Answer:
His mistake was that he removed the fraction and instead he used [tex]7^4^-^3 =7^1\\[/tex]. He should've kept the fraction to make the answer right.
evaluate this expression when c= -2 and d= 2:
Step-by-step explanation:
you just have to put the given values in place of the variable names and then simply calculate.
(-2² + 2²) - 2(-2² - 2²) = (4 + 4) - 2(4 - 4) = 8 - 2×0 = 8
so, B is the right answer.
please remember the correct sequence of operations :
first are brackets.
then exponents.
then multiplications and divisions.
and then (at last) additions and subtractions.
and also please remember : multiplying a negative number with a negative number creates a positive result.
that is of course also true for squaring a negative number, as ² just means that the negative number is multiplied with itself.
now you also know the result of -2³, right ?
as this means -2 is multiplied 3 times by itself. what does that do to the sign ?
-2 × -2 = 4 (positive).
but now we have to multiply a third time
4 × -2 = -8 (because multiplying a positive number with a negative number creates a negative result).
Why is taking a census better than taking samples in a survey?
if you have a bacteria cell that you touch at 9:00 am (so now you have one cell on you) and it multiplies every 20 mins how much will i have on me at 4:00
Well, 9:00 AM to 4:00 PM would be 7 hours. 7 hours into minutes would be 420. 420 divided by 20 is 21. This means it multiplies 21 times from 9:00 to 4:00. Since it multiplies by 2, than you need to skip count with the pattern multiply by 2 and stop once you have 21 numbers.
1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576. That would be 21 numbers.
The answer would be 1048576.
I think this is correct. :/
a stack of 500 pieces of paper is 1.875 inches tall derion guesses that each piece of paper is 0.015 inches thick. explain how you know that derions answer is not correct.
compute the thickness of each piece of paper. show your reasoning
Answer:
Derions answer is not correct becuase 500 x 0.015=7.5 inches. If he got this as an answer that would meen that the stack of paper is 7.5 inches tall, which is not correct.
If we divide 1.875 by 500 we get 0.00375 which is the thickness of each sheet of paper.
What is 4 3/10 plus (-6.2) in decimal form
Answer:
Step-by-step explanation:
First change 4 3/10 to 4.3. Then you change 4.3 + -6.2 to 4.3 - 6.2.
Then you do 4.3 - 6.2 and you should get - 1.9.
Answer:
The answer is (-1.9)
Step-by-step explanation:
4 3/10 = 4 × 10 + 3/10 = 43/10 = 4.3
Now,
4.3 - 6.2 = -1.9
Thus, The answer is (-1.9)
-TheUnknownScientist 72
Which number line shows the solution set for StartAbsoluteValue d EndAbsoluteValue greater-than 3?
A number line going from negative 4 to positive 4. Closed circles are at negative 3 and positive 3. Everything to the left of negative 3 and right of positive 3 is shaded.
A number line going from negative 4 to positive 4. Open circles are at negative 3 and positive 3. Everything between the points is shaded.
A number line going from negative 4 to positive 4. Closed circles are at negative 3 and positive 3. Everything between the points is shaded.
A number line going from negative 4 to positive 4. Open circles are at negative 3 and positive 3. Everything to the left of negative 3 and to the right of positive 3 is shaded.
Answer:hich number line shows the solution set for StartAbsoluteValue StartFraction s Over 2 EndFraction + 4 EndAbsoluteValue less-than 2.? A number line going from negative 14 to positive 10. Open circles are at negative 12 and negative 4. Everything between the points is shaded. A number line going from negative 14 to positive 10. Open circles are at negative 12 and negative 4. Everything to the left of negative 12 and to the right of negative 4 is shaded. A number line going from negative 14 to positive 10. Closed circles are at negative 4 and positive 4. Everything to the left of negative 4 and to the right of positive 4 is shaded. A number line going from negative 14 to positive 10. Closed circles are at negative 4 and positive 4. Everything between the points is shaded.
Step-by-step explanation:
Susan opened a college savings account 4 years ago. She opened the account with an initial deposit of $3,000. Starting the next year, she deposited $1,000 on the same day each year. The account earns interest at an annual rate of 4.15% and is compounded annually. Susan hopes to have earned enough interest to pay for her first year of college tuition, which costs $7,100. What is the difference between her ending balance after 4 years and the cost of her tuition?
Answer:
$20
Step-by-step explanation:
multiply 100.00 x 5% which is 100x 0.05, then it will give you 5.
add 5, 4 more times which will give you 20
Determine the number of solutions in this equation:
5x + 3 - 3x = 2 ( x + 3 ) - 5
Answer:
No solutions
Step-by-step explanation:
2x+3=2x+6-5
2x+3=2x+1
The two x's cancel out, so you get
3=1
Subtract 3 from each side to get
0=-2
So the answer is no solutions
Done the first two but i dont know how to do the mean of it
To find mean:
1) Add up all data values to get the sum
2) Count the number of values in your data set
3) Divide the sum by the count
First we have to find all the data values. We do this by finding all of the peas, not just the information numbers of peas in a pod.
4 x 2 = 8
5 x 10 = 50
6 x 18 = 108
7 x 14 = 98
8 x 6 = 48
8 + 50 + 108 + 98 + 48 = 312 total number of peas
2 + 10 + 18 + 14 + 6 = 50
312 / 50 = 6.24 peas per pod
So in our example the mean number of peas in a pod is 6.24.
I hope this helps! :)
I really need help!!
Sam has 6x + 8 dollars saved. Teresa has saved 14x + 32 dollars. Together they have $220 saved. How much money have they each saved individually?
Step-by-step explanation:
given,
dollars saved by Sam = 6x + 8
dollars saved by Teresa = 14x + 32
total money = $220
a/q
money saved by,
sam + Teresa = $220
so,
6x + 8 + 14x + 32 = 220
20x + 40 = 220
20x = 220 - 40 = 180
x = 180/20 = 9
x = 9
now,
money saved by,
Sam = 6x + 8 = 6(9) + 8 = $62
Teresa = 14x + 32 = 14(9) + 32 = $158
therefore,
money individually saved by Sam is $62 and by Teresa $158.
HOPE THIS ANSWER HELPS YOU DEAR! TAKE CARE
please help me thanksssssss
Answer:
your welcomeeeeeeeeeeee
Step-by-step explanation:
:)
The sum on both sides need to be equal to be balanced. Because the right side is being multiplied then also multiply the left side.
Answer: 3rd choice: f1 x d1
Is it 1,2,6,10,14 Please explain
Answer:
Melinda adds $12 to her savings account each week and Marcus adds $14 each week
Melinda adds $2 less than Marcus
Step-by-step explanation:
Melinda:
135 - 75 = 60
60 ÷ 5 = 12
She saves $12 each week
Marcus:
y=14x+25
y=14x5+25
y= 70+25
y=95
95-25=70
70÷5= 14
Marcus saves $14 each week
How can I improve my skills in math?
Answer:
You can practice a lot and reliable resources to help get answers.
Step-by-step explanation:
a couple of sites to practice on is IXL, khan academy, and aleks. hope this helps. :)
4 pounds of grapes cost $5. 7 pounds of grapes cost $8.75. What is the cost per pound?
Answer:
$1.25 per pound
Step-by-step explanation:
$5 ÷ 4 = $1.25
$8.75 ÷ 7 = $1.25
Express this number in scientific notation.
0.00014
Answer:
1.4 x 10^-4
I cant do powers on my laptop so thats what the arrow represents, I don't know if you know that or not so.
the -4 is because you move the decimal to the right 4 times to make the decimal between the two numbers making it 1.4
It takes Zack 15 minutes to walk 7 1/2 blocks to the swimming pool. At this rate, how many blocks can he walk in one minute?
A. 1/5 Block
B. 1/2 Block
C. 2 Blocks
D. 5 Blocks
Answer:
I think its 1/2 hope this helps
Step-by-step explanation:
Answer:
1/2 Block (B)
Step-by-step explanation:
7 1/2 divided by 15 is 1/2.
Is the sequence arithmetic, geometric or neither? Then, find the next three terms. 0, 3, 6, 9, 12, ___, ___, ____
Answer:
arithmetic (+3)
15, 18, 21
Step-by-step explanation:
Answer:
15,18,21
Step-by-step explanation:
Which graphs show continuous data?
Select each correct answer.
Answer:
I say the first graph in the first pic
Also,the 2nd graph in the 2nd pic
Answer:
the first one
Step-by-step explanation:
A boat went downstream and traveled a distance in 3 hours. the return took 3 hours and 40 min. find the speed of the water current of the speed of the boat in still water is 18
Answer:
Step-by-step explanation
:
i need help please....
Answer:x=-7
Step-by-step explanation:
Usually, when Landon makes bird food, he mixes 9 cups of seed with 6 tablespoons of maple syrup. However, today, he is short on ingredients. Describe a recipe that would make a SMALLER batch of bird food but still taste exactly the same.
Answer:
3 cups of seeds and 2 tablespoons of maple syrup
-OR-
6 cups of seeds and 4 tablespoons of maple syrup
Step-by-step explanation:
As this is a ratio of 9:6: "for every 9 cups of seeds, there is 6 tablespoons of maple syrup"
The original ratio is 3:2 "for every 3 cups of seeds, there is 2 tablespoons of maple syrup"
Using this ratio, we can infer that 3:2 or 6:4 would be a simpler answer for this problem. If there is doubt, it would be better to use 3:2 as it is the smallest ratio.
Can someone answer this for me?
Answer:
24.75
Step-by-step explanation:
divide 33.00 by 4 and multiply the sum by 3
Answer:
57.75
Step-by-step explanation:
The sum of the interior angles of any triangle is equal to:
A. 90°
B.120°
C. 180°
D.240°
E. 360°
PLEASE give me the answer im really stuck and tried so many times this is for a grade!! Thanks :)
The answer is c. 180
4) The local market is selling % pound of apples for $0.15. How
much is a pound of apples? How many pounds of apple can you
purchase for $1.00?
5) Mary's car can travel 8 miles on 1/5 a gallon of gas. How many
miles can Mary travel on a gallon of gas? How much gas does
Mary's car use for one mile?
6) Tanner finishes 2/5 of his homework every night in 3/5 of an
hour. In how many hours does Tanner finish all of his
homework? How many of his homework does Tanner finish in
one hour?
7) Mandy needs 3/8 a yard of fabric to complete % of a quilt. How
many yard of fabric does she need to complete one quilt?
How do i find a mean in a data set?
Answer:
Add them all up then divided by how many numbers there are
Step-by-step explanation: :)
Answer:
How do you find the mean?
The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are.
Step-by-step explanation:
The trip from Carville to Planesborough takes 4 1/2 hours when traveling at a constant speed of 70 miles per hour. How long, in hours, does the trip take when traveling at a constant speed of 60 miles per hour?
Answer:
5h 15 min
Step-by-step explanation:
70 mph * 4,5 = 315 miles
315 / 60 = 5,25h
5,25h = 5 1/4h = 5h 15 min
Answer:
6.8
Step-by-step explanation:
i hope tis helps
Find the measures of the interior angles
Please and thank you
PLS ANSWER ASAP MEANING RIGHT NOW ;-; i'm losing brain cells
Suppose Enrique has two building blocks. The area of one face of one of the blocks is 4 square centimeters and the area of the face of the other block is 100 square centimeters. What is the scale factor from the smaller block to the larger block?
Answer:
I think the larger block has a scale 25 times bigger than the smaller block since 100 divided by 4 equals 25
Please tell me if I'm wrong
I hope this helps
:D
Answer:
The Scale factor is 5.
Step-by-step explanation:
Because the area has cm^2 to find the scale factor you find the number it takes to get from one area to the next and take the square root.
4X = 100
X = 100/4
X = 25 (Take the sqrt because of area)
X = sqrt(25)
X = 5
The Scale factor is 5.
PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP AND NI FILES
I hate files that give you viruses, anyways I'm going to do this question.
Though, can you give me more information please?
Answer:
Melinda saves 2 less dollars than Marcus each week.
Step-by-step explanation:
Y = 12x + 75 is Melinda's equation. Y = 14x + 25 is Marcus's equation. First we'll disregard how much money they have saved already to see how much they save weekly. So Melinda's new equation is Y = 12x, and Marcus's new equation is Y = 14x. Now we'll do Marcus's equation (14x) - Melinda's equation (12x) to see how much more money Marcus saves each week, which will in turn will tell us how much less money Melinda saves each week.
14 x - 12x = 2. (x-x=0) This tells us Marcus saves 2 more dollars than Melinda each week.
Which gives us our answer, Melinda saves 2 less dollars than Marcus each week.
What is the value of the expression when c=0 and d=-6 ?
cd-d2/4
Answer:
-9
Step-by-step explanation:
This what you wrote:
[tex] cd - \dfrac{d^2}{4} = [/tex]
[tex] = (0)(-6) - \dfrac{(-6)^2}{4} [/tex]
[tex] = 0 - \dfrac{36}{4} [/tex]
[tex] = -\dfrac{36}{4} [/tex]
[tex] = -9 [/tex]
Maybe this is what you meant to write:
[tex] \dfrac{cd - d^2}{4} = [/tex]
[tex] = \dfrac{(0)(-6) - (-6)^2}{4} [/tex]
[tex] = \dfrac{-36}{4} [/tex]
[tex] = -9 [/tex]