Answer: Ratios form a proportion if they are equal when cross-multiplied.
1/4 and 3/12
Cross-multiply these ratios to compare them: 1/4 * 12 = 3, 3/12 * 4 = 3.
So they are equal and form a proportion.
54/10; 81/15
Cross-multiply these ratios to compare them: 54/10 * 15 = 81, 81/15 * 10 = 54.
So they are equal and form a proportion.
18/24; 15/20
Cross-multiply these ratios to compare them: 18/24 * 20 = 15, 15/20 * 24 = 18.
So they are equal and form a proportion.
Hence, all the ratios mentioned above form a proportion.
Step-by-step explanation:
To make iced coffee, Sara puts her hot coffee into a refrigerator when it’s temperature is at 130 ℉ . The temperature of the coffee drops 4 ½ ℉ each hour. What is the temperature of the coffee after 5 hours?
PLEASE HELP I’M CONFUSED
Can anyone help with this, its the last question lol
Answer:
30
Step-by-step explanation:
5 x 6 = 30
Can I please have help with this
4x+2+2x+10 = 90
6x + 12 = 90
x = 90-12/6
= x = 13
MARK ME AS BRAINLIEST
Answer:
x= 13
Step-by-step explanation:
4x+2+2x+10=90
collect like terms
4x+2x+10+2=90
6x+12=90
collect like terms again
move 12 to the other side then the sign will change to minus -
6x=90-12
6x=78
divide both sides by 6
6x/6=78/6
x=13
write answers only pleaseeeeeeeeeeeeeeeeeeeeeeee fasttttttttt
Answer:
4(x-1)+9=17 answer only
CAN SOMEONE HELP ME PLEASE
Answer:5 over 8 hope this helps you.
Step-by-step explanation:
Help plssss.........
Answer: He has made $72 this week
Step-by-step explanation:
We can set up the equation of Y = 9x where Y is how much he made and X is how many hours he worked.
We can simply plug in 8 hours for x to get Y=9(8) where Y=72.
Pls help- with this homework question..
Raise a to the 2nd power, then find the difference of the result and 9.
HELP! i only need the 2 middle ones (the ones that are stared)!
PlEaSe HeLp WiLl MaRk BrAinLiEst
ASAPPPPPPPPP
Answer:
Category A 3 1 8
Category B 3 2 1
Step-by-step explanation:
The relative frequency of the columns are:
Group 1 Group 2 Group 3
Category 1 4/11 1/4 11/19
Category 2 7/11 3/4 8/19.
What is the frequency?
The number of times a specific value appears in the data is its frequency (f). A variable's distribution is its frequency pattern, or the collection of all conceivable values and the frequencies corresponding to those values. Frequency tables or charts are used to represent frequency distributions.
Given table is
Group 1 Group 2 Group 3
Category 1 4 3 11
Category 2 7 9 8
The frequency of group 1 is (4+7) = 11
The frequency of group 2 is (3+9) = 12
The frequency of group 3 is (11+8) = 19.
The relative frequency is the ratio between the number of times an outcome value appears in the set of all outcomes and the total number of outcomes.
Group 1 Group 2 Group 3
Category 1 4/11 3/12 = 1/4 11/19
Category 2 7/11 9/12 = 3/4 8/19.
To learn more about relative frequency, click on the below link:
https://brainly.com/question/12787846
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Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
The coordinate plane shows the positions of different places in a town. Each unit on the graph is equal to 1 block. Match the paths with their distances.
13 blocks
9 blocks
7 blocks
16 blocks
10 blocks
from school to the supermarket
from the park to the supermarket
to the baseball field
from home to the baseball field
from home to the park
to the supermarket
Answer:
a) 7 blocks
b) 16
c) 10
d) 13
What is the value of x in this triangle? What is the value of each angle?
Answer:
x=17
Step-by-step explanation:
we know the 25 + 90 = 115 so we need the other one to make it 180 degrees.
180-115= 65
so we need 65 more degrees to get 180
now 3x + 11= 65 first step subtract 11 on both sides
you now get 3x = 54 then 2nd step is divide 3 on both sides
and now you get x=17 so
Answer:
Step-by-step explanation:
The entire value of the triangle is 180 degrees.
If you subtract 25 from 180 you are left with 155
Then Subtract 90 from 155 which will leave you with 65
Go on to subtract 11 from 65 having to be with 54 degrees left
Finally you will dived 54 by 3 and you are left with 18
3 x 18 = 54
54 + 11 = 65
Therefore x will equal to 65 degrees
1 of many ALEKS questions
(screenshot)
Please help with this question
Answer:
-look below!
Step-by-step explanation:
equation: s=3+4 s=sister
process: you would add 3 to 4 which is 7, the age of Raymond’s sister.
Raymond’s sister is 7 years old.
HELP ME PLEASE W/QUESTION
Answer:No matter what, the wind doesn't go to the volcanic areas.
Step-by-step explanation: notice that no matter what time, the wind never goes near the volcanoes. thats because the heat is pushing it away.
HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP
Part I-Selected Response
1. CJ wrote several pairs of values that he
thought were equivalent. Which of his
equations are correct? Circle all that apply.
A. 1.25-125%. B. 0.03-30%
C. 0.001 - 1% D.
E. -50%
2. What is 30% of 60?
A. 18
B. 20
C. 24
D. 30
B. 0.03-30%
D. -60%
F.
D. 200
3. Six is 3% of what number?
A. 0.18
B. 2
C. 18
4. What percent of 40 is 60?
A. 20%
B. 50%
C. 67%
D. 150%
5. What is the percent decrease from 20 to
16?
A. 4%
B. 20%
C. 25%
D. 125%
6. Last year, 15 dogs entered the local dog
show. This year, 20 entered. What is the
percent increase?
A. 20%
B. 25%
C. 33%
D. 75%
7. Roe bought a video game in Miami. The
game was $30. Miami has a 7% sales tax.
How much money did Roe pay for the video
game including sales tax?
A. $32.10
B. $33.50
C. $37.00
D. $51.00
8.Lia bought a new jacket. The original price
of the jacket was $48 but it was on sale for
15% off. For numbers 8a-8d, determine
whether each statement about Lia's
purchase is true or false.
8a. Lia paid more than $48
for the jacket.
8b. The discount was $7.20.
8c. Lia paid $40.80 for the
jacket.
8d. Lia paid $55.20 for the
jacket.
8a. TRUE FALSE
8b. TRUE FALSE
8c. TRUE FALSE
8d. TRUE FALSE
Kala needs to buy some pencils. Brand A has a pack of 28
pencils for $4.19
. Brand B has a pack of 72
pencils for $9.12
.Find the unit price for each brand. Then state which brand is the better buy based on the unit price.
Round your answers to the nearest cent.
Answer: The brand should would want to pick is brand A.
Step-by-step explanation: Okay, first you divide 28 by $4.19. Then, divide brand B (72 divided by $9.12). Brand A- 6.68 | Brand B- 7.89.
Select all ratios equivalent to 16:4 A. 12:3 B. 24:6 C. 48:12
Answer:
A, B, and C are correct.
Step-by-step explanation:
16:4 is equal to 4:1 when fully simplified
12:3 is equal to 4:1 when fully simplified
24:6 is equal to 4:1 when fully simplified
48:12 is equal to 4:1 when fully simplified
All of the answers are correct as they are all equivalent to 4:1
Answer: C. 48:12 and B. 24:6
Step-by-step explanation:
48:12 16x3=48 4x3=12
24:6 16x1.5=24 4x1.5=6
equivalent ratios are when two or more ratios express the same relation or comparison of numbers are known as equivalent ratios.
Explain how the percent equation relates proportional quantities
the percent equation being
PART = PERCENT * WHOLE
Answer: This is the best I could find for you
Step-by-step explanation:
"When the ratio of part to whole is equal to the ratio of a percent to 100, shows a percent equal to an equivalent ratio, we call it a percent proportion. A percentage is a fraction expressed with 100 as the denominator. When two ratios are equal, they are said to be in proportion."
When the ratio of part to whole is equivalent to the ratio of a percent to 100, shows a percent equal to an equivalent ratio, we call it a percent proportion. A percentage is a fraction expressed with 100 as the denominator. When two ratios are equal, they are said to be in proportion.
Hope this helps :)
Which proportional relationship has the greatest rate of change?
Answer:
Maybe C because 0 is equal to 0 and 2 is equal to 8 so they are multiplying each number by 4
(465+235+286)-89 equals?
Answer: 897
Step-by-step explanation:
(465+235+286)-89= ?
(700 + 286)-89
986-89
897
The manager of fast food restaurant collected data to study the relationship between the number of employees working registers and the amount of time customers waited in line to order. He made a scatter plot of the data and credited a trend line with the equation y= -70x+300, where y is the total amount of time waited in seconds and x is the number of employees working registers.
1. Did the scatter plot of data positive, negative, or no association? Explain your reasoning.
2. Maria went to the restaurant and waited 90 seconds to place her order. Use the trend line equation to predict how many employees were working.
3. Kiara went to the restaurant and waited 3.5 minutes. Use the trend line to predict how many employees are working.
4. Ashton walked into the restaurant and 4 employees are working registers. Use the trend line equation to predict how long he will wait to place his order.
Answer:
Step-by-step explanation: "no association because depending on how many people are working and how many people are coming in at the same tome"
The average daily temperature in a city is 55° in May. The average daily temperature in that same city is −3° in December. Which of the following represents the difference in degrees of these average temperatures? |55| − |−3| = 52° |55| + |−3| = 58° 55|−3| = 52° |−55| − |−3| = 58°
Answer:
-3°
Step-by-step explanation:
Similar figures review 2
Answer:
a) 48.28 inches
b) 12.5
c) 7.2 cm
d) 16
Hope It Helps!
Please Mark Me Brainliest!
a) 48.28 inches
b) 12.5
c) 7.2 cm
d) 16
A theater sold 85% of the tickets for a
play. If 170 tickets were sold, how many
tickets were originally put up for sale?
Answer:
200 tickets.
Step-by-step explanation:
85% = 85/100 = 0.85
170/0.85 = 200
= 200
Check:
200*0.85 = 170
Answer: hope this helps ♡
200 tickets were originally put up for sale.
Step-by-step explanation:
85% = 170
(we divide 85 and 170 by 85)
1% = 2
(now multiply 1 and 2 by 100)
100% = 200
(double check: 85% from 200 → (85×200) ÷ 100 = 170 ✓)
PLEASE HELP! I WILL GIVE BRAINLY ALSO SUMMARIZE!! (if u troll ill report!)
A sports medicine major wanted to conduct an experiment to determine if there is a correlation between the members of the soccer team's leg strength and the time it takes for them to sprint 40 yards. He sets up the following test and records the data:
The time for 22 leg-press reps is 11.9 seconds.
Step-by-step explanation:The lines of best fit is the trend line of the dataset.
The equation of line of best fit is y = 0.120x + 9.274The time for 22 leg-press reps is 11.9 seconds(A) The equation of the line of best fitThe table is given as —
(x) : 12 32 7 26 28 15 1
(y) : 8.6 14.6 7.1 8.3 11.9 19.4 9.5
To determine the equation of line of best fit, we make use of a regression calculator.
Enter the above dataset in a regression calculator, the equation is: y = 0.120x + 9.274 (Approximated to Three Decimal Places / Rounded of to the Thousandths Place)
(B) The number of seconds for 22 leg-press repsThis means that x = 22.
So, we have:
y = 0.120 * 22 + 9.274
= 2.640 + 9.274
= 11.914
(Approximate to the nearest hundredths)
= 11.9
Hence, the time for 22 leg-press reps is 11.9 seconds.
Hope my answer helps you.
:)
Please mark my answer as the BRAINLIEST. Plssssssssssssssssssss
Which equation represents the graph?
A: y equals negative 2 x plus one half
B: y equals negative one-half x plus one half
C: y = −2x − 2
D: y equals negative one-half x minus 2
Answer:
D: y equals negative one-half x minus 2
Step-by-step explanation:
slope
helpppppppppp fastttttttttttttttttttttttttt
Answer: 8 x 6
Step-by-step explanation 8 x 6
because both integers meet at 8 horizontally, ND 6 VERTICALLY. THEREFORE THE ANSWER IS 8 X 6
* 5 STARS + 20 PTS + THANKS * please answer the question below ASAP!
Answer:
V = 8000in^3
Step-by-step explanation:
Replace s with 20 and solve the equation
V = 20^3
Calculate 20 to the power of 3 and get 8000.
V=8000
the perimeter should be 12 cm right?
Answer: I'm pretty sure
Step-by-step explanation: