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3 years ago

Help me I’m in a rush!!

Mathematics

1 answer:

Komok [63]3 years ago

4 0

21. Find the unit rate ($ per fl oz). Compare the two prices.

22. Multiply 2 3/5 by 7, and 5 3/4 by 4. Add those together and get the answer.

Hope that helps!

You might be interested in

this two different two different ways to find the value of the expression 5.4 * 117 * 100 that do not require you to First multi

blondinia [14]

You can first do the multiplication 117* 100 (=11700) or

54 * 100 = 5400

4 0

3 years ago

A bird leaves its nest and travels 20 miles per hour downwind for x hours. On the return trip, the bird travels 4 miles per hour

Reil [10]

Answer:

The correct answers are:

A) 60 miles; and B) 3.375 hours.

Explanation:

We will use the equation d = rt for this.

For the first leg of the trip, the bird travels 20 miles per hour for x hours. This gives us the equation

d = 20x

For the return trip, the bird travels 4 miles per hour slower, so 20-4 = 16 miles per hour. He also travels 6 miles less than the return distance, for x hours:

d-6 = 16x

To isolate d, we will add 6 to each side:

d-6+6 = 16x+6

d = 16x+6

We will set the two equations equal to one another, since they both equal d:

20x = 16x+6

Subtract 16x from each side:

20x-16x = 16x+6-16x

4x = 6

Divide both sides by 4:

4x/4 = 6/4

x = 1.5

He travels for 1.5 hours both times.

The first time, 1.5 hours at 20 miles per hour is:

d = 1.5(20) = 30 miles

The original trip is 30 miles. This makes the entire trip 30(2) = 60 miles.

On the return trip, he travels 30-6 = 24 miles at 16 miles per hour:

24 = 16x

Divide both sides by 16:

24/16 = 16x/16

1.5 = x

If he goes 24 miles in 1.5 hours at 16 miles per hour, we can use a proportion to find the time it takes for the entire return trip:

24/1.5 = 30/x

Cross multiplying,

24*x = 1.5(30)

24x = 45

24x/24 = 45/24

x = 1.875

This gives him a total time of 1.5+1.875 = 3.375 hours

Step-by-step explanation:

7 0

3 years ago

A student measures the diameter of a small cylindrical object and gets the following readings: 4.32, 4.35, 4.31, 4.36, 4.37, 4.3

Keith_Richards [23]

Answer:

The average of the diameter readings is 4.34 cm.

Step-by-step explanation:

We are given the following data set(cm):

4.32, 4.35, 4.31, 4.36, 4.37, 4.34

Formula:

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{26.05}{6} = 4.34167 \approx 4.34$

Thus, the average of the diameter readings is 4.34 cm.

8 0

4 years ago

Over the summer, for every 12 okra seeds Dana planted, 7 grew into plants. If he planted 120 okra seeds, how many grew into plan

Ipatiy [6.2K]

The answer is 70 because

6 0

4 years ago

Natalle is a softball coach. She has a pitching private lesson with Kasey. Kasey's mom pays Natalle $11 per hour plus a $6 tip.

kirill [66]

$11t\text{ + 6 = 39}$

where t is the number of hours worked by Natalle

Here, we want to write an equation that will represent the given scenario

Let the number of hours for which she earned the pay be t

From the question, she earns $11 per hour

So for t hours, the amount earned excluding the tip will be;

$(11\times t)\text{ = \$11t}$

Now, let us add the tip and equate to the total amount earned

We have this as;

$11t\text{ + 6 = 39}$

3 0

1 year ago