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MissTica
3 years ago
5

A temperature of 3225 °F will melt platinum. Gold melts at a temperature of 1947.974 °F.

Mathematics
1 answer:
sertanlavr [38]3 years ago
4 0

Questions like this ("how much higher is x than y?") are answered by computing the ratio of the two quantities.

In fact, for example, the answer to "how much higher is 10 than 5?" is 2, because 10:5 = 2, and indeed 10 is twice as much as 5.

So, we have

\dfrac{3225}{1947.974}\approx 1.65

So, the melting temperature of platinum is about one time and a half higher than the melting temperature of gold.

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3 years ago
) Kora is working on a scrapbooking project. She buys packages of stickers at two different stores.
Rus_ich [418]

The expression that can be used to represent the total price is 3(p - $0.75) + 5(p - $1).

The expression that can be used to determine the total amount spent in store A is:

  • number of stickers bought x ( price of the item - discount)
  • number of  stickers bought = 5
  • price of the stickers  = p
  • discount = $1

5(p - $1)

The expression that can be used to determine the total amount spent in store B is:

  • number of stickers bought x ( price of the item - discount)
  • number of  stickers bought = 3
  • price of the stickers  = p
  • discount = $0.75

3(p - $0.75)

Total price = 3(p - $0.75) + 5(p - $1)

A similar question was solved here: brainly.com/question/25717996

Please find attached an image with the complete question.

8 0
2 years ago
A total of $20,000 is to be invested, some in bonds and some in certificates of deposit (CDs). If the amount invested in bonds i
Brilliant_brown [7]

Answer:

$8,500 in CDs; $11,500 in bonds

Step-by-step explanation:

Let c = amount invested in CDs.

Let b = amount invested in bonds.

"A total of $20,000 is to be invested, some in bonds and some in certificates of deposit (CDs)."

From the total investment, we get this equation.

c + b = 20000

"If the amount invested in bonds is to exceed that in CDs by $3000"

From the details of the amounts, we get this equation.

b = c + 3000

We have a system of equations in two unknowns.

c + b = 20000  Eq. 1

b = c + 3000  Eq. 2

Since Eq. 2 is already solved for b, we will use the substitution method to solve the system of equations.

Substitute b in Eq. 1 with c + 3000.

c + c + 3000 = 20000

2c + 3000 = 20000

2c = 17000

c = 8500

Now substitute c = 8500 in Eq. 2 and solve for b.

b = c + 3000

b = 8500 + 3000

b = 11500

Answer: $8,500 in CDs; $11,500 in bonds

6 0
3 years ago
Please explain how to solve step by step. Thank you.
Brut [27]

3x-2 = 5x-14

Subtract 3x from each side:

-2 = 2x -14

Add 14 to each side:

12 = 2x

Divide both sides by 2:

x = 12/2

x = 6

4 0
3 years ago
Lauren deposited $3,000 into a savings account with an annual interest rate of 0.75%. She made no deposits or withdrawals for 3
Dennis_Churaev [7]
The upper one is correct. Because 0,75% = 0,0075 ( :10) and since the interest rate is positive it has to be 1 + ...
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