Sally and Marta had the same number of postcards. After Sally sold
18 of her postcards, Marta had 4 times as many postcards as Sally.
How many postcards did each girl have to begin with?
Answer:
the equation x - 18 = 4(x - 18)
Step-by-step explanation:
x - 18 = 4x - 72
x - 4x = - 72 + 18
- 3x = - 54
x = 54/3
x = 18
Sally had 36 postcards to begin with (18 + 18)
martha had 0 postcards to begin with
i feel like i did something wrong someone double check this but i think this is the answer.
Answer:
x-18 = 4(x-18)
Step-by-step explanation:
x-18 =4x-72
3x =54
x=54/3
x=27
I will give brainliest to first awnser
What is the slope of the line representing the conversion of degrees to gradients?
Express your answer as a decimal rounded to the nearest hundredth.
Answer:
1.11
Step-by-step explanation:
The Slope is defined as the rate of change.
In this case,
Slope = -200+100/-180+90
= -100/-90
= 10/9
= 1.11
12 years ago, Catherine deposited $200 in a savings account that pays 7.25% simple interest. What is the balance in Catherine’s account?
Answer:
$374
Step-by-step explanation:
I=PRT
I=Interest
P= starting amount
R= Rate
T= Time
12*200=2400*(0.0725)=174+200=
$374
heelelp meeeee pleaseeeeeeeeeeee
Answer:
answer is 446
Step-by-step explanation:
Which equation is a proportional relationship?
A. y=2x
B. y=-3x
C. Both
D. Neither
Answer:
c
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
Multiply: 14.3 x -0.5
Answer:
The answer is -7.15, hope this helps.
Can you please help with this please!!!!!!i need this please answer 5-8 please actually answer please
Answer:
69, 36, 39, 87.5
Step-by-step explanation:
Answer no. 5
60/100×15=9
60+9=69
Answer no. 6
32/100×12.5=4
32+4=36
Answer no. 7
50/100×22=11
50-11=39
Answer no. 8
125/100×30=37.5
125-37.5=87.5
Answer:
The answer is 69, 36, 39, 87.5.
Without computing, decide whether the value of each expression is much smaller than 1, close to 1, or much larger than 1.
1,000,001÷99
3.7÷4.2
1÷835
100÷1100
0.006÷6,000
50÷5014
Answer:
1- more than 1
2-less then 1
3-less then 1
4- less then 1
5-less then 1
Step-by-step explanation:
Select EACH situation that can represent a proportional relationship.
The total amount of toys a child earns when he earns 2 toys a week for w weeks.
The total amount a taxi driver earns who charges a base of $3 plus an additional $1 per mile for m miles.
The price of buying x avocados at $4 a pound.
The total amount a Gardner earns who charges a one time fee of $10 plus $15 an hour for gardening r hours.
PLZZZZZ HELP MEEE
Answer:
c
Step-by-step explanation:
because a proportional relationship can be thought of as one is always the same then gets times by the other or in this case 4 by x
Options A and C have a proportional relationship.
Given that, the total amount of toys a child earns when he earns 2 toys a week for w weeks.
What is a proportional relationship?Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is known as the "constant of proportionality".
A) Let the total number of toys be x
So, x=2w
B) Let the total amount a taxi driver earns be y
So, y=3+m
C) Total cost of buying x avocados be p
So, p=4x
D) Let the total amount a Gardner earns be c
So, c=10+15r
Therefore, options A and C have a proportional relationship.
To learn more about the proportional relationship visit:
brainly.com/question/12917806.
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Title of Novel: War Horse Author:______________________________________________________ When and where was the author born?________________________________ In what year was the novel written? _________________________________ Time Frame Research Answer How did this influence the writing of the story? Give three important details about this author’s life. What was the political climate of the time in which the novel was written? Were there any major wars or conflicts, either local or worldwide, during this time? What was the economic situation during the time in which the novel was written? Was there a depression or any type of major financial suffering during this time? Cite at least two resources that you used to get your information from, using MLA format. (MLA format instructions can be found in the Writer’s Workshop) In a short paragraph, explain what important theme or message your novel reveals about the past. Then, tell how this same message relates to today’s world.
Answer:
Michael Morpurgo and he was born at st.albans united kingdom
Step-by-step explanation:
PLEASE HELPPPPP!!!!!!!!!!!!
Answer:D
Step-by-step explanation:
I just did the quiz and passed !
plz help 100 points!!!!!!!!!!!!!!!!
Answer:
I'm pretty sure is number two
Step-by-step explanation:
because I solved the problems
Answer:
The answer is A
Step-by-step explanation:
Express the number in scientific notation as real numbers:
[tex]9.4 \times {10}^{ - 8} = 0.000000094 \\ 9.25 \times {10}^{ - 6} = 0.00000925 \\ 2.5 \times {10}^{3} = 2500 \\ 7 \times {10}^{3} = 7000[/tex]
So, from least to greatest;
[tex]0.000000094 - 0.00000925 - 2500 - 7000[/tex]
9.4 x 10^-8, 9.25 x 10^-6, 2.5 x 10^3, 7 x 10^3 (first option)
What is the equation for the line in slope-intercept form?
Enter your answer in the box.
Answer:
y = 1/2x - 4
Step-by-step explanation:
find slope using rise/run and find y-intercept then plug into the equation.
What number on the number line is exactly the same distance from -8 and +4?
PLEASE HELP ME, I WILL GIVE BRAINLIEST (I WILL GIVE 50 POINTS)
Answer:
B, D, EStep-by-step explanation:
[tex]B.\\\left(8\dfrac{4}{5}+3\dfrac{2}{10}\right)+\left(-1\dfrac{1}{5}\right)=8\dfrac{4}{5}+\left(3\dfrac{2}{10}+\left(-1\dfrac{1}{5}\right)\right)=8\dfrac{4}{5}+\left(3\dfrac{2}{10}-1\dfrac{1}{5}\right)[/tex]
[tex]D.\\8\dfrac{4}{5}+3\dfrac{2}{10}-1\dfrac{1}{5}=8\dfrac{4}{5}+\left(3\dfrac{2}{10}-1\dfrac{1}{5}\right)[/tex]
[tex]E.\\-\left(-8\dfrac{4}{5}\right)-\left(-3\dfrac{2}{10}\right)+\left(-1\dfrac{1}{5}\right)=8\dfrac{4}{5}+3\dfrac{2}{10}-1\dfrac{1}{5}=8\dfrac{4}{5}+\left(3\dfrac{2}{10}-1\dfrac{1}{5}\right)[/tex]
Used:
Associative property
[tex](a+b)+c=a+(b+c)=a+b+c[/tex]
and
[tex](-)(-)\to(+)\\(-)(+)\to(-)\\(+)(-)\to(-)[/tex]
Answer: D
Step-by-step explanation: The answer is D. It's pretty straight forward. Compare the two answers and you will see that D is equivalent to that equation.Please answer fast and write equations for each question!!!
Jimmy’s deck is going to be 100 m2. He has calculated that it will cost him $50/m2 for all the materials needed to build his deck. Jimmy has $5500 on his credit card for this project. Does he have enough money to complete this project?
3. The Housing Depot offers Jimmy a great deal: no interest on his project if he pays it off in a year. How much will Jimmy have to pay each month so that he is debt-free in a year?
Answer:
D. 411.25
Step-by-step explanation:
i did edg.
Spiral review
6y + 5
Name the coefficient, variable and constant of the expression.
Evaluate if y = 1/2
Answer: The evaluated answer is 8. The coefficient is 6. The variable is y. The constant is 5.
Step-by-step explanation for the evaluated answer: Just substitute 1/2 for y. You should get 6x1/2+5. Then, multiply the 6 and the 1/2 and you should get 6/2+5. 6/2 can be simplified to 3 and then you just need to add the five to get 3+5=8. S your final answer should be 8. Hope this helps!
What percent is represented by the shaded portion of this 10 × 10 grid?
A grid model has 100 squares. 40 squares are shaded
1. 4/100
2. 40/100
3. 4%
4. 40%
Answer:
answer #4
Step-by-step explanation:
because you have 100 tiles. if you fill in 1 tile, that 1 percent. if you fill in 4 tiles, that 4 percent. you fill in 40? 40 percent. and option 2 is not a percentage so it cannot be correct
Which values from the given replacement set make up the solution set of the inequality? m+7<18 ; {8, 9, 10, 11}
Answer: 8, 9, and 10
Step-by-step explanation: whatever value m is must be less than 18
What do you get when you subtract the actual number from the estimated number?
Answer:
you would most likely get a decimal but I'm not for sure
Step-by-step explanation:
please help ~~ and if you could, please explain what a constant of proportionality is :)
Answer:
The answer is D. k=5
Step-by-step explanation:
The constant of proportionality is just the rate the x increases or decreases at. The x is increasing by 5 over time so the COP or rate is 5.
Answer:
The answer is D: K=5
Step-by-step explanation:
The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate. The constant of proportionality k is given by k=y/x where y and x are two quantities that are directly proportional to each other.
So, what you do is that you get the first number, which is 5/25. Simplify it and divided to get it as low as possible, if you do that, you would get 1/5 and 1/5 can also mean 5/1 in these situations. So your basic answer is 5.
Ronelle asked 100 students to choose their favorite subject from among mathematics, history, and art. She found that 22 students chose mathematics, 26 history, and the rest art. What percent of students chose art?
22%
26%
48%
52%
Answer:
❌22%
❌26%
❌48%
✔️52%
Please help me ASAP and I will give brainiest.
Answer:
4+-2
Step-by-step explanation:
Answer:
y=2x+4
Step-by-step explanation:
What is the slope of the line shown?
Please note that anyone who answers this post with random letters and or numbers that have nothing to do with this mathematics problem will be deleted or reported.
Hello!
[tex]\large\boxed{Slope = -\frac{1}{2}}[/tex]
Use the slope formula along with provided points to solve for the slope.
We can use the points (-4, -1) and (0, -3) and plug these values into the equation:
[tex]m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]
[tex]m = \frac{-3-(-1)}{0-(-4)} \\\\m = \frac{-2}{4} \\\\m = -\frac{1}{2}[/tex]
I NEED HELP ASAP <3
Mateo’s aunt bought a share of stock many years ago.
The value of the stock increased by 80%.
Its value is now $270.
What was the value of the stock when Mateo’s aunt bought it?
The value of the stock when Mateo’s aunt bought it was $150.
What is the fundamental principle of multiplication?Multiplication is the mathematical operation that is used to determine the product of two or more numbers. If an event can occur in m different ways and if following it, a second event can occur in n different ways, then the two events in succession can occur in m × n different ways.
We need to find the value of the stock when Mateo’s aunt bought it.
Given that the value of the stock increased by 80%. Its value is now $270.
The stock has increased 80% thus it is now worth 180%.
Then Divide by 180;
$270/180 = $1.50
Now find 100% then Multiply by 100;
$1.50 X 100 = $150
The value of the stock when Mateo’s aunt bought it was $150.
Learn more about multiplications;
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help me solve the problems, please! I will give the brainiest!
Answer:
1/5
1/3
Step-by-step explanation:
For the first problem:
5/7 of ... is 1/7
so
5/7 of x is equal to 1/7
so
(5/7)x = (1/7)
so
x = (1/7)/(5/7)
so
x = 1/5
For the second problem:
5/7 of ... is 5/21
so
5/7 of x is equal to 5/21
so
(5/7)x = (5/21)
so
x = (5/21)/(5/7)
so
x = 1/3
I Will Mark Brainliest!!
The table below shows the combination of dry pre-packaged mix and water to make concrete. The mix says for every 1 gallon of water is equal to 8lbs. Using the information provided in the table, complete the remaining parts of the table.
Fill in the table with the lowest terms fractions.
To enter a mixed number, write it in the format 5 1/2. Note that there is a space between the whole number and fraction.
Answer:
Dry Mix | Water | Total
64 | 8 | ?
75 | 10 | ?
| | ?
4 1/2 | 14/25 | ?
Step-by-step explanation:
im not done
Answer:
i dont know
Step-by-step explanation:
Which equation describes this graph?
A. y=−3x−3
B. y=x−3
C. y=x
D. y=x+3
Please help- I am super confused with these kinds of graphs.
Answer:
B
Step-by-step explanation:
Solve: 3(x- 2)= 18.
X=
Answer:
x = 8
Step-by-step explanation:
3(x-2)=18
3x-6=18
3x=24
x=24/3
x=8
Answer:
x = 8
Step-by-step explanation:
3 (x - 2) = 18
3x - 6 = 18
18 + 6 = 24
3x = 24
x =
Helppp meeee plzzzzzzzz