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Novay_Z [31]
3 years ago
8

If you double President Carter's age at the time of his first inauguration and subtract his age at the time he died, the result

is 22 years. How old was President Carter when he died?
Mathematics
1 answer:
Ratling [72]3 years ago
7 0

Answer:

82 years

Step-by-step explanation:

J. Carter age at first inauguration = 52 ---- (missing details)

Required

Determine his age when he died.

Represent his age when he died with x.

So, we have the following expression:

2 * Age\ at\ First\ Inauguration - x = 22

[Substitute 52 for age at first inauguration]

2 * 52 - x = 22

[Multiply 2 by 52]

104 - x = 22

[Collect Like Terms]

-x = 22 - 104

[Make x the subject]

x = 104 - 22

x = 82

<em>Hence, he died at 82 years old.</em>

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How much Zn and how much HCl should be used to produce 1.5 g ZnCl2
tatuchka [14]

Answer:

  • 0.71963 g of Zn
  • 0.80256 g of HCl

Step-by-step explanation:

The required mass of reactants can be computed from the number of moles of product.

  moles of ZnCl₂ = (1.5 g)/(136.282 g) ≈ 0.0110066 moles

Then the mass of Zn required is ...

  mass of Zn = (0.0110066 mol)(65.382 g/mol) = 0.71963 g

Two moles of HCl are used in the reaction with each mole of Zn, so the mass of HCl required is ...

  mass of HCl = 2(0.0110066 mol)(36.458 g/mol) = 0.80256 g

_____

<em>Comment</em>

The discrepancy in the last two decimal places of the weights above versus the calculator output below comes from rounding of moles of Zn to 4 significant digits, instead of 5 or more. The number of moles of ZnCl₂ is closer to 0.0110066.

4 0
3 years ago
Find the value of x^2 + 1 divided by x^2 if x-1 divided by x =5
MrRa [10]

Answer:

x^2+1/x^2

(x+1/x)^2 = x^2+1/x^2 +2

(5)^2 = x^2+1/x^2 + 2

25 = x^2+1/x^2 + 2

25-2 = x^2+1/x^2

23 = x^2+1/x^2

Step-by-step explanation:

6 0
3 years ago
PLS HELP ME NEED FOR MATH PLS
enot [183]

y = 25x + 263 this equation represents how much money she will have, including her saving.

What is the linear equation?

A linear equation is an algebraic equation of the form y=mx+b, where m is the slope and b is the y-intercept, and only a constant and a first-order (linear) term are present. The variables in the above equation are y and x, and it is occasionally referred to as a "linear equation of two variables."

We have,

The saved amount of $263 by Jenna,

and also she earns $25 per day

if x represents the number of days she works,

and let's take y as the total amount she will have.

Then the equation becomes:
y = 25x + 263

Hence, y = 25x + 263 this equation represents how much money she will have, including her saving.

To learn more about the linear equation visit,

brainly.com/question/2030026

#SPJ1

4 0
1 year ago
I’ve got a couple trigonometry questions that I really need help on. I don’t understand them at all.
wel

Answer:

Q5. Option 1

Q7. Option 4

Step-by-step explanation:

Please see the attached pictures for full solution.

5 0
3 years ago
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