I need help with this please

I Need Help With This Please

Answers

Answer 1
The answer to 8a. is 17, the answer to 8b. is 3.9, the answer to 8c. is 1 / 2, the answer to 8d. is 7 7 / 8, the answer to 9a. is commutative property, the answer to 9b. is multiplicative identity property, the answer to 9c. is associative property, and the answer to 9d. is additive inverse property.

Regarding the whole "explain using mental math" thing, I pretty much just used the fact that 8a. and 8b. both had the same number of decimal places. For 8c., I just made each number have a denominator of 10. And last, for 8d., all of the denominators were already the same, which made it pretty easy. I apologize for this section of my answer being so informal lol, I haven't had to do these kinds of problems in like 5 years

Related Questions

please help me with a multiple choice question

Answers

The answer to this question is 7/10 because 3 out of 10 marbles are green so the rest is a different color.
There are 10 marbles total, 7 of which aren't green

Which statement correctly describes the relationship between △ABC and △A′B′C′ ?

a . △ABC is congruent to △A′B′C′ because you can map △ABC to △A′B′C′ using a reflection across the y-axis, which is a rigid motion.

b . △ABC is not congruent to △A′B′C′ because there is no sequence of rigid motions that maps △ABC to △A′B′C′.

c . △ABC is congruent to △A′B′C′ because you can map △ABC to △A′B′C′ using a translation 6 units to the left, which is a rigid motion.

d . △ABC is congruent to △A′B′C′ because you can map △ABC to △A′B′C′ using a translation 6 units to the right, which is a rigid motion.

Answers

answer is 

c . △ABC is congruent to △A′B′C′ because you can map △ABC to △A′B′C′ using a translation 6 units to the left, which is a rigid motion.

Left and right motion indicates change in x-value.

If we subtract 6 from the x-coordinate of each point,

A(3, 4) will be transferred to A'(3-6, 4) = A'(-3, 4).

B(4, 0) will be transferred to B'(4-6, 0) = B'(-2, 0).

C(2, 1) will be transferred to C'(2-6, 1) = C'(-4, 1).

Hence, the correct option is c. Δ ABC is congruent to Δ A'B'C' because you can mapΔ ABC to Δ A'B'C' using a translation 6 units to the left, which is a rigid motion.

find two consecutive odd integers such that 44 more than the lesser is three times the greater

Answers

n-2 + 40= 3n
2n = 38
n=19
17&19

Final answer:

To find the two consecutive odd integers, we set up the equation n + 44 = 3(n + 2), where n is the lesser integer. Solving the equation gives us n = 19, so the integers are 19 and 21.

Explanation:

The question asks to find two consecutive odd integers such that 44 more than the lesser is three times the greater. Let's denote the lesser integer as n and the greater as n + 2, as consecutive odd integers differ by 2. We can set up the following equation based on the given information: n + 44 = 3(n + 2).

Now, we solve for n:

n + 44 = 3n + 6

Subtract n from both sides: 44 = 2n + 6

Subtract 6 from both sides: 38 = 2n

Divide both sides by 2: 19 = n

Therefore, the lesser integer is 19, and the greater integer is 19 + 2 = 21.

The expression 50w + 400 represents the amount of money Jenny has in her savings account after an unknown number of weeks. How much money does Jenny originally have in her savings account? Which part of the equation represents the amount of money she will put away each week? Explain your answers.

Answers

according to the question Jenny First has $400 in her bank account. then every week she adds $50.  hope I helped :)
jenny originally has 400 dollars in her savings account. 50w represents that she will put away 50 dollars per week since there is a variable attacked to the 50 indicating the weeks.

Simplest form of 7/9 x 21/10

Answers

7/9 times 21/10 can become 7/3 times 7/10 which is 49/30 which is 1 19/30 at it's most reduced form since 19 is prime.
There’s app will help you every math problem

∠C
and ​
∠D
​ are vertical angles with 
m∠C=−2x+90
and 
m∠D=x−30
.
 
What is
m∠D
?

Answers

I’m asking the same question please help us!!! Thank you

m∠C=m∠Dx=−3x+804x=80x=20

m∠C=x∘=20∘

How are points graphed on a coordinate plane?

Answers

Points are graphed on a coordinate plane by placing a dot on a location on a graph.
Points are graphed like this: if you had the ordered pair (2,3), first you would go to the Y axis (vertical), then move to the 3 on the X Axis (horizontal) from where the 2 is.

I need help plz 11 only plz

Answers

Answer is x= -2.2
10x+8=5x-3
       -8       -8
10x=5x-3-8
10x=5x-11
-5x  -5x
5x=-11
÷5    ÷5
x= -2.2

10x+8=5x-3

subtact 5x from both sides 5x+8=-3 then subtract 8 from both sides 5x=-11 then divide 5 from both sides 5x/5x=-11/5. answer x=-11/5

name the property of multiplication by the equation 17x × 1= 17x

Answers

Multiplicative Identity Property
The product of any number and 1 is the number itself

Final answer:

The equation 17x × 1 = 17x illustrates the Identity Property of Multiplication, indicating that multiplying by one does not change the value of a number.

Explanation:

The equation 17x × 1 = 17x demonstrates the Identity Property of Multiplication. This property states that when any number is multiplied by one, the result is the original number. It's called the identity property because one is the identity element for multiplication. Multiplication or division by the same number on both sides of an equation will not change the equality. Therefore, multiplying by one does not alter the value of the quantity.

For example, the equation could also be expressed as 1 × 17x = 17x, showcasing the Commutative Property of Multiplication, which allows us to change the order of the factors without changing the product. However, the main focus here is the identity property, as the number stays the same after multiplication by one.

kok yang's mass is 2/7 of Melvin's mass. Express Melvin's mass as a fraction of Kok yang's mass? What is the ratio of Kok Yang's mass to Melvin's mass?What is the ratioof Melvin's mass to the total mass?

Answers

We start out with the only information we have – Kok Yang’s mass (k) expressed as a fraction of Melvin’s (m): k=2/7m In order to express Melvin’s mass as a fraction of Kok Yang’s, we need to find what m is equal at – and the easiest way to do this would be to remove anything but m from that side of the equation. Now, since we can add new operations to an existing equation – the only requirement is that we have to add the same operation to both of its sides -, we’ll just divide both of them by 2/7: k/(2/7)=(2/7)/(2/7)m (k/1)/(2/7)=1*m (7*k)/1*2=1*m 7/2k=m, thus only leaving m on its side, and showing what it’s equal at on the other. Melvin’s mass is 7/2 of Kok Yang’s. The ratio of Kok Yang’s mass to Melvin’s mass can be expressed as k:m or k/m, and can be derived in a similar manner and using the same equation as above: k=2/7m, except that this time we need to find what k/m is equal at. The easiest way to do this would be to once again add a new operation to both sides of the equation – this time, dividing them by m: k/m=2/7(m/m) k/m=2/7 The ratio of Kok Yang’s mass to Melvin’s is 2 to 7. The ratio of Melvin’s mass to the total mass (k+m) can be expressed as m:(k+m) or m/(k+m), and can be calculated by using one of the equations above. Since we’re looking for ratio of Melvin’s mass to something, let’s choose to use m=7/2k, and calculate the total first: k+m=k+7/2k=(2k+7k)/2=9/2k Now, we look for the ratio of m to the total: m/(k+m)=(7/2k)/(9/2k)=7/9 THe ratio of Melvin’s mass to the total mass is 7 to 9.
Final answer:

Melvin's mass expressed as a fraction of Kok Yang's mass is 7/2. The ratio of Kok Yang's mass to Melvin's mass is 2:7, and the ratio of Melvin's mass to the total mass of both combined is 7:9.

Explanation:

If Kok Yang's mass is 2/7 of Melvin's mass, we need to express Melvin's mass as a fraction of Kok Yang's mass. To do this, we set Kok Yang's mass to 1 (as a convenient reference) and Melvin's mass then becomes 7/2 times Kok Yang's mass, since 1 is 2/7 of 7/2. Therefore, Melvin's mass in terms of Kok Yang's mass is 7/2.

The ratio of Kok Yang's mass to Melvin's mass, given that Kok Yang's mass is 2/7 of Melvin's mass, is simply 2:7.

If a piece of ribbon is 5 and 1 over 2. feet long, how long is it in inches?

Answers

1 foot = 12 inches

5.5* 12 = 66 inches long

1 foot = 12 inches

so length of the ribbon is 5*12 + 6  = 66 inches

Can someone solve this fast , for 20 points

Answers

- 3 x y
-----------
8(y + 64)

How many times larger is the value of 260,00 than 260

Answers

260,00 is 200 times larger that 260.
it is 100 times larger because there are two more zeros and you can go 26,000/260 to get 100

Music store sells 22 blue MP3 players and 27 red MP3 players. Each MP3 player costs $41. What is a reasonable estimate for the total cost of the MP3 players? What is the exact answer for the total cost of the MP3 players?

Answers

Well 22 blue + 27 red = 49 total. And 49 MP3 players x $41 = exactly $2401
Final answer:

To estimate the total cost, round the numbers and calculate, we get an estimate of $2000. The exact answer for the total cost is $2009.

Explanation:

To estimate the total cost of the MP3 players, we can round the number of blue MP3 players down to 20 and the number of red MP3 players up to 30. So, estimating each at $40, we have a total of $40 x 20 + $40 x 30 = $800 + $1200 = $2000.

To find the exact answer for the total cost, we multiply the cost of each MP3 player ($41) by the number of blue and red MP3 players separately. So, the blue MP3 players cost $41 x 22 = $902, and the red MP3 players cost $41 x 27 = $1107. Adding these together gives a total of $902 + $1107 = $2009.

Learn more about Estimating and calculating total cost here:

https://brainly.com/question/29668369

#SPJ12

Monyne created a map of her neighborhood.She colored in the distance from her school to her house and wrote on the map that the distance was 0.7 of a mile. Write the distance between Monyne's house and her school as a fraction.

Answers

7/10 mile to convert .7 into a fraction put 70 over a hundred and you can simplify to 7 over 10

Amultivitamin tablet contains 16.5 mg calcium.How much calcuim does a bottle of 20 tablet contain?

Answers

16.5 mg of calcium per tablet × 20 tablets=

330 mg of calcium

Maggie's brother is 8 years younger than four times her age. The sum of their ages is 67.
How old is maggie?

Answers

I think she is 15 years old
Set up a system of equations
4m-8=b
m+b=67

Solve by substituting for what b equals
4m-8= 67-m
5m= 75
m=15

So she is 15 years old

A miner descended 1400 feet into a mine from the mine's entrance. While in the mine, he then rose 800 feet and then descended 450 feet. What was the miner's net gain or loss in altitude from the entrance of the mine?

Answers

descended would mean he was -1400 feet from the entrance

he then rose 800 feet so

-1400 + 800 = -600 feet

he then went down 450 feet

-600 - 450 = -1050 feet

net loss was 1050 feet

The temperature outside is 0 degrees F. If the temperature drops 14 degrees, what was the overnight low temperature?

Answers

It would be -14 degrees 
Final answer:

The overnight low temperature was -14 degrees F, calculated by subtracting the temperature drop from the initial temperature.

Explanation:

In the context of determining the overnight low temperature, it's essential to consider the initial temperature and the subsequent change. In this specific scenario, the starting point is a temperature of 0 degrees Fahrenheit. However, as the night progresses, the temperature experiences a decrease of 14 degrees.

To pinpoint the overnight low temperature, we employ a straightforward subtraction method. By subtracting the amount of change, which is 14 degrees, from the initial temperature of 0 degrees Fahrenheit, we arrive at the final result of -14 degrees Fahrenheit.

This calculation demonstrates the mathematical approach to determining temperature variations, which is especially pertinent in weather forecasting and climatology. It showcases how understanding temperature fluctuations and changes is crucial for assessing climatic conditions and their impact on various aspects of daily life and scientific research.

Learn more about Temperature Decrease here:

https://brainly.com/question/35440044

#SPJ2

Round 12,909 to the nearest hundreds

Answers

12,900 would be the answer.
12,909 rounded to the nearest hundreds would be 12,900.


Hope this helps you. :)

Fencing costs $10.15/ft. A customer purchases 8 3/8 ft of fencing for his yard. How much did the customer pay for the fencing? Round to the nearest cent.

Answers

the customer pays $85 because 10.15 multiplied by 8.375 equals 85.00625 or $85 hope that helps! 

a newspaper has 80 Pages if 20 of the 80 pages are devoted to advertising what percent of the newspaper is advertising

Answers

20/80=1/4
1/4=0.25
0.25*100=25

25% of the pages are devoted to ads.

Hope this helps!
Your fortune is "When frustrated, sing/scream the alphabet inside a public bathroom."

strawberries cost $2 per pound and gets 20% discount on the total cost. How much does Kate pay for the strawberries?

Answers

2 x 0.20 = 0.40

2.00 - 0.40 = $1.60.
We need to calculate the rate Kate pays, not the actual amount.

If the normal price is $2/lb and there is a 20% discount, then Kate pays

($2/lb)(0.80)  = $1.60/lb for the berries.

Kendra and her horse completed barrel racing course in 15.839 seconds what is the number rounded to the nearest tenth

Answers

the answer is 16.0 because you round the number 8 up

Answer:

The number rounded to the nearest tenth is 15.8.

Step-by-step explanation:

Kendra and her horse completed barrel racing course in 15.839 seconds.

So, the number rounded to the nearest tenth or 0.1 is 15.8 because the number next to 8 is 3, it will not make eight '9' .

Hence, the number rounded to the nearest tenth is 15.8.

We want to partition 100 mL into 10 equal parts. ow many milliliters should we pour in each cup?

Answers

If you want to partition 100 mL into 10 equal parts, you are essentially dividing 100 by 10. In other words, how many times does 10 fit into 100. The answer is 10 mL. Good luck!!

If we want to divide 100 mL into 10 equal parts we have to pour 10 mL into each cup.

What is an arithmetic operation?

It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has basic four operators that are +, -, ×, and ÷.

We'll apply division by Splitting into equal halves or groups, the division may be used to decide how to distribute a dish of cookies evenly among a group.

It is given that we want to divide 100 mL into 10 equal parts,

Suppose x milliliters should we pour into each cup,

x = Total volume / Number of cups

x = 100 mL / 10

x =10 mL

Thus, if we want to divide 100 mL into 10 equal parts we have to pour 10 mL into each cup.

Learn more about the arithmetic operation here:

brainly.com/question/20595275

#SPJ5

what is 6x+30=3x-42 whats the answer

Answers

subtract 3x from both sides
3x + 30 = -42

subtract 30 from both sides
3x = -72

divide both sides by 3
x = -24
Just subtract 30 from 6 = 24So x = -24. What I did is divide them both sides by 3.

A pair of running shoes cost $22.29. The store owner wanted to make a profit of $18.50. What should be the shoes’ selling price?

Answers

the running shoes should cost $40.79

Final answer:

The selling price for the running shoes should be $40.79 to include the cost price of $22.29 and the desired profit of $18.50.

Explanation:

To calculate the selling price of the running shoes to achieve a desired profit of $18.50, we simply add the cost of the shoes to the desired profit.

The cost of the shoes is $22.29, and the store owner wants to make a profit of $18.50.

Therefore, the selling price should be:

Cost of shoes: $22.29

Desired profit: +$18.50

Total selling price: $40.79

The store owner should set the selling price at $40.79 to make a profit of $18.50 on the pair of running shoes.

On a hike, each hiker carries the items shown. Write an expression in simplest form that represents the weight (in pounds) carried by x hikers. Interpret the expression.

Answers

A hiker has the following items:

A sleeping bag that weighs 3.4 lb

A Camping bag that weighs 4.6 lb

And a water bottle that weighs 2.2 lb.

The expression would be:

3.4x + 4.6x + 2.2x = x

Where x is the weight that each x hikers are carrying.

You just need to add the three items and the answer would be 10.2 pounds.

We want to find the total weight that each hiker carries by adding the weights of all individual items that they carry. And then we want an expression for the total weight that x hikers carry.

These items can be seen in the image at the end of the answer.

We will see that the total weight carried by x hikers is given by:

W(x) = (10.2lb)*x

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

First, let's find the weight that each hiker carries.

Each hiker carries:

Sleeping bag of 3.4 lb.Backpack of 4.6 lb.Water bottle of 2.2 lb.

The total weight is:

T = 3.4 lb + 4.6 lb + 2.2 lb = 10.2 lb

Then if each hiker carries 10.2 lb of weight, and there are x hikers, the total weight carried by them will be x times 10.2 lb

We have:

W(x) = (10.2lb)*x

If you want to learn more, you can read:

https://brainly.com/question/19770987

8 x 19 in distributive property
2(9+3) in distributive property
thanks
I need them in distributive property

Answers

Answer:

8(10) + 8(9)

2(9) + 2(3)

Step-by-step explanation:

Two feet is what percent of one yard

Answers

1 yard = 3 feet
2 feet = 2/3 of 1 yard

If you can't figure it out from there, and if you want to get really specific, it's 66.67%
Other Questions
A student rolls a standard number cube. What is the probability the student rolled a 4, given that the number rolled was greater than or equal to 2? HELP!!!!!!!!!!!!!!!!!!!!!!!! I WILL GIVE BRAINLIEST IF YOUR RIGHTWhich best analyzes the meaning of this metaphor?A. The cat, like the moon will witness the changes of the world and the passing of time.B. The cat like the moon is distant and cold. C. Like the moon the cat couldn't care less about the world around him.D. Like the moon the cat is beautiful and mysterious. Charles and nancy have decided to sell their family business and would like to transfer ownership to the next generation. which harvesting form would be best? Solve.1.5x3.1 give brainliestMyles is creating a Venn diagram about the music and sports programs at his school. Which should Myles write on his diagram where he lists qualities that are unique to sports? A requires students to rent or buy equipment B teaches students the value of discipline C encourages students to use their creativity D provides students a lot of physical activity In which quadrant is located if csc is negative and tan is positive? Considering what is known about memory, most telephone numbers are seven digits long because: Explicate the biblical allusion in reference to cain and abel and say what symbolic purpose it has here. Which of these lines from Walt Whitman's "I hear Americans singing" describes a unified America? I need help with proofs Complete each sentence with the correct verb. ella salsa en los tacos. yo mis libros a clase todos los das. el beb porque no puede caminar. yo en el mercado. charlie y sophie de mxico. You can recognize the process of pinocytosis when _____. you can recognize the process of pinocytosis when _____. the cell is engulfing extracellular fluid a receptor protein is involved the cell is engulfing a large partic What is the source of energy that causes surface currents in the ocean?A.density differences between freshwater and seawaterB.the magnetic attraction between the north and south polesC.the gravitational pull of the Moon and the Sun on the oceanD.winds created by the uneven heating of air on Earth by the Sun Did the Magna Carta influence the American colonists ideas about government? What were the positive and negative effects of the pendleton civil service act? A 0.5-kg ball accelerated at 50 m/s2 . What force was applied? Convert 4500 feet per second to miles per hour. 5280 ft = 1 mi Round to the nearest hundredth. What problem does the chromosome number of various organisms present to evolutionists? Describe the 5 types of species interactions Perhaps the most important political figure in American history, who was never elected president was this "Great Compromiser."A)Henry ClayB)Andrew JacksonC)James BuchananD)Andrew Johnson Steam Workshop Downloader