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SVETLANKA909090 [29]
3 years ago
12

Explain in your own words how to solve a one-step equation.

Mathematics
1 answer:
vovangra [49]3 years ago
3 0

Answer:

Solve the problem by taking whats preformed on the variable, inverse it getting the variable by itself.

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What was the initial quantity of vanadium-49, which has a half-life of 330 days, if after 540 days there is a 1,750 g sample rem
Marizza181 [45]

Answer:

  (a)  5440.42 g

Step-by-step explanation:

The amount remaining (Q) is given in terms of the initial amount (Q₀) by the exponential decay formula ...

  Q = Q₀(1/2)^(t/330) . . . . . where t is in days

__

The amount after 540 days is ...

  1750 g = Q₀(1/2)^(540/330) = 0.321666Q₀

  Q₀ = (1750 g)/(0.321666) ≈ 5440.42 g

The initial quantity was about 5440.42 grams.

5 0
3 years ago
Y and x have a proportional relationship, and y = 7 when x = 2. What is the value of x when y = 21?
RSB [31]
Y and x have a relationship that is directly proportional;
y = 7 when x = 2
when y = 21 and x = ?
y : x
7 : 2
if we multiply 7 wit 3, the answer is 21
3 x 7 : 2 x 3
21 : 6
So, when y = 21, x = 6
3 0
3 years ago
Read 2 more answers
What is the domain of the function? y=sqrt(4x+8)
Flura [38]
Obviously (hopefully) a square root function cannot be negative. 

<span>Also, 4x-8 must be >= 0, otherwise the sqrt is undefined for the reals. </span>

<span>4x-8 >= 0 </span>

<span>4x >= 8 </span>

<span>x >= 2 </span>

<span>Then the range is [0, inf) </span>
<span>The domain is [2, inf)</span>
5 0
4 years ago
Read 2 more answers
Help me please and maybe explain how you go the answer
gregori [183]

Answer:

C.  x + 2y = 10

   -4x - y = 2

Step-by-step explanation:

A. quickest way is to plug in -2, 6  and see which one works

B. this is the other way

1. x + 2y = 10

-4x - y = 2

2. multiply 4 with  x + 2y = 10 so i can get 4x + 8y = 40

i want +4x so i can cancel with the -4x in  -4x - y = 2

3.

4x + 8y = 40

-4x - y = 2

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

7y = 42

y = 6

4. then plug in 6 into an equation to get x

-4x - y = 2

-4x -6 = 2

-4x = 8

x = -2

3 0
3 years ago
In addition to the following closing costs listed below, the buyer pays a realtor commission that is 3.5% of the loan amount.
aleksklad [387]
Solving for the realtor commission we have:
$165,000 x 0.035 = $5775 (3.5% of the loan amount)

Solving for closing cost, we total all of the costs including the realtor commission:
$5775 + $280 + $476 + $675 + $200 + $118 + <span>$573 = $8,097.</span>
7 0
3 years ago
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