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Readme [11.4K]
4 years ago
15

Sonia used $12.50 to buy a new journal. She has $34.25 left in her savings account. How much money did Sonia have before she bou

ght the journal? Write and solve an equation to solve
Mathematics
2 answers:
natali 33 [55]4 years ago
3 0
  1. X-12.50=34.25
  1. Add 12.50 to both sides
  2. X=46.75
tatuchka [14]4 years ago
3 0
X=46.75 and that would be the answer
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How old would I be if I was born in 1921
earnstyle [38]
2016 - 1921 = 95
Hope this helped!
6 0
3 years ago
If 800g of a radioactive substance are present initially and 8 years later only 450g remain, how much of the substance will be p
artcher [175]

A=Pe^(rt)

P = 800g

t = 8 years

A = 450g

r = This is what we will try and find to start with

450=800e^(r*8)

After running the math through a calculator, we end with r = -0.07192

Now we just re-input this information into our equation: A=800e^(-0.07192*16)

A=800e^(1.15072)

Now we will re-write the equation using the negative exponent rule:

A = 800 1/e^1.15072

Combine right side:

A = 800/e^1.15072

Then do the math:

A = 253.12709836......

That will give us A = 253 (rounded to the whole number)

I hope this helps! :)

5 0
3 years ago
Please help! My max is 17 points that how much they gave me!!
Firdavs [7]
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6 0
4 years ago
Two functions are combined resulting in the function j(x) = –3x2 + 5.
labwork [276]

Answer:

two quadratic functions combined by addition

a linear function and a quadratic function combined by addition

two linear functions combined by multiplication

Step-by-step explanation:

-3x² + 5

(-4x² + 4) + (x² + 1)

-3x² + 5

(-3x² - x) + (x + 5)

-3x² + 5

(sqrt(5) - sqrt(3)x)(sqrt(5) + sqrt(3)x)

7 0
3 years ago
our friends are going to the movies. The cost of one ticket is $9.50, and the cost of one large popcorn is $4.50. The expression
horrorfan [7]

Answer:

No clue not even close to a clue

8 0
3 years ago
Read 2 more answers
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