Answer:
92%
The average of 82%, 72%, 74%, and 92% is 80%
She need 92% on her fourth test in order to have an average of 80% on the first four tests.
Here,
Carmen had scores of 82%, 72% and 74% on her first three tests of the term.
We have to find the score of fourth test.
What is Average?
The average (mean) is equal to the sum of all the data values divided by the number of values in the data set.
Now,
Carmen had scores of 82%, 72% and 74% on her first three tests of the term.
To find the score of fourth test in order to have an average of 80% on the first four tests we use the formula of average,
Let the score of fourth test is x.
Then, Average = [tex]\frac{82+72+74+x}{4}[/tex]
[tex]80 = \frac{82+72+74+x}{4}\\\\320 = 228 + x\\\\x = 92[/tex]
Hence, She need 92% on her fourth test in order to have an average of 80% on the first four tests.
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Please read the picture and give me the answer pls ill give u brainliest if you give me the correct answer
Answer:
19.59 meters
Step-by-step explanation:
26 (sin 90) sin 37 / (sin 53) = 19.5924053
Solve -4x ≥ -8. Graph the solution.
Answer: x is less then or equal to 2
Step-by-step explanation:
divide -4x and -8 both by -4 to get x is greater then or equal to 2 and flip the sign to less then or equal then because your dividing by a negative number
Circle C has a center at (-2,10) and contains the point P(10,5). Which equation represents circle C?
Answer: D.
Step-by-step explanation:
To solve this problem, you first need to find the distance between the center and the point on the circle. This will give you your radius.
There are 12 units between -2 and 10 on the x-axis.
There are 5 units between 5 and 10 on the y-axis.
To find the distance of the slope, you can treat the distance as the hypotenuse and the distances of the two sides as your variables.
Using the Pythagorean theorem:
12^2 + 5^2 = 13^2. Your radius is 13 units long.
The equation for a circle is shown as the following:
[tex](x - h)^{2} + (y - k)^{2} = r^2[/tex]
Where the center is (h, k), and the radius is r.
When the center is at (-2, 10) and the radius is 13, then the equation is shown here:
[tex](x +2)^2 + (y - 10)^2 = 169[/tex]
Answer: D
Step-by-step explanation:
Which of the following is a prime number? 99, 53, 117, 121
Answer:
53
Step-by-step explanation:
99 can be divisible by 9, 11, 3, and 33. 117 can be divisible by 11 (11x11)
and 117 can be divisible by 1, 3, 9, 13, and 39.
Luke has 4 more than triples the number of model cars that Andrew has. Luke has 31 cars. How many cars does Andrew have? {Write and solve an equation}
Answer:
Andrew has 9 cars
Step-by-step explanation:
Let's start by defining what our unknowns are and how to name them:
For the number of cars Andrew has: let's use the letter A
For the number of cars Luke has: let's use the letter L
Not write the first sentence in mathematical terms:
"Luke has 4 more than triples the number of cars that Andrew has."
L = 3 * A + 4
The second phrase results on a very simple equation since it just states the number of cars that Luke has:
L = 31
Now we can combine these two equations by replacing the variable "L" in the first equation with the second equation and then solve for A:
L = 3 * A + 4
31 = 3 * A +4
31 - 4 = 3 * A
27 = 3 * A
A = 27/3
A = 9
Therefore, Andrew has 9 cars.
A paint can has a radius of 4 inches and a height of 15 inches. What is the volume of the paint can? Round to the nearest tenth.
Use 3.14 for
cubic inches
Answer:
[tex]V=753.6\ \text{inches}^3[/tex]
Step-by-step explanation:
Given that,
Radius of a paint can, r = 4 inches
Height of a paint can, h = 15 inches
We need to find the volume of the paint can. We know that the shape of a paint can is in the form of cylinder such that the volume of cylinder is given by :
[tex]V=\pi r^2h[/tex]
Substituting all the values we get
[tex]V=3.14\times (4)^2\times 15\\\\V=753.6\ \text{inches}^3[/tex]
So, the volume of the paint can is 753.6 cubic inches.
Can you help please
I don't think I can answer it
Answer:
Step-by-step explanation:
area=area of trapezium ABCD with parallel sides 6 ft and 4 ft separated by distance 4 ft.+ area of square CEGD
=1/2(6+4)×4+4×4
=1/2 (10)×4+16
=20+16
=36 ft²
Select each set of events that are independent.
Roll a number cube, then flip a coin
Roll two number cubes
Pick a green candy from bag, eat the candy, then pick a yellow candy from a different bag
Pick a Jack from a deck of cards, don't put it back, then pick a King from the same deck
Pick a blue candy from a bag, eat the candy, then pick a red candy from the same bag
Pick a yellow marble from a bag, don't put it back, pick a green marble from the same bag
which ones are independent?
Answer:
Options A, B and C are all independent events while the rest are all dependent events.
Step-by-step explanation:
Please kindly check the attached files for explanation.
Does the following list represent a complete probability model? Explain.
P(red) = 16 , P(yellow) = 13 , P(blue) = 112 , and P(green) = 12
Answer:
No
Step-by-step explanation:
No, the given list does not represent a complete probability model because the sum of the probabilities is not equal to 1.
The sum of probabilities should always equal to 1 in a complete probability model. In this case, the sum of probabilities is 16 + 13 + 112 + 12 = 153, which is not equal to 1. Therefore, it is not a complete probability model.
Final answer:
The provided list does not form a complete probability model because the probabilities do not sum up to 1, and some values exceed 1, which is not possible for probabilities.
Explanation:
The list provided does not represent a complete probability model because the probabilities of all possible outcomes of a probability model must sum up to 1. However, the sum of the probabilities listed (P(red) = 16, P(yellow) = 13, P(blue) = 1/12, and P(green) = 1/2) does not equal 1. The values for P(red) and P(yellow) seem to be mistakes or typos, as probabilities cannot be greater than 1. If these values were supposed to represent fractions and perhaps there are typos, they may need correcting to ensure the probabilities would sum up to 1. An example of a complete probability model can be seen in the jelly bean question mentioned, where the probabilities of selecting each color are fractions that sum up to 1.
110/12 = 55/z
a.6
b.8
c.10
d.400
Answer:
a. 6
Step-by-step explanation:
110/12 = 55/z
z = 55 × 12/110
z = 6
Simplify this exponent
10^6
Answer: [tex]10*10*10*10*10*10[/tex]
Since the exponent is 6 we'll write 10×10 6 times.
[tex]10^6=10*10*10*10*10*10[/tex]
[tex]10^6=1000000[/tex]
[tex]10*10*10*10*10*10=1000000[/tex]
is x greater than, less than, or equal to 50*
Answer:
c
Step-by-step explanation:
because they are opposites
An____solutions is a value that arises from the algebraic method of solving but is NOT a solution of the original
equation.
Answer: an infinity many solutions
Step-by-step explanation:
If a system has infinitely many solutions, then the lines overlap at every point. In other words, they're the same exact line! This means that any point on the line is a solution to the system.
Final answer:
An extraneous solution is a value that arises from the algebraic method of solving but is NOT a solution of the original equation.
Explanation:
An extraneous solution is a value that arises from the algebraic method of solving but is NOT a solution of the original equation. Extraneous solutions can occur when certain algebraic manipulations are performed that introduce additional solutions that are not valid in the context of the problem. For example, if we square both sides of an equation, we may introduce extraneous solutions. These extraneous solutions need to be identified and discarded when solving equations.
Plot V2 and V3 on the number line.
Which statements are true? Check all that apply.
O v2 <2
O v2 < V3
o 12 > 1.5
o 13 <3
o v is about 0.5 less than 13.
O v3 is about 0.3 greater than v2.
Answer:
Step-by-step explanation:
0.........................1.......V2..1.5..V3.....2........................3....................
V2 <2
V2<V3
12>1.5
V3 is about 0.3 greater than V2 (V3 =1,7...and V2=1,4...)
V? is about 0.5 less than 13 ( it is not complete)
Answer:A, B, D and F
Your welcome
Step-by-step explanation:
I just took it
RE-POST --> BRAINLIEST, THANKS, 5-STAR RATING IF YOU ANSWER! PLEASE HURRY!
Nini's (me) grade average in Science is a 96.7%. She has a project that is due that is worth 10% of her grade. If she gets a 0% on the project, what is her new grade average?
This actually very important that I know immediately, so please answer soon!
Answer:
93.76%
Step-by-step explanation:
93.76% should be your new grade
I'm not 100% sure but what I did is that I divided each percent you have by it's worth. So for example, 96% x 20% = 0.192
I did this with all the possible percents and then I made them into whole number. So the 0.192 became 192. Here I divided it by 5. I should've divided by 4 but since the project is a 0% I didn't have to add it, just use it to divide.
So here I had 117.2 then I multiplied it by 80% because that's the total percent all those grades equaled and got 93.76%
NEED ANSWER NOW!!!!!!!!!!
Which two ratios form a proportion?
A)
6/
9
and
3/
1
B)
6/
9
and
1/
3
C)
6/
9
and
2/
3
D)
6/
9
and
3/
2
Jay placed 32 seats in 4 rows for the debate. What is the unit rate of seats per row?
A)
4
B)
6
C)
8
D)
12
First Answer: C.
C is the answer, because when doing cross product with the proportion you get 18 for both answer meaning they are proportional since they both equal the same amount.
Second Answer: C.
The answer is C, because when you divide 32 and 4 you get 8 seats per row.
if it takes 33 pounds of sugar to make a cake what fraction of the cake can be ade with 11 pounds of sugar
Answer:
one third or 1/3
Step-by-step explanation:
Answer: 1/3 of the cake.
Step-by-step explanation: 33 divided by 3 is equal to 11, which makes 11 one third of 33.
An airline ticket states that the flight takes 2 hours and 45 minutes. The flight time is actually 2 hours and 54 minutes. What is the percent error in the flight time?
Answer:
5.45%
Step-by-step explanation:
Given:
An airline ticket states that the flight takes 2 hours and 45 minutes.
The flight time is actually 2 hours and 54 minutes.
Question asked:
What is the percent error in the flight time?
Solution:
As we know:
[tex]Percent\ error=\frac{Experimental\ value - Theoretical\ value}{ Theoretical\ value}} \times100[/tex]
Theoretical value = 2 hours and 45 minutes
1 hour = 60 minutes
2 hours 45 minutes = 60 [tex]\times[/tex] 2 + 45 = 120 + 45 = 165 minutes
Experimental value = 2 hours and 54 minutes
1 hour = 60 minutes
2 hours 54 minutes = 60 [tex]\times[/tex] 2 + 54 = 120 + 54 = 174 minutes
[tex]Percent\ error=\frac{174-165}{165} \times100\\ \\ Percent\ error=\frac{9}{165} \times100\\ \\ Percent\ error=\frac{900}{165} \\ \\ Percent\ error=5.45[/tex]
Thus, the percent error in the flight time is 5.45%
Answer:
Step-by-step explanation:
Question asked:
What is the percent error in the flight time?
Solution:
As we know:
Theoretical value = 2 hours and 45 minutes
1 hour = 60 minutes
2 hours 45 minutes = 60 2 + 45 = 120 + 45 = 165 minutes
Experimental value = 2 hours and 54 minutes
1 hour = 60 minutes
2 hours 54 minutes = 60 2 + 54 = 120 + 54 = 174 minutes
Thus, the percent error in the flight time is 5.45%
Help with C please!!
Answer: 2.3
Step-by-step explanation:
Once you add all of the numbers of shoes together you get 14 pairs. To find the mean, you have to divide the total number by the number of values which is 6.
i need help please asap
Answer:
5/6
Step-by-step explanation:
To add fractions the denominator (or lowest number must be the same)
They are not in this case, so we need to make it that way.
3 can be turned into 6 by multiplying by two. BUT REMEMBER, whatever you do to the top, you do to the bottom and vise versa.
[tex]\frac{2}{3} *\frac{2}{2} =\frac{4}{6}[/tex]
[tex]\frac{4}{6} +\frac{1}{6} =\frac{5}{6}[/tex]
Answer:
5/6
Step-by-step explanation:
I hope this is what you need
convert the following decimal into a percentage 0.4973
uuuuLITUNCION
Given the function f(x) = -2x2 + 3 over the closed
interval [-1, 2], what are the extreme values?
Minimum:
Maximum:
Answer:
Step-by-step explanation:
hello :
f(x) = -2x²+3
in : [-1, 2] f'(x) = - 4x
f'(x) = 0 means : -4x=0 so : x=0
f(0) = -2(0)²+3 = 3 (Maximum:) because : a= -2 and a<0
in : [-1, 0] f is crasing
in : [-1, 2] f is decrasing
Answer:
1.-5
2.3
Step-by-step explanation:
just did it
a recipe calls for 5 tablespoons of orange juice a can of orange juice is 11 fluid ounces how many tablespoons of juice are in a can
By using the conversion factor that 1 fluid ounce is equal to 2 tablespoons, an 11 fluid ounce can of orange juice contains 22 tablespoons of juice.
Explanation:To find out how many tablespoons of juice are in a can, we will use the given conversion factors. We know that 1 fluid ounce (fl oz) is equivalent to 2 tablespoons (tbsp). The can contains 11 fluid ounces of orange juice.
Multiply the number of fluid ounces in the can by the number of tablespoons per fluid ounce to find the total tablespoons in the can: 11 fl ozTherefore, there are 22 tablespoons of orange juice in a can.
The mean of 44, 47, y, 58 and 55 is 52. Find the value of y
Answer:
[tex] y= 56[/tex]
Step-by-step explanation:
[tex] \frac{44 + 47 + y + 58 + 55}{5} = 52[/tex]
[tex] \frac{204 + y}{5} = 52[/tex]
[tex]204 + y = 260[/tex]
[tex]y = 56[/tex]
The value of y is 56.
What is arithmetic mean?Arithmetic mean is often referred to as the mean or arithmetic average. It is calculated by adding all the numbers in a given data set and then dividing it by the total number of items within that set. Mean is the most commonly used measure of central tendency. It represents the average of the given collection of data.
Given here, the observations are 44,47,y,58,55 and the given mean is 52
then we can construct the equation:
44+47+y+58+55 /5 = 52
(y + 204) / 5 = 52
y + 204 =260
y = 56
Hence, The value of y is 56
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An inground swimming pool contains 2.3 times 10 Superscript 4 units of water. Which unit of measure was used?
Answer: gallons
Step-by-step explanation:
Answer:Gallons
Step-by-step explanation:
You got to think of a pool and then relate it to the other measurements
The opening in a rectangular door frame measures 9 feet by 3 feet. Each of the four doors described in the table measures 9
feet by 3 feet, but have different diagonal lengths. Which door will fit in the rectangular opening?
Door 1
Door 2
diagonal: 10 feet
Door 3
diagonal: 3/10 feet
Door 4
diagonal: 6
feet
diagonal: 12 feet
Door 1
Door 2
Door 3
Door 4
Answer:
Door 2
Step-by-step explanation:
b is the answer
Answer:
B
Step-by-step explanation:
door 2
If ↔w||↔v, find the measurement of angle b.
∠b =
Answer:
∠ b = 132°
Step-by-step explanation:
Since v and w are parallel.
The angle vertically opposite 48° is congruent , thus = 48°
b and 48° are same- side interior angles and supplementary, thus
b = 180° - 48° = 132°
Find the sum and product of the roots.
3x^2 - 4x-7 = 0
x1,x2(-1, 7/3)
to slove this you need the formula
from equation a=3 b=-4 c=7;
x=(-b±√b²-4ac)/2a
x=(4±√-4²-4×3×7)/2×3
x=(4±√100)/6
x=(4±10)/6
x1=4-10/6 x2=4+10/6
x1=-6/6 x2=14/6
x1=-1 x2=7/3
The sum of roots is 4/3, and the product of roots is -7/3 for the quadratic equation [tex]3x^2[/tex] - 4x - 7 = 0.
To find the sum and product of the roots of the quadratic equation [tex]\(3x^2 - 4x - 7 = 0\)[/tex], we can use Vieta's formulas.
Vieta's formulas state that for a quadratic equation of the form [tex]\(ax^2 + bx + c = 0\),[/tex] the sum of the roots [tex](\(r_1\) and \(r_2\))[/tex] is given by [tex]\(-\frac{b}{a}\),[/tex] and the product of the roots is given by [tex]\(\frac{c}{a}\).[/tex]
In your equation, [tex]\(a = 3\), \(b = -4\), and \(c = -7\).[/tex]
So, the sum of the roots [tex](\(r_1\) and \(r_2\)) is:[/tex]
[tex]\[r_1 + r_2 = -\frac{b}{a} = -\frac{-4}{3} = \frac{4}{3}\][/tex]
And the product of the roots [tex](\(r_1\) and \(r_2\)) is:[/tex]
[tex]\[r_1 \cdot r_2 = \frac{c}{a} = \frac{-7}{3}\][/tex]
So, the sum of the roots is [tex]\(\frac{4}{3}\)[/tex], and the product of the roots is [tex]\(\frac{-7}{3}\).[/tex]
25 % of __is 30
I forgot who do slove this bc of quartine :
Answer:
120
Step-by-step explanation:
its easy 25 might as well be 1/4 so 30+30+30+30=120
In a science class, Paula made a mixture by adding 2.05 milliliters of
hydrogen peroxide and 6.15 milliliters of water together. Equal amounts of
the whole mixture were poured into 5 empty containers. How much of the
mixture, in milliliters, did she pour into each container?
Answer:
1.64 ml
Step-by-step explanation:
2.05 + 6.15 = 8.2
8.2 / 5 = 1.64
Paula poured 1.64 milliliters of the mixture into each of the 5 containers after combining the volumes of hydrogen peroxide and water to get a total volume of 8.20 milliliters.
Explanation:To find the amount of the mixture Paula poured into each container, we first need to calculate the total volume of the mixture she made by adding the volume of hydrogen peroxide to the volume of water.
The total volume of the mixture is 2.05 milliliters of hydrogen peroxide plus 6.15 milliliters of water, which equals 8.20 milliliters. Since the mixture was evenly distributed into 5 containers, we divide the total volume by the number of containers.
Amount per container = Total volume / Number of containers
Amount per container = 8.20 milliliters / 5 containers
Amount per container = 1.64 milliliters
Therefore, Paula poured 1.64 milliliters of the mixture into each container.