Mathematics Middle School

At noon, a hot-air balloon was at an elevation of 2,400 feet. One hour later it was at an elevation of 1,700 feet.
a. write a numerical expression you can use to find the change in altitude from noon to 1 p.m
b. evaluate your expression and explain what it means

Answers

Answer 1

Answer:

a.2,400-1700=

b. 700: the hot air balloon decreased height by 700 feet

Related Questions

Solve the equation.

x+4/5=3 8/15

Answers

Answer:

x = 2.73

Step-by-step explanation:

Heres what you put if it says show your work :)

x + 4/5 = 3 8/15

  - 4/5   - 4/5

____________

       x = 2.73

q-6 6/7 =9 3/7
Solve using mental math

Answers

Answer:

q= 16 4/21

Step-by-step explanation:

Solve for q by simplifying both sides of the equation, then isolating the variable.

HURRY PLEASE The amount of tax for each camera is $5.25 and the tax rate is 6%. Explain how the equation: (Original Cost)(Percent) = Tax Amount is adjusted to solve for the original cost.
​

Answers

Answer:

$3.15 is the orignal price

Step-by-step explanation:

Answer:Sample Response: The equation is adjusted by dividing the tax amount by the percent to find the original cost. Dividing by the percent is the inverse operation of multiplying by percent.

Step-by-step explanation:

sorry this is late, I just wanted to put the answer for other people.

Tell whether the events are
independent or dependent. Explain.
1.
You spin a spinner twice.
First Spin: You spin a 2.
Second Spin: You spin an odd number.
2.
Your committee is voting on the leadership team.
First Vote: You vote for a president. Second Vote: You vote for a vice president.
You spin the spinner and flip a coin. Find the
probability of the independent events both
occurring.
3.
Spinning an odd number
and flipping heads
4.
Not
spinning a 5 and flipping tails
You randomly choose one of the tiles. Without replacing the first tile, you
choose a second tile. Find the probability of the dependent event(s) both
occurring.
5.
Choosing a 6 and then a prime number
6.
Choosing two odd numbers
7.
You randomly pull two bills
from your wallet. What is
the probability they are
both $20?
You roll a number cube twice. Find the probability of the compound event.
8.
Rolling two numbers whose sum is 2
9.
Rolling an even number and then an odd number

Answers

Answer:

Step-by-step explanation:

1) Independent

2) Depented

3) 3/10

4) 2/5

A cookie recipe calls for 2.5 cups of raisins in order to make 2 dozen
cookies. How many cups of raisins would be needed to make 72 cookies?

Answers

Answer:7

Step-by-step explanation:

U have to simplfly the thing

Answer:

7.5

Step-by-step explanation:

72 is six dozen, took 2.5 and multiplied it by 3 and got 7.5. Please mark brainliest!!!!!!! And have a good day!

Which scatterplot does NOT suggest a linear relationship between x and y?

Answer:
Explain:

Answers

I believe it is J because a linear relationship between x and y are like a straight line and J isn't constant.

j because it isn’t constant

An apple costs $0.08. How much would 2 dozen apples cost?

a
$16
b
$0.92
c
$1.92
d
$.0.016

Answers

the answer is c, $1.92 .

if you multiply 0.08 by 24, you get that answer.

Answer:C

Step-by-step explanation:

8(cent) x24(2 dozen)

Solve the graph for x and y

Answers

Let's solve for x.

y

=

3

5

x

−

1

Step 1: Flip the equation.

3

5

x

−

1

=

y

Step 2: Add 1 to both sides.

3

5

x

−

1

+

1

=

y

+

1

3

5

x

=

y

+

1

Step 3: Divide both sides by 3/5.

3

5

x

3

5

=

y

+

1

3

5

x

=

5

y

+

5

3

Answer:

x

=

5

y

+

5

3

x= 5y+ 53

hope this helps!

Write each phrase or sentence as an algebraic expression or equation. DO NOT use a calculator. Do not write an inequality.

1. 6 more than y

2. times a number

3. 5 less than the product of 10 and c

4. 14 more than 6 times t

5.The sum of x and y is 18

6. A number minus 12 is 7

Answers

Answer:

done

Step-by-step explanation:

1.y+6

2.x

3.10+c-5

4.14+6t

5.x+y=18

6.-12=7

Cole took a total of 36 quizzes over the course of 4 weeks. How many weeks of school will Cole have to attend this quarter before he will have taken a total of 45 quizzes? Assume the relationship is directly proportional.

Answers

Answer: 5 weeks

Step-by-step explanation: 36 / 4 = 9. This means in 1 week he finishes 9 quizzes. 9 x 5 = 45, therefore it would take him 5 weeks to finish 45 quizzes.

It should be 5 weeks

Trying to do some work quickly and I'm stuck on a problem. Here is the question: There are 20 pieces of fruit in a bowl and 8 of them are apples. What percentage of the pieces of fruit in the bowl are apples?

Answers

Answer:

40%

Step-by-step explanation:

Answer:

40%

Step-by-step explanation:

8/20=0.4000

0.4000*100=40%

(20 x 40.00)/100 = 8

(-5)^-4 Write it as a positive exponent

Answers

1/(-5)^4 that’s a fraction btw

Answer:

625

Step-by-step explanation:

-5 x -5 = 25 and -5 x -5 = 25.

Then you would take 25 x 25, which is 625.

This would normally be negative, but the exponent is also negative, and negative times another negative cancels each other out.

Jerry bought 5 candy bars for $14.75. If the king size candy bars cost $3.75 and a regular size candy bar cost $1.75 , how many of each candy bar did he buy? One equation looks like:
3.75x+1.75y=14.75
Find the other equation and solve the system.

Answers

Answer:

3=x 2=y

Step-by-step explanation:

Hope it's right sorry if not hun.

Answer:

3=x 2=y

Step-by-step explanation:

x+y=5

y=5x

plug that in and redo it for x

you must write two sepreate equations

30.28 kg of beef were placed into 24 packages of equal weight. What is the weight of one package of beef? Please show your work.


Please answer as soon as possible

Answers

Answer:

1.26kg per package

Step-by-step explanation:

30.28/24= 1.2616...

Fill in the blanks please and thank you with the correct answers.

Answers

Answer:

sorry i don't get this can you explain your lesson a little more please??

Step-by-step explanation:

List four guidelines for selecting ski boots that fit properly.

Answers

Determine your level and type of skiing To choose a ski boot perfectly suited to your foot, it is important to know your level and the type of skiing. ...Determine the flex of your bootSelect the width of your bootChoose the ski boot size

give the other guy brainly pls

10% of the world’s population is left-handed. If there are 7,400,000,000 people on the planet, how many are left-handed and how many are right handed?

Answers

Answer:

740,000,000 people are left handed and around 666,000,000 people are right handed.

Step-by-step explanation:

I think this is the correct answer. Hope I helped!

740,000,000 left handed people
6,660,000,000 right handed people
Steps:
10% is equal to 0.1
7,400,000,000 multiplied by 0.1
Equals 740,000,000 left handed
Total amount of people subtract left handed people equal right handed people
7,400,000,000 - 740,000,000 = 6,660,000,000 right handed people

Which expression would be easier to simplify if you used the commutative property to change the order of the numbers?

A. 1/3 + 2/3 + (-1/4)
B. -10 + (-20) + 1/2
C. 30 + (-12) + 70
D. 60 + 40 + (-25)

Answers

Answer:

d

Step-by-step explanation:

well i think that is the answer

It’s d (I think but I’m pretty sure)

[PICTURE ATTACHED]

help please >w<

i’ll mark whoever gets it right first

Answers

Answer:

99.75 square feet.

Step-by-step explanation:

First we would find the area of both shapes.

rear = 12.5

distance from back and front is 9.5.

to find the area of the rectangle, you'll need to do 12.5 x 9.5

= 118.75.

Then you'd find the area of the triangles;

BH/2.

4 x 9.5. = 38. divided by 2,

= 19.

than you subtract them,

118.75 - 19 = 99.75.

I hope this helps :)....

damm I wasn’t the first bruh moment

What symbol makes this statement true?

5 ___ - 6

A
<

B
≥

C
>

D
≤

Answers

the symbol that would make it true would be >

Answer:

C

5 > (- 6)

Step-by-step explanation:

Five is greater than negative six.

round 4.2 to the nearest whole number

Answers

Answer:4

Step-by-step explanation: 2 tenths is closer to 4 than it is to 5. Therefore, the answer is 4. If the number were 4.8, it would be 5 because it’s closer to 5.

please help i dont under stand this

Answers

Answer:

You have to times 4 by that number then you get the answer

Step-by-step explanation:

I think so

Answer:

Try adding 2 each time or multiplying 8 by 2 each time

what is 99-1 will give brainliest

Answers

Answer:

98

Step-by-step explanation:

hope i helped you

Answer:

98 Hope it will be helpful. If yes than pls ❤️

Step-by-step explanation:

99-1

=98

Write an equation in point-slope form for the line that passes through each point.
(-2, 11), vertical line

Answers

Answer:

You can't make a point=slope form equation.

Step-by-step explanation:

The vertical line would be parallel to y- axis, hence its equation would be x= c . The slope of the vertical line is undefined, therefore there is no point slope form as such.

y-11=0(x+2)

y-11=0

y=11

Please help tysmmmmmmmmmmmmm

Answers

Answer:

C

Step-by-step explanation:

Its c because a polygon is a shape with all the sides closed and a hexagon is a six sided shape

1.) In a the heavy weight division boxing match, Mike throws 270 punches in 9 rounds. What is the unit rate of punches per round by Mike?

Answers

30 punches each round...
i think :)
just divide the punches by the rounds hope this helps

find the difference when 3x^2 -4x +12 is subtracted from -5x^2 +8x-13

Answers

The answer is 3x^2 +4x+24

Miranda has been offered two jobs. The pay at job A would be $750 per month plus 15% of the value of the merchandise she sells. Job B offers $675 per month plus 20% of the value of the merchandise she sells. What value of merchandise must she sell in order to make more money at job B than job A? Which of the following best represents this situation?



A. 750 + 0.15x = 675 + 0.20x

B. 750 + 0.20x = 675 + 0.15x

C. 750 + 0.15x > 675 + 0.20x

D. 750 + 0.15x < 675 + 0.20x

Answers

it’s C i think cause it’s saying it offers $675 more so > is the more sign

Answer:

x - would be the total value of merchandise sold

y - would be her take home pay would be

Job A: y = 0.15x + 750

Job B: y = 0.20x + 675

We want to know when job B's pay will be larger than job A's pay. So set the expression for job B larger than job A, solve for x

0.20x + 675 > 0.15x + 750

0.20x - 0.15x > 750 - 675

0.05x > 75

x > 75/0.05

x > 1500

Miranda must sell more than $1500 worth of merchandise to have

C would be your best answer, correct me if i am wrong.

Step-by-step explanation:

Please Helpp Mee! I need it NOW!

Answers

Answer:1st one 2nd one and 8th

Step-by-step explanation:

-14,-16,10 i may be wrong sorry!♡︎♡︎

What does negative 5 over 2 < −1 indicate about the positions of negative 5 over 2 and −1 on the number line? (1 point)

A. negative 5 over 2 is located on the left of 0 and −1 is located on the right of 0
B. negative 5 over 2 is located on the right of 0 and −1 is located on the left of 0
C. negative 5 over 2 is located on the left of −1
D. negative 5 over 2 is located on the right of −1

Answers

Answer:

D

Step-by-step explanation:

This indicates that 5/2 is less than -1 on the number line.

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