Answers
Related Questions
PLEASE HELP! A chemist is estimating the volume of a solution in a test tube. The actual volume of the solution is 33.4 ml. The chemist's estimate is 35 ml.
Find the absolute error and the percent error of the chemist's estimate. If necessary, round your answers to the nearest tenth.
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Absolute error is actual- estimate=33.4-35=-1.6 that in percent can be found using a rule of three, we say that 33.4 is the 100% and we find the % for -1.6
33.4ml -------- 100%
-1.8ml-----------x
x=(-1.8)(100)/33.4
x=-5.4
the percentage error is -5.4%
Haley worked 287 hours during the summer and earned $16 for each hour she worked.
Which is the closest estimate for the total amount she earned?
$4,500
$5,000
$5,500
$6,000
Answers
Answer: The closest estimate for the total amount she earned = $4,500
Step-by-step explanation:
Given: Total hours worked = 287 hours
Earning for each hour = $16
Total earning = (Total hours worked ) x (Earning for each hour)
= $ (287 x 16)
= $ 4592 ≈ $4500
The closest estimate for the total amount she earned = $4500
Which expression can be used to find the price of a 400$ telescope after a 32% markup?
A. 400 x 0.32
B. 400 x 3.2
C. 400 x 1.32
D 400 + 400 (0.32)
E. 400 x 400(1.32)
Answers
Usually = 400x32/10
Now do 32/100 = .32
Answer is A. 400x0.32
Answer:
A
Step-by-step explanation:
A because a markup means the price times the number given which was 32% and 32% is the same as 0.32.
find the slope of the line
Answers
Answer:
y= 3 + 3/4x sooooooo 3/4 is the slope... I think
Answer:
3/4
Step-by-step explanation:
You can use the x- and y--intercepts since they are easy-to-read points.
x-intercept: (-4, 0)
y-intercept: (0, 3)
To go from (-4, 0) to (0, 3), go up 3 and right 4. That is a rise of 3 and a run of 4.
slope = rise/run = 3/4
Answer: slope = 3/4
1 3/8 minus 1/2 thanks
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Answer:
0.833
Step-by-step explanation:
Which fraction is equivalent to the decimal 0.68 with the line on top?HELP FAST
A. 31/45
B. 682/999
C. 62/99
D. 2/3
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Answer:
A 31/45
Step-by-step explanation:
A 31/45=0.6888 (this is the awnser as the line on top means repeating)
B 682/999=0.682 (0.68 rounded)
C 62/99=0.62626 (repeating)
D 2/3=0.66666 (Or 0.67 rounded)
6 is _______________ % of 30. fill in the blank
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Answer:
6 is 20% of 30
Step-by-step explanation:
6 × 5 = 30
take one of the five parts and you get 20% of the full product
What type of number is -296.2i
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it is a negetive integer
HOPE THIS HELPS
PLEASE MARK ME AS BRAINLIEST.
Write the ratio of 3/5 miles to 1/2 miles as a fraction in simplest form
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Answer:
Three over Ten
Pls help with math ASAP pls
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i do not think the order matters, so the answer should be the first two.
8. Simon is saving his money to buy an Xbox. He earn money by mowing lowns for his
neighbors. The situation can be represented using the equation 35x - 2y = -42 where x
represents the number of lawns mowed and y represents the amount of money Simon has in his
bank account.
( explainations are muc appreciated:) )
a. How much money does Simon earn for mowing each lawn?
b. How much money was in Simon's bank account before mowing any lawns?
Answers
Answer:
a. $35
b.$21
Step-by-step explanation:
a. It is what your are multiplying the number of lawns mowed by
b. -2y = -42
divide by -2 on each side
y=21
(you don't need the 35x because we are trying to find how much before he started mowing)
Somebody please help me :(
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Find the length of side x in simplest radical form with a rational denominator
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Answer:
rggsktvvg gggggggggggg yyyhhhhg
Question 7
1 pts
8. Tianna worked 45 hours last week. Her employer pays time and a half for hours over 40. Her gross pay was $451.25. What is her
hourly rate?
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Answer:
$9.50
Step-by-step explanation:
40x + (5*1.5*x) = 451.25
40x + 7.5x = 451.25
47.5x = 451.25
x = 9.50
Write an equation to represent the number of pages Jesse has read. Using x, the number of days Amir has been reading, write an expression to represent the number of days Jesse has been reading. Remember that Jesse started reading one day before Amir. Use this expression to write an equation for the number of pages Jesse has read. Let y represent the number of pages read.
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Question:
Jesse and Amir were assigned the same book to read. Jesse started reading on Saturday, and he is reading 30 pages a day. Amir didn't start until Sunday, but he is reading 35 pages a day.
How many days will it take Amir to catch up to Jesse, and how many pages will they each have read?
Write an equation to represent the number of pages Amir has read. Use x to represent the number of days Amir has been reading and y to represent the number of pages he has read.
Answer:
It will take 6 days
Step-by-step explanation:
For Jesse:
[tex]Rate = 30\ pages/day[/tex]
This implies that Jesse will cover 30y in y days
For Amir:
[tex]Rate = 35\ pages/day[/tex]
This implies that Amir will cover 35x in x days
Because Amir starts a day later,
[tex]y = x + 1[/tex]
So, we have the following equations:
[tex]Jesse = 30y[/tex]
[tex]Amir= 35x[/tex]
[tex]y = x + 1[/tex]
To get the number of days when they read the same number of pages, we have:
[tex]Jesse = Amir[/tex]
Substitute values for Jesse and Amir
[tex]30y = 35x[/tex]
Substitute x + 1 for y
[tex]30(x+1) = 35x[/tex]
Open bracket
[tex]30x+30 = 35x[/tex]
Collect Like Terms
[tex]30 = 35x-30x[/tex]
[tex]30 = 5x[/tex]
Solve for x
[tex]\frac{30}{5} = \frac{5x}{5}[/tex]
[tex]\frac{30}{5} = x[/tex]
[tex]6 = x[/tex]
[tex]x = 6[/tex]
an one hour mathematcis class ks divided up into the schedule shown jn the table below how many mintyee of class are allowed for independent pratice?
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Answer:
i got 15
Step-by-step explanation:
Answer:????? Math (O-O)
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Answer: the first one is 30. The second is .294. The third is 2/3.
Step-by-step explanation:
2. 2 more than the four times a number r
Translate this to an expression
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How do percents show the relationship between quantities?
Answers
9514 1404 393
Explanation:
A percentage is a representation of a fraction. Just as any fraction relates a quantity to a whole, so does a percentage.
Example:
3/5 represents 3 parts out of 5.
Its equivalent as a percentage is ...
3/5 · 100% = 60%
which also represents 3 parts out of 5, or 6 parts out of 10, or 60 parts out of 100.
__
Note that the percent symbol (%) can be considered to be a shorthand way to write /100. Similarly, the "mils" symbol (‰) can be considered a shorthand way to write /1000. That is, 60% is fully equivalent to 60/100, and vice versa.
Engineers are playing a new bridge to cross a small river. Surveyors created the diagram to show where the bridge across the river.
What is the distance across the river where the new bridge will be built?
A. 36 feet
B. 56.25 feet
C. 100 feet
D. 101.25 feet
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Answer:
I believe it was B.
Step-by-step explanation:
which is the correct answer?
(Note): (If you give a silly or absurd answer I will report you)
Answers
Answer:
lolooollollolololo-
jk
The answer is
J) 334.06
Step-by-step explanation:
We know the rate is 1.5 inch an hour
So 1.5*2.54 is 3.81
Now 3.81 cm every hour
24 hours a day
3.81*24=91.44
Now 91.44 cm A day
1 Year or 365 days
91.44*365= 33375.6cm a year
now we also need to add the extra 12 inches in the beginning
12*2.54=30.48cm
Now add those 2
33375.6+30.48= 33406.08
now the answer asked for meters so we divide 33406.09/100
you’ll get 334.06 or J
J) 334.06
This is your answer
Given the function y=2x and the domain (-1, 0, 1, 2), the corresponding range is (-2,
0.2, 6).
True
False
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2x2≠6
Do all of them for cookie idek
Answers
Step-by-step explanation:
slope.
1.2x
2.-x
3.1/4x
4.6x
5.3/4x
y intercept:
1.4
2.-2
3.1
4.12
5.1/2
The kittens, Annie and Josie, are pushing a ball, Annie with a force magnitude of 80 N in a direction of 133 degrees, and Josie with a magnitude of 95 N in a direction of 290 degrees. If a third cat wants to prevent the ball from moving, with what magnitude and direction of force must she push?
Answers
Answer: Then the magnitude of the force is 37.86N, and the direction is 54.35°
Step-by-step explanation:
We can write the forces as vectors.
We know that Annie pushes with a magnitude of 80N in a direction of 133° (Remember that the angles are always measured from the x-axis)
The components of this force, (Ax, Ay), are then:
Ax = 80N*cos(133°)
Ay = 80N*sin(133°)
And we know that Josie pushes with a magnitude of 95N in direction of 290°
The components of this force, (Jx, Jy), are:
Jx = 95N*cos(290°)
Jy = 95N*sin(290°)
When we add these forces, the total force acting on the ball is:
F = (80N*cos(133°) , 80N*sin(133°)) + (95N*cos(290°), 95N*sin(290°))
F = (80N*cos(133°) + 95N*cos(290°), 80N*sin(133°) + 95N*sin(290°))
Now, the third kitten wants to do a force K, in a direction θ, such that the net force acting on the ball is zero.
Then we must have that, each component of the force of the third cat (K*cos(θ) on the x-axis and k*sin(θ) on the y-axis), is such that:
K*cos(θ) + 80N*cos(133°) + 95N*cos(290°) = 0
k*sin(θ) + 80N*sin(133°) + 95N*sin(290°) = 0
Now we need to solve that system for k and θ
if we simplify the equations we get:
k*cos(θ) - 22.07N = 0
k*sin(θ) -30.76N = 0
Now we can rewrite them as:
k*cos(θ) = 22.07N
k*sin(θ) = 30.76N
Now we can take the quotiet between both equations to get:
(k*sin(θ))/(k*cos(θ)) = 30.76N/22.07N
Tan(θ) = 1.394
θ = Atan(1.394) = 54.35°
Now that we know the angle, we can find the value of the magnitude k, by using one of the two equations of the system:
k*cos(54.35°) = 22.07N
k = 22.07N/cos(54.35°) = 37.86N
Then the magnitude of this force is 37.86N, and the direction is 54.35°
The price of shares of Nadir Explorations Ltd. fell by 76% in the past year, to the current price of $0.45 per share. In dollars and cents, how much did the price of each share drop in the past year?
Answers
Answer:
$0.342 ; 34.2 cents
Step-by-step explanation:
Given that:
Share price fell by 76% in past year :
current price per share = $0.45
Drop in price of share in past year :
76% of current price
0.76 * $0.45
= $0.342
Price dropped by $0.342 per share
In cent, 0.342 * 100 = 34.2 cents
any help
please
thanks
Answers
Answer:
n=54
Step-by-step explanation:
Since this is a proportion problem, you have cross mulitply.
7n=9x42
7n=378
n=54
Answer:
cross multiply
9×42=378
7×n=7n
n=378/7
n=54
simplifly the expression 2(x - 5)
Answers
Answer:
2x - 10
Step-by-step explanation:
2(x - 5)
distribute
2*x - 2*5
2x - 2*5
2x - 10
Pls pls help it is due todayyy:)))
Answers
Answer:
a dilation is different from a translation because it enlarges an image or shrink them instead of moving them. it's also different from rotation since it doesn't rotate but enlarge or shrink. it's way far from reflection because it enlarges or shrinks.
Answer: A diliation is a non rigid transformation, whereas reflections, transitions and rotations are rigid transformations. This means that dilations do not preserve the size of the shape.
write a story to represent the equation 1/2÷3 solve the equation and complete the story
Answers
Answer: ↓↓
Step-by-step explanation:
Fred, Ben, and George bought a pizza. George's sister and her friends ate some of the pizza, they left 1/2 of the whole pizza. Fred decided that they should share the remaining pizza equally. How much of the pizza will they each get?
1/2 ÷ 3 = 1/6
The three boys will each get 1/6 of the pizza.
Hope this is good! :3
Is -4 a integer and a whole number pleaseeeeeeee
Answers
Answer:
-4 is an integer however NOT a whole number.
Step-by-step explanation:
Integer include numbers that can be written as a fraction(whole number) and their negative selfs. So: 1,2,3,4... and -1,-2,-3,-4...
Whole numbers are numbers that can be written as a fraction but do not include negative, so any number like: 1,2,3,4... but it can't be negative.
Ace