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3 years ago

1. We can use division to solve real life problems, such as:

Mathematics

2 answers:

KonstantinChe [14]3 years ago

8 0

I think the answer is D

iren2701 [21]3 years ago

4 0

Well, let's look at the answer choices.
A) If you want to fond the total cost of two sweaters you would add, not divide. So this isn't it.
B) To find out how much older someone is you would subtract. So this isn't it either.
C) To find out how many desks are needed you would multiply, since you know you need 3 rows of desks with 7 students each (3 x 7). Again, not it.
D) To find out how many pencils each student would get, you'd divide. You would divide 56 by 9. So your answer is D.

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A ball is dropped from a height of 600 feet. The function describing the height of the ball at t seconds after it dropped is <im

bekas [8.4K]

The average velocity of the object after during the first three seconds is: 48m/s

The time at which the instantaneous velocity equals the average velocity within the first three seconds is 1.5 seconds.

<h3>What is instantaneous and average velocities?</h3>

Instantaneous velocity is the speed of an object at a particular point in time.

Average velocity is the velocity of an object after covering a certain distance for a period of time

Analysis:

Given

initial height = 600 feet

Height with respect to time = f(t) = -16 $t^{2}$ + 600

a) Height at t = 0 = 600 feet

Height at t = 3 seconds = f(3) = -16 $(3)^{2}$ + 600 = 456 feet

Distance travelled = 600 - 456 = 144 feet

Average velocity = distance travelled/time taken = 144/3 = 48 feet/seconds

b) instantaneous velocity at time t = $\frac{df(t)}{dt}$ = $\frac{d(-16t^{2} + 600) }{dt}$ = -32t

when instantaneous velocity equal average velocity

-32t = -48

t = 1.5 seconds

In conclusion, the Average velocity after 3 seconds is 48 feet per seconds and the time taken for the average velocity to equal the instantaneous velocity is 1.5 seconds.

Learn more about instantaneous and Average velocity: brainly.com/question/13372043

#SPJ1

7 0

2 years ago

If you have a 12 side die and a 6 side die what is the probrability it lands on 5

umka2103 [35]

Answer:

For the 12 sided one it would be 1/12

For the 6 sided one it would be 1/6

Combine those together and it would be <u>3/12</u> which is equal to <u>1/4</u>

Step-by-step explanation:

5 0

2 years ago

PLEASE HELP ME<br><br><br> Describe the sequence in words:<br> 5,9,13,17,21...

Nady [450]

Answer: an = 4n + 1

Step-by-step explanation:

Use the formula an = a1 + d (n - 1) to identify the sequence

8 0

2 years ago

can someone please help me figure this out? this is a summative and I'm failing for the year. it's algebra 1.

34kurt

Part (a)

x = number of bass caught
y = number of trout caught

x and y are nonnegative whole numbers.

3x represents the total weight of all the bass, since one bass weighs 3 pounds. Similarly, 2y is the total weight of the trout with each one being 2 pounds. Adding up all the weight of all the fish, we get 3x+2y. This is set equal to 34 pounds which is the total stated weight caught.

In short, we end up with the equation 3x+2y = 34

Now onto the second equation. The expression 5x represents how many points Pat gets from catching x bass, because he gets 5 points per bass. Then we subtract off 2y to represent Pat losing 2 points per trout he catches. Overall, his point total is 5x-2y. This is set equal to his point total of 14.

The second equation is 5x-2y = 14

------------

Answer:

3x+2y = 34

5x-2y = 14

Both equations are needed to form this particular system.

===================================================

Part (b)

We could use a number of methods to solve for (x,y). Possibly the most efficient is elimination. Why? Because note how we have 2y up top and -2y down below. They add to 0y which is just 0. The y terms go away, and are eliminated. Afterward, all we're left with is x in which we can solve for just like any other single variable equation. More info is in part (c).

===================================================

Part (c)

Refer to the answer in part (a). We'll add straight down. So that means we have these three sets of addition operations.

3x+5x becomes 8x
2y + (-2y), aka 2y-2y, becomes 0y and the y terms go away
34+14 simplifies to 48

After those three sets of addition operations, we're left with the much simpler equation 8x = 48. To solve this, we divide both sides by 8 and we get x = 6. This says Pat caught 6 bass.

Use this value of x to find y. So we'll plug x = 6 into either equation involving x,y and solve for y

3x+2y = 34

3(6)+2y = 34

18+2y = 34

2y = 34-18

2y = 16

y = 16/2

y = 8

So we can see that Pat caught 8 trout as well.

The check portion is shown in the attached image below. Effectively, all we're doing is replacing x and y with 6 and 8 respectively. Then we're simplifying both sides. Getting the same number on both sides results in a true equation, and therefore verifies we have the correct (x,y) solution.

Solution: (x,y) = (6,8)

Interpretation: Pat caught 6 bass and 8 trout

7 0

3 years ago

What is 4 divided by2/5

Minchanka [31]

Answer:

Step-by-step explanation:

8 0

2 years ago