of −2]; \displaystyle -2 = y

I am joyous to assist you anytime.

4 0
4 years ago
If f(x) = 3x + 2, what is f(5)?
AleksandrR [38]

Answer: 17

Step-by-step explanation:

f(5) so x = 5

3x5 + 2

15 + 2

17

5 0
3 years ago
Read 2 more answers
Please help I'm very confused and frustrated.
Ray Of Light [21]

Step-by-step explanation:

-36.8 + 9.2(2). [as the value of x is 2]

-36.8 + 18.4

= - 18.4 [as the number with the

Negative sign is greater]

7 0
3 years ago
Read 2 more answers
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