estimate the product of 48 and 7 do you underestimate or overestimate
a. Show that the ratios 10/20 and 30/60 form a proportion by finding a common multiplayer. b. in part (a) are equal by writing them in simplest form.
Final answer:
The ratios 10/20 and 30/60 both simplify to 1/2, showing they form a proportion as they equal the same value when reduced to simplest form.
Explanation:
Proportion is a mathematical concept where two ratios are equivalent.
For example, the ratios 10/20 and 30/60 form a proportion.
We can show this by finding a common multiplier and simplifying the ratios.
10/20 can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 10.
This yields:
10 ÷ 10 = 1 and 20 ÷ 10 = 2. So, 10/20 simplifies to 1/2.
Similarly, 30/60 can be simplified by dividing both the numerator and denominator by 30, resulting in:
30 ÷ 30 = 1 and 60 ÷ 30 = 2. This simplifies to 1/2, the same as the first ratio.
Since both ratios simplify to 1/2, we can say that 10/20 and 30/60 form a proportion because they both equal the same value when reduced to simplest form.
Look at the following problem and solution given by a student: Abel, Belle, and Cindy have $408 altogether. Belle has $7 more than Cindy and $5 more than Abel. How much does Abel have?
the statue of liberty is 305.5 feet tall from the foundation of its pedestal to the top of its torch. Isla is building a model of the statue. the model will be one hundredth times as tall as the actual statue, how tall will the model be?
Answer: 3.055 feet
Step-by-step explanation:
Given : The statue of liberty is 305.5 feet tall from the foundation of its pedestal to the top of its torch.
Its model will be one hundredth times as tall as the actual statue.
Now , One hundredth = [tex]\dfrac{1}{100}=0.01[/tex]
According to the statement,
The height of the model will be = [tex]\dfrac{1}{100}\times\text{Height of original statue}[/tex]
[tex]=\dfrac{1}{100}\times305.5=3.055\text{ feet}[/tex]
Hence, the height of the model will be 3.055 feet.
Help dont ge this, read this word problem..... Rob is saving to buy a new MP3 player. For every $15 he earns babysitting, he saves $6. On Saterday he earned $75 babysitting. How much money did he save?
Joe deposits $50,000.00 in an account that earns 8.3% simple interest. About how many years will it take for his account balance to earn $80,000.00 in interest?
Select the best answer from the choices provided.
About 5 years
About 10 years
About 20 years
About 25 years
Joshua is the place kicker for his college football team. Last season he kicked 42 times and never missed. Each field goal scored 3 points, and each extra point scored 1 point, for a total of 86 points.
How many field goals did Joshua kick?
each car on a commuter train can seat 114 passengers. if the train has 7 cars how many passengers can the train seat?
At a party guests drank 2/3 of the cranberry punch and 5/6 of the orange punch, They drank the same amount of each. How many ounces of each punch might there have been at the start of the party?
To find the starting amounts of cranberry and orange punch, we equate 2/3 of the cranberry punch to 5/6 of the orange punch. After setting up the equation 2/3 * C = 5/6 * O, we can solve for either C or O given a specific amount for one.
Explanation:Understanding Proportional Quantities in Punch
To determine how many ounces of cranberry and orange punch might have been at the start of the party, given that guests drank 2/3 of the cranberry punch and 5/6 of the orange punch, and that they drank the same amount of each, we can set up an equation. Let's label the amount of cranberry punch initially as C ounces and the amount of orange punch initially as O ounces. According to the problem, 2/3 of C is equal to 5/6 of O; therefore:
2/3 * C = 5/6 * O
We can find a common multiple of the denominators 3 and 6 to solve the equation. For simplicity, let's assume that the common multiple is 6. If we multiply both sides of the equation by 6 to get rid of the fractions, we have:
4 * C = 5 * O
This means that the amount of cranberry punch is always 5/4 times the amount of orange punch. For example, if there were 20 ounces of orange punch at the start (O = 20), then there would have been 5/4 * 20 = 25 ounces of cranberry punch (C).
Final answer:
The party guests drank equal amounts of 2/3 of cranberry punch and 5/6 of orange punch. By setting up an equation and choosing a common multiple of the denominators (6), we conclude that one possible starting amount for each type of punch is 18 ounces, demonstrating that whenever x is chosen, y will be equal to x.
Explanation:
The student's question involves solving a problem where two quantities are compared to find out how much of each was present initially. Since the guests drank the same amount of cranberry punch and orange punch, with the proportions being 2/3 and 5/6 respectively, we can set up an equation to solve for the initial amounts.
Let x represent the original amount of cranberry punch and y represent the original amount of orange punch. According to the question:
2/3 of cranberry punch = 5/6 of orange punch
(2/3)x = (5/6)yTo find multiple answers, we could assume a common multiple of both denominators 3 and 6, which is 6. Then, if we let x = 6 and y = 6, we have:
(2/3)×6 = 4(5/6)×6 = 5However, these amounts are not equal. We need to find a value for x and y that, when substituted into the proportion, yields an equal amount for both types of punch. Multiply both sides of the equation by 3/2 to isolate y:
y = (3/2) × (2/3)xy = xNow, we can select any multiple of 6 for x to represent the initial amount. If we choose multiple of 6 such as 18 ounces for x, then y would also be 18 ounces. Thus, the starting amount of both cranberry punch and orange punch could have been 18 ounces each as one of the possible answers.
Tabitha was shooting free throws in gym class. She completed 6 of the shots, which was a third of 5 more than Joan completed. How many shots did Joan complete?
Final answer:
Joan completed 13 free throws. This was determined by solving the equation derived from the information that Tabitha's 6 completed shots were a third of 5 more than Joan's completed shots.
Explanation:
Tabitha completed 6 free throws, which is stated to be a third of 5 more than Joan completed. This means that if J represents the number of shots Joan completed, then 6 is one-third of J plus 5. Therefore, we can express this relationship in an equation: 6 = (J + 5) / 3.
To find out how many shots Joan completed, we solve for J as follows:
Multiply both sides of the equation by 3 to eliminate the fraction: 18 = J + 5.
Subtract 5 from both sides to solve for J: J = 18 - 5.
Calculate the result: J = 13.
Hence, Joan completed 13 free throws.
What is 3 3/4 in decimal form?
what is 12% of 30 HELP I DON'T KNOW THIS QUESTION AT ALL
If carrots were $0.50 less per pound how much would Victoria have paid for 8.5 pounds of carrots
Victoria would have paid $4.25 for 8.5 pounds of carrots if they were $0.50 less per pound.
Explanation:To find out how much Victoria would have paid for 8.5 pounds of carrots if they were $0.50 less per pound, we need to subtract $0.50 from the original price per pound and then multiply it by 8.5.
Let's say the original price per pound of carrots is $1.00. Subtracting $0.50 from it gives us $0.50. Multiplying $0.50 by 8.5 gives us $4.25.
Therefore, Victoria would have paid $4.25 for 8.5 pounds of carrots if they were $0.50 less per pound.
Cody is selling chocolate and white chocolate candy bars for a school fundraiser. 30% of the candy bars sold have been white chocolate. If Cody has sold 24 white chocolate candy bars, how many total candy bars has he sold?
Answer:
80 total candy bars
Step-by-step explanation;
set up proportion
24
30/100
24 x 100=2400 divided by 30
=80
The total number of candy bars that he has sold is 80 candy bars.
Using this formula
Total sold candy bars=Number of candy bars sold/Percentage of candy bar sold
Where:
Number of candy bars sold=24 candy bars
Percentage of candy bar sold=30%
Let plug in the formula
Total sold candy bars =24/0.30
Total sold candy bars=80 candy bars
Inconclusion the total number of candy bars that he has sold is 80 candy bars.
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Please help!! What is the equation of a line in point slope form that passes through (1,-7)
Which fraction is equivalent to 7/9?
A. 14/16
B. 21/24
C. 28/36
D. 56/63
us tradional 289 *13
what is this answer?
Mark drew the following model and said it represented 21÷4 what is 21÷4?
1/7 x 5 5/6 x 1 1/4 =
Msrna is playing a game where you score -5 points each time youo guess the correct answer.The goal is ti get the lowest score.To win the games,Marna must have a score less than -80 points.How many correct answers does marna need to win the game
write a double fact you can use to find the sum 5+4, 6+7, 8+9
Mia is making costumes for a play.Each costume needs 3 7/9 yards of velvet.She is making 6 costumes.About how much velvet does she need?
BRAINLIEST TO THE BEST!!!!!!!!!
Joe has 5/6 pound of bird seed. He needs 1/3 pound to feed the birds daily. How many days’ worth of seed does Joe has left?
Answer:
Do the one that looks like this
here is also a really cute pic
I only need the first one ( 45% of 30) but please keep in mind that I do need help with the other two, but they are optional.
What is 45% of 30?
What is 40% of 175?
What is 20% of 60?
in a science class students water a plant with the same amount of water each day for 28 consecutive days. if students use a total of 23.8 liters of water over the 28 days, how many liters of water did they use each day. how many milliliters did they use each day.
Keywords:
Water, plant, water, liters, daily, milliliters, divide
For this case we must find the amount of liters of water that students used daily, for 28 days, to water a plant, knowing that they used a total of 23.8 liters of water at the end of 28 days. For this, we must divide and the result convert it to milliliters. So:
Let "x" be the number of liters of water that students used per day:
[tex]x = \frac {23.8\ liters} {28\ days}\\x = 0.85\ liters\ per\ day.[/tex]
Thus, the students used 0.85 liters of water per day.
On the other hand, we know that: 1 liter equals 1000 milliliters. Then, by rule of three:
1 L -------------> 1000 mL
0.85L ---------->?
Where "?" represents the amount of daily water watered in milliliters
[tex]? = \frac {0.85 * 1000} {1}\\? = 850\ mL[/tex]
Thus, the students used 850 milliliters of water per day.
Answer:
850 milliliters of water per day.
They use 0.85 liters = 850 mililiters each day.
Further explanationComparison is an effort to compare two or more objects in terms of shape or size, or number
Proportional Comparisons are comparisons of two or more numbers where one number increases, the other numbers also increase
Can be formulated[tex]\frac {x1} {y1} = \frac {x2} {y2}[/tex]
so that if:
x = 2
then
[tex]y = \frac {y} {x} \times \: 2[/tex]
While the reversal value comparison is the comparison of two or more numbers where one number increases, the other number decreases in value
Can be formulated
[tex]\displaystyle \frac {x1} {y2} = \frac {x2} {y1}[/tex]
so that if:
x = 2
then
[tex]\displaystyle y = \frac {x} {y} \times \: 2[/tex]
Knownstudents use a total of 23.8 liters of water over the 28 days
AskedThe amount of water used in a day
AnswerFrom this we can make a comparison:
[tex]28~days=23.8~liters[/tex]
[tex]1~day=x~liter[/tex]
[tex]\displaystyle \frac{1~day}{28~day} =\frac{x~liters}{23.8}[/tex]
[tex]\displaystyle x~=~\frac{1~\times~23.8}{28}[/tex]
x = 0.85 liters
From the unit of volume, we convert liters to milliliters
1 liter = 10³ milliliters
0.85 liters we move the comma 3 units to the right becomes:
[tex]\displaystyle 0.85 = 0~\boxed{,}\rightarrow~8~\rightarrow~5~\rightarrow~0~\boxed{,}[/tex]
= 850 mililiters
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Keywords: water a plant, liters, mililiters,students
Twenty-two people voted for fish as their favorite pet.Three times as many people voted for dogs.How many people voted in all?
Clara estimates that the length Of a hiking trail is 5.75 kilometers. She later learnsthat its Actual length is 6.25 km. What is the percent error in Clara's estimate, to the nearest tenth of a percent?
A. 7.7%
B. 8.0%
C. 11.0%
D. 11.5%
8.0
Hope this helped it probbaly didnt just have a nice day
Final answer:
The percent error in Clara's estimate of the hiking trail length is calculated using the difference between actual and estimated lengths, resulting in an 8.0% error. Option B is correct.
Explanation:
To calculate the percent error in Clara's estimate of the hiking trail's length, we use the formula: percent error = (|Actual length - Estimated length| / Actual length) × 100. Clara estimated the length to be 5.75 km, while the actual length is 6.25 km.
First, calculate the absolute difference between the actual and estimated lengths: |6.25 km - 5.75 km| = 0.5 km.
Then, divide this difference by the actual length: 0.5 km / 6.25 km = 0.08.
Finally, convert this to a percentage by multiplying by 100: 0.08 × 100 = 8.0%.
Therefore, the percent error in Clara's estimate is 8.0%, making option B the correct answer.
What number can be written as 40 plus 5 ?
14. Select ALL the fractions that are equavialiant to 0.7
A. 7/10
B. 70/10
C. 7/100
D. 70/100
E. 10/7
F. 100/7
15. Select all true Comparasions for 7.5 and 3.95
A. 7.5 < 3.95
B. 3.95 < 7.5
C. 7.5 = 3.95
D. 7.5 > 3.95
E. 3.95 > 7.5
which fraction is not equivalent to the others? a.3/15 b.2/10 c.1/5 d.9/45 e.10/50 f.6/40 g.7/35 h.100/500