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3 years ago

Please answer and simplify -5/8 + (-8/5)

2 answers:

7 0

$\text{First, find the common denominator for the fractions}\\\\-\frac{5}{8}+(-\frac{8}{5})\\\\\text{We know that they both can multiple to 40, 8 times 5; 5 times 8}\\\\\text{The multiplying you're doing in the bottom, you will do the same for}\\\text{the top}\\\\\text{Your expression should look like this:}\\\\-\frac{25}{40}+(-\frac{64}{40})\\\\\text{Add across}\\\\\boxed{-\frac{89}{40}}\\\\\text{You can't simplify it any further, so that would be the simplest form}\\\text{in a improper fraction}$

$\text{In you need it as a mixed number, your answer would be:}\\\\\boxed{-2\frac{9}{40}}$

alexandr402 [8]3 years ago

6 0

Answer:

-89/40 or simplified it is -2 9/40

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Seventh graders collected some gold sand on a class field trip.

satela [25.4K]

Answer:

Class 7A collected 4.8 ounces of pure gold.

Step-by-step explanation:

Key skills required are: Percentages, Multiplication

We only need the information about Class 7A. They collected 40 oz that contains 12% gold.
In other words, this means that 12% of that 40 oz gold sand is pure gold.

Here we have to do 12% x 40 to find the number of oz of pure gold. We first have to convert 12% into a decimal. Divide it by a 100 (or move the decimal point 2 places to the left) and you will get 0.12.

Do 0.12 x 40 and you will get 4.8

Therefore, there are 4.8 oz of pure gold in Class 7A's gold sand

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2 years ago

Fencing costs $25.80 per yard. How much does it cost to enclose two adjacent rectangular pastures as shown x=50 5/8 y=30 2/9

Maslowich

Answer:

54.65

Step-by-step explanation:

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2 years ago

Is 25% of a whole always the same amount ?

wel

Answer:

Not, will be the same proportion but the amount vary depending the specific case.

Best regards

6 0

3 years ago

Read 2 more answers

jesse had a balance of 1200 on a credit card with an APR of 18.7% compounded monthly. About how much will he save in interest ov

igor_vitrenko [27]

Jesse saved about $85.77 in interest over the course of a year if he transfer from one credit card to another.

<h3>What is the interest accrued on savings?</h3>

The interest accrued on saving is the interest gained on saving or investment over a period of time.

The amount of money saved in interest by Jesse over a period of 12 months provided that the transferred his balance to a credit card is calculated as follows:

Amount saved = $\mathbf{P_x(1 + \dfrac{r}{P_x})^{12}-P_y(1 + \dfrac{r}{P_y})^{12}}$

Amount saved = $\mathbf{1200(1 + \dfrac{18.7}{1200})^{12} - 1200(1 + \dfrac{12.5}{1200})^{12}}$

Amount saved = $85.768

Amount saved = $85.77

Learn more about interest accrued on a savings here:

brainly.com/question/1434515

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5 0

1 year ago

Three fair coins are tossed. If all land "heads," the player wins $10, and if exactly two land heads, the player wins $5. If it

hodyreva [135]

Answer:

After four games, a player can lose up to $ 16 to win up to $ 26. These are the probabilities for every game:

1/8 or 12.5% of landing three "heads"

3/8 or 37.5% of landing two "heads"

4/8 or 50% of landing no or only one "head".

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

If three coins land "heads" the player wins $ 10

If two coins land "heads" the player wins $ 5

Cost of playing = $ 4

2. What is the player's expected outcome after four games?

Probability of two coins out of three lands "heads" = 3/8

Probability of three coins out of three lands "heads" = 1/8

Now, let's calculate the player's expected outcome, as follows:

Four games:

Cost = 4 * 4 = $ 16

Worst-case scenario: No wins

Best-case scenario: 4 out of 4 of $ 10 win

Worst-case scenario profit or loss = 0 - 16 = Loss of $ 16

Best-case scenario profit or loss = 40 - 16 = Profit of $ 24

After four games, a player can lose up to $ 16 to win up to $ 26. These are the probabilities for every game:

1/8 or 12.5% of landing three "heads"

3/8 or 37.5% of landing two "heads"

4/8 or 50% of landing no or only one "head".

8 0

2 years ago