Mathematics High School

In 1971, the average price of gasoline was $0.36 per gallon. In 2020, the average price of gasoline was $2.32 per gallon. a. What is the percent increase, rounded to the nearest whole number, in the cost of a gallon of gasoline from 1971 to 2020? b. What is the percent decrease, rounded to the nearest whole number, in the cost of a gallon of gasoline from 2020 to 1971? 2. Last year, DeKalb Middle School had 140 7 thgraders. The number of 8 thgraders was 125% of the number of 7 thgraders. How many 8 thgraders were there last year? 3. Find the balance of a savings account at the end of 4 years if the interest earned each year is 5.5%. The principal is $700.

Answers

Answer 1

Answer:

1. a. 544%

b. 84%

2. 175

3. $867.18

Step-by-step explanation:

1. a.2.32-0.36=1.96

1.96/0.36=5.44

5.44*100=544

b. 1.96/2.32=0.84

0.84*100=84

2. let x = # of 7th graders

let y = # of 8th graders

y is 125% of x

y=1.25x

x=140

y=1.25*140

y=175

3. A=P(1+r)^t

A=700(1+0.055)^4

A=867.18

Related Questions

what is the answer for
k + 0 = k

Answers

Answer: k=1 which equals 1k.  

Step-by-step explanation:

k+0=k

k is really 1k

so the real equation is 1k+0=1k because 1k+0 means nothing really it's still 1k.  

Darius and Khadija are learning to play chess. Darius's ratio of wins to losses is 5 to 13. Khadija's ratio of wins to losses is 3 to 9. Who has the better winning record?

Answers

Answer:

Darius

Step-by-step explanation:

Darius has played a total of 18 games so divide that by the five wins and you can see how many wins he would get on average wich is 0.28. Khadija won 3 out of 12 games so he/she has 0.25 average

Jeanne needed to buy 258 yards of fabric, if the ribbon costs 10¢ per foot, what is the total cost of the ribbon in dollars?

Answers

Answer:

Step-by-step explanation:

1 yard is equal to 3 foot

10¢= 1 foot

30¢= 1 yard

30¢ x 258 yards= $77.40

WORTH 58 POINTS HELP MEE PLEASE

Answers

Answer:  

4:1

sorry if i'm wrong

Answer:

Step-by-step explanation:

54 ÷6= 9

the first one is  5:1

then take away 9

45- 9 = 36

36:9 = 4:1

(HELP PLEASE - URGENT)

The elevation of a sea animalis -20 meters.
Choose all elevations that are greater than the elevation of the sea animal.
A. 5 meters
B. -16 meters
C-40 meters
D. O meters
E.-22 meters

Answers

Answer:

5,0 and -16

Step-by-step explanation:

Answer:

A, B, D

Step-by-step explanation:

-20<5

-20<-16

-20>-40

-20<0

-20>-22

What are TWO different ways you know when you are finished dividing?
PLZ HELP I WILL GIVE YOU BRAINLIEST!

Answers

You know you are finished dividing when you can no longer simply & when you plug it back in to check the answer

HELPPPPPPPPPPPPPPP MEEEEEEEEEEEEE

Answers

Answer:

About 4.5 units

Step-by-step explanation:

Please let me know if you want me to add an explanation

INTERESTING EXAMPLE #1: SIMPLE INTEREST
ha Audio Ineho's;
Kyra has been babysitting since 6th grade. She has
saved $1,000 and wants to open an account at the
bank so that she will earn interest on her savings.
Simple Bank pays simple interest at a rate of 10%.
QUESTION: How much money will Kyra have IN
TOTAL after one year, assuming she neither deposits
nor withdraws any money?

Answers

Answer:

3d4cf4tg6g6g5yfrr3

5

Step-by-step explanation:

rc4g5g6g5f4d4f

Answer:

She will have $2,200

Step-by-step explanation:

Im assuming shes getting paid interest every month.

10% of 1,000 is 100

So, when you mulitiply 100 times 12

You get 1,200

You add that to the original amount of savings

And she ends up with $2,200

Find the volume of a cylinder with a radius of 3 cm and a height of 7 cm. Round to the nearest hundredth.

Answers

Answer:

197.82

Step-by-step explanation:

The formula for cylinder volume is

π * r^2 * h

r is radius h is height

3.14 * 3^2*7

3.14 * 9 * 7

28.26*7

197.82

The volume is 197.82

Please help! image is below

Explanation = brainliest

Answers

Answer:

x=67.5ft

Step-by-step explanation:

similarity and congruence

the length of one side of the bigger triangle divided by the length of the similar side of the smaller triangle

equate the unknown ratio with a known ratio

71.5/49.5=97.5/x

x=(97.5 x 49.5)/71.5

x=67.5 ft

Martha rented a sedan at a cost of $21.25 a day for three days. She drove 980 miles at 25 cents a mile. Gas cost $63.45 what was the cost per mile

Answers

Answer:

38 cents per mile

Step-by-step explanation:

Let us first calculate the total expenditure by Martha

= 21.25*3= $ 63.75

Cost of gas  =$ 63.45

Therefore cost per mile = 127.2/980= 0.1297+0.25= $0.3797 or 38 cents per mile

A.42.6 square units
B. 128 square units
C. 32 square units
D. 64 square units

Answers

Answer:

Step-by-step explanation:

D. 64 square units

You started the trail with 1400lbs. of food. You now have 1182lbs. of food. What percentage of your starting amount do you have left?

Answers

Answer:

84.5%

Step-by-step explanation:

1400 - 1182 = 218 You are less 218 lbs. of food.

218 ÷ 1400 = 15.5% You are less 15.5% lbs. of food.

100% - 15.5% = 84.5% You have 84.5% lbs if food left.

Which of the division expressions below has a remainder? Select all that apply.
A) 234 : 4
B) 1,350 = 9
C) 794 : 6
D) 812 : 8
E) 12,416 : 4

Answers

Answer: 8

Step-by-step explanation:

Answer:

A, C, D

Step-by-step explanation:

- 28x + 18 = simplest form

Answers

Answer:

The answer is -2(14x - 9)

Step-by-step explanation:

Hoped this helped!

Sorry if this is wrong.

82- 2to the third power.5 please help!

Answers

Answer:

240

Step-by-step explanation:

82-2= 80 to the third power so just multiply 80 x 3 and you have your answer.

Answer:

512000 (square root of it is 712.5)

Step-by-step explanation:

82 -2 = 80

80^3

= 80*80*80

= 80^3

= 512000 (square root of it is 712.5)

Let me know if this was helpful!!

Simplify the radical: √80

Answers

Answer:

4√5

Step-by-step explanation:

if this isnt the answer u needed lmk!!

Rewrite 80 as its prime factor
Square root (2x2)x(2x2)x5

Group the same prime factors into pairs.
(2x2)x(2x2)x5

Rewrite each pair in exponent form.
2(2) x 2(2) x 5

Use this rule: square root of x(2) = x.

(2x2) square 5

Simplify 4 square 5

Decimal form: 8.944272

4
Functions F and G are both linear functions of x.
Function F: y=0.5x+2
Function G
х
-4
0
3
6
у
3
1.5
1
-0.5
-2
Which of the following statements is true?

Answers

its like ones true then ones false it goes in that pattern

Can someone pls help?!!!?

Answers

Hold on I’m working this problem out

is this exponential growth or decay y=6e^-x​

Answers

Answer: It's always decreasing/decaying.

Step-by-step explanation: To find if it is increasing or decreasing, graph the exponential problem.

1. Start at the top.

2. Look at the exponent.

The exponent is -x. Since negative means opposite/down, it goes down.

Therefore, it's always decaying.

how many perfect squares less than 1000 are divisible by 8. Will pick brainliest if possible!!!!!!!!!!!!!

Answers

Answer:

30 (not including 1 because 1 is not BETWEEN 1 and 1000).

Step-by-step explanation:

what is the answer to 1/2d+6

Answers

Answer:

Step-by-step explanation:

What you gave, is an expression. There is no answer. The only thing that can be done is factor out the 1/2

[tex]\frac{1}{2}(d+12)[/tex]

Quien me puede ayudar es U R G E N T E The GCF of 54, 76 and 114 is: 2 6 4 9 1 The GCF of 35, 50 and 120 is: 2 4 5 25 2 Find the GCF of 12, 16 and 20 1 If the GCF of 56 and 120 is c, find the result of 24\div c24÷c

Answers

Responder:

a) 2

b) 5

c) 4

d) 3

Explicación paso a paso:

Debemos encontrar el MCD de los siguientes números

a) 54, 76, 114

encontrar los factores primos de cada

54 = 2 * 3 * 3 * 3

76 = 2 * 2 * 19

114 = 2 * 2 * 2 * 2 * 3 * 3

De los factores anteriores, podemos ver que solo 2 es común a todos los factores, por lo tanto, el MCD de 54, 76 y 114 es 2

b) Para 35, 50 y 120

35 = 5 * 7

50 = 2 * 5 * 5

120 = 2 * 2 * 2 * 3 * 5

De los factores anteriores, podemos ver que solo 5 es común a todos los factores, por lo tanto, el MCD de 35, 50 y 120 es 5

c) Para 12, 16 y 20

12 = 2 * 2 * 3

16 = 2 * 2 * 2 * 2

20 = 2 * 2 * 5

De los factores anteriores, (2 * 2) es común a todos ellos, por lo tanto, el MCD de 12, 16 y 20 es 4

d) Para 56 y 120

56 = 2 * 2 * 2 * 7 = 8 * 7

120 = 2 * 2 * 2 * 3 * 5 = 8 * 3 * 5

De los factores anteriores, podemos ver que solo 8 es común a todos los factores, por lo tanto, el MCD de 56 y 120 es 8.

Por tanto, c = 8

Necesario

24 / c

= 24/8

= 3

Por tanto, el resultado de 24 / c es 3

Maurice buys a dozen of donuts on sale for $7.99 before tax.
The sales tax is 4%.
What is the total price Maurice pays for the dozen donuts?

Answers

Answer:

$8.30

Step-by-step explanation:

7.99 + 4% = 8.30

What is the solution to the following system of equations:

7x+2y=24
8x+2y=30
​

Answers

Answer:

(6,-9)

Step-by-step explanation:

Answer:

x=6 y=-9

Step-by-step explanation:

2. A nutritionist wants to collect data on how much caffeine the average American drinks per day. She has the following ideas for how she could obtain a sample:
a. Ask the first 20 adults who arrive at a grocery store after 10:00 a.m. about the average amount of caffeine they consume each day.
b. Every 30 minutes, ask the first adult who comes into a coffee shop about the average amount of caffeine they consume each day.​

Answers

Answer:

B

Step-by-step explanation:

If you start to ask after 10:00 am, a lot of people isn't drinking caffeine. And, were trying to figure out the average.

1/4=something 8 plz help me

Answers

Answer:

1/4 = 0.25

Step-by-step explanation:

Answer:

2/8

Step-by-step explanation:

i don't know what to put here but 1/4 is = to 2/8

A man stands on the shore 85m from a light house. When he looks at the top of the
lighthouse, the angle of elevation created is 44.. Calculate how tall the light house is and
explain how you found your answer. *

Answers

Answer:

ai ei tu 7uhg click uddog corruption it v if hug hug yeh uff ye egg

(Solving equations by addition)

Can somebody plz help answer these questions like what to solve it. Thanks :D

WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST

Answers

1.) 11 - 5 = x

x = 6

2.) 4

3.) 5

4.) 7

5.) 5

If angle 10 and angle 15 are congruent, which lines are parallel

Answers

Answer:

Line a is parallel with line b

Step-by-step explanation:

The answer is line A and b.
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