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Arturiano [62]
3 years ago
13

Which expression is equivalent to (3^2)^-2? A.)–81 B.)–12 C.)1/18 D.)1/12

Mathematics
1 answer:
kobusy [5.1K]3 years ago
7 0
(3^2)^-2
9
9^-2 = 1/9^2 ---> 1/81
should be 1/81
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#20 please help me solve this
Gelneren [198K]

Answer:

A pound of a JELLY BEANS cost $2.5

A pound of TRAIL MIX cost $1.5

Step-by-step explanation:

From the question, we can draw out two equations and solve them simultaneously.

We should make some mild assumptions to make it easier:

Let Jelly beans be j

Let Trail mix be t

Therefore, we can extract these equations.

5j + 3t =$ 17 ...........i

2j + 12t = $ 23...…..ii

Let's Multiply equation (I) by 4 so that we can easily eliminate.

20j + 12t = $ 68..... iii

Let equation (iii) minus equation (ii)

18j + 0t = $45

18j = $45

j = $45/18

j = $2.5

A pound of a JELLY BEANS cost $2.5

Let's substitute j= $2.5 in EQUATION (I) so as to solve for TRAIL MIX.

5j + 3t =$ 17

5(2.5) + 3t = 17

12.5 + 3t = 17

3t = 17 - 12.5

3t = 4.5

t = $1.5

A pound of TRAIL MIX cost $1.5

7 0
3 years ago
I cant figure out if I can go 171 miles on 3.7 gal. how far can I go on 12.5gal.
Anettt [7]

Answer:

I believe if im not mistaken it would be 1,504.8


5 0
3 years ago
Read 2 more answers
Here are sketches of four triangles.
baherus [9]

Answer:

3.4

Step-by-step explanation:

If we look at the top left triangle and the triangle with x, we notice that they are similar (since they have a 57° and a right angle). This means that 4 / 1 = x / 0.84, which means that x = 3.4.

7 0
3 years ago
Solve the simultaneous equations<br> -x + 5y = -7<br> x + y = – 5<br> x = 1<br> y= 0
vodomira [7]

y= -5-x

-x + 5(-5-x) = -7

-x -25-5x =-7

-x-5x = 25 -7

-6x= 18

x = -3

-3 +y = -5

y= -5 +3

=-2

-(-3) + 5(-2)

3 - 10 = -7

5 0
3 years ago
Read 2 more answers
Please help answer the first 2 boxes for brainslt <br><br> &gt; for brainslt
katen-ka-za [31]
Where is this at?

Could you send it in comments here or something?
6 0
2 years ago
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