-PLEASE HURRY- this is the third time I’ve asked this question and no one has given me an answer.How do I evaluate/solve multi-step expressions?

Answer:

Part A. 37.4p  ≥ 170

Part B. p  ≥ 5 (rounding to the next whole)

Renna needs to remove at least 5 packages from the elevator to meet the mass requirement.

Step-by-step explanation:

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

Mass limit for the elevator = 450 kg

Renna and her load of packages mass = 620 kg

Each package mass = 37.4 kg

2. Write an inequality to determine the number of packages, p, Renna could remove from the elevator to meet the mass requirement.

Number of packages * Each package mass ≥ Renna and her load of packages mass - Mass limit for the elevator

Replacing with the values and variables we know:

p * 37.4 ≥ 620 - 450

37.4p  ≥ 170

3. What is the minimum whole number of packages Renna needs to remove from the elevator to meet the mass requirement?

Solving for p in the equation above, we have:

37.4p  ≥ 170

p  ≥ 170/37.4

p  ≥ 4.55

p  ≥ 5 (rounding to the next whole)

Answer:

4+0.75(m-5) ≤ 10

Step-by-step explanation:

We start out with 4, since the car wash charges $4 for the first 5 minutes.  We add to this the cost based on the minutes over 5 that he used the car wash.

Since m is the number of minutes, we first subtract 5 from this.  This is because the first 5 minutes are included in the initial $4.  Since each minute past 5 costs $0.75, we multiply m-5 by 0.75:

0.75(m-5)

Together this gives us

4+0.75(m-5)

He only has $10 to spend.  This means he must spend less than or equal to $10; this gives us

4+0.75(m-5) ≤ 10

Answer:

6.5%

Step-by-step explanation:

(48.75/750)*100%

=6.5%

Answer:

The answer is 70

Step-by-step explanation:

Just add 40 and 30 and you'll get your answer

Final answer:

To find the value of y, set up an equation where y + (-30) = 40. Solve for y by isolating it on one side of the equation.

Explanation:

To solve this problem, we can set up an equation using the information given. Let's represent the unknown number, which is the sum of y and -30, as x. We can write the equation x = 40. To find the value of x, we'll need to isolate it by performing the opposite operation of adding -30, which is adding 30 to both sides of the equation. This gives us x + 30 = 70. Finally, subtracting 30 from both sides gives us x = 70.

Learn more about Solving equations here:

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Answer: 45%

Step-by-step explanation: To write a fraction as a percent, first remember that a percent is a ratio of a number to 100. If we want to write 9/20 as a percent, we will need to find a fraction equivalent to 9/20 that has a 100 in the denominator. We can do this by setting up a proportion.

=

Now, we can use cross products to find the missing value.

900 = 20n

÷20   ÷20   ← divide by 20 on both sides

  45 = n

Therefore, 9/20 is equal to 45 over 100 or 45%.

___________________________________________________

Answer: 0.45

Step-by-step explanation: In order to write 9/20 as a decimal, we need to find a fraction equivalent to 9/20 with a 100 in the denominator. Notice that if we multiply both the numerator of 9/20 by 5, we get the equivalent fraction 45/100 which we can now write as a decimal. Remember that the hundredths place is two places to the right of the decimal point. So, we can write 45/100 as 0.45.

Therefore, 9/20 is equivalent to 0.45.

The required, 9/20 as a decimal is 0.45, and as a percentage is 45%.

Decimals and percentages are both ways to express numbers that are less than or equal to 1. Decimals are a way to represent numbers using the base-10 numbering system. Percentages, on the other hand, are a way to express a portion of a whole as a fraction of 100.

To convert 9/20 to a decimal, divide the numerator (9) by the denominator (20).

9 ÷ 20 = 0.45

So, 9/20 as a decimal is 0.45.

To convert 0.45 to a percentage, multiply it by 100.

0.45 x 100 = 45

So, 9/20 as a percentage is 45%.

In summary, 9/20 as a decimal is 0.45, and as a percentage is 45%.

Learn more about percentages here:

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