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weqwewe [10]
2 years ago
5

Five years ago alex was 12 times as old as tom alex is 41 now how old is tom now

Mathematics
1 answer:
anastassius [24]2 years ago
8 0

Step-by-step explanation:

I think this will help you. Thanks.

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Solve the following system of equations using elimination: <br> -x+5y=8 <br> And<br> 3x+7y=-2
djyliett [7]

Answer:

x=-3, y=1. (-3, 1).

Step-by-step explanation:

-x+5y=8

3x+7y=-2

----------------

3(-x+5y)=3(8)

3x+7y=-2

--------------------

-3x+15y=24

3x+7y=-2

------------------

22y=22

y=22/22

y=1

-x+5(1)=8

-x+5=8

-x=8-5

-x=3

x=-3

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2 years ago
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Reaction 4 has two reactants, but Pb is an element and not an ionic compound. No ionic parts are exchanged. 

Hence, the answer is Reaction 2. Both NaBr and Ca(OH)2 are ionic compounds. Br - is the anion in NaBr, and (OH)2 is also an anion. Ionic parts are exchanged. 
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3 years ago
Factor 3/4 out of 3/4z+6.
Bingel [31]

Answer:

Step-by-step explanation:

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2 years ago
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That would depend on the size of your classroom. but, typically the answer is no
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Evaluate k to the 6th power times p to the -7 power when k is 2 and p is -1
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\bf ~~~~~~~~~~~~\textit{negative exponents}&#10;\\\\&#10;a^{-n} \implies \cfrac{1}{a^n}&#10;\qquad \qquad&#10;\cfrac{1}{a^n}\implies a^{-n}&#10;\qquad \qquad a^n\implies \cfrac{1}{a^{-n}}&#10;\\\\[-0.35em]&#10;\rule{34em}{0.25pt}\\\\&#10;k^6p^{-7}~~&#10;\begin{cases}&#10;k=2\\&#10;p=-1&#10;\end{cases}\implies (2)^6(-1)^{-7}\implies \cfrac{2^6}{(-1)^7}\implies \cfrac{64}{-1}\implies -64

7 0
3 years ago
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