If 20% of a number is 28 and 25% of the same number is 35, find 45% of that
number.
amelia paid 360 for a watch after he had been allowed a discount 10% discount what was the marked price of the watch? and also put the formula
Answer:
$396
Step-by-step explanation:
you would use this formula:
X(how much you paid) * %(whatever the discount is), then add whatever you get from this to X, and that will be how much it was originally marked for.
Find the inverse of the matrix (if it exists). (If the answer does not exist, enter DNE in any cell of the matrix.)
Answer:
[tex]\begin{pmatrix}-15&-28\\ -8&-15\end{pmatrix}[/tex]
Step-by-step explanation:
[tex]\begin{pmatrix}a\:&\:b\:\\ c\:&\:d\:\end{pmatrix}^{-1}=\frac{1}{\det \begin{pmatrix}a\:&\:b\:\\ c\:&\:d\:\end{pmatrix}}\begin{pmatrix}d\:&\:-b\:\\ -c\:&\:a\:\end{pmatrix}[/tex]
This is the formula we will use. Accordingly:
[tex]=>\frac{1}{\det \begin{pmatrix}-15&28\\ 8&-15\end{pmatrix}}\begin{pmatrix}-15&-28\\ -8&-15\end{pmatrix}[/tex]
det represents the determinant
if the determinant is 0 then only the inverse matrix will not exist. So let's find the determinant.
[tex]\det = \left(-15\right)\left(-15\right)-28\cdot \:8\\ = 1[/tex]
Now we multiply the following matrix by 1/1:
[tex]\frac{1}{1}\begin{pmatrix}-15&-28\\ -8&-15\end{pmatrix} = \begin{pmatrix}-15&-28\\ -8&-15\end{pmatrix}[/tex]
1. Which of the following descriptive statistics is
LEAST affected by extreme values?
A. Mean
B. Median
C. Standard deviation
D. Range
Help me cuz yah gurl gotta test UwU
Answer:
got u
Step-by-step explanation:
pls help me with this?
Answer:
C. 3
Step-by-step explanation:
A^2+B^2=C^2
A^2+4^2=5^2
A^2+16=25
A^2=9
A=3
I need help.... ......................
Answer:
7/5
Step-by-step explanation:
The distance between these two points is the slope. Move up 7 and over 5 to get to the next point.
Someone plz help meeee
Step-by-step explanation:
b and c
...................
Answer:
B.) 20.020
C.) 20.02
D.) 20.2
Step-by-step explanation:
2 x 10 = 20
2 x 1/100 + 20 = 20_1/50
20 x 50 + 1 = 1001
1001/50 = 20.02
or
20.2 (the 0 does not need to be there because the answer is the same without it.)
or
20.020 (the last 0 does not need to be there because the answer is the same without it.)
ill mark brainliest please help
Answer:
56 cups
Step-by-step explanation:
56 cups=3.5 gallons
what does 6 × 9 + 6 + 9 equal? :)
A classroom with an area of 500 square feet has room for 30 students. A classroom with an area of 1,500 square feet has room for 80 students.
A. Write the relationship of students to square feet, for the smaller classroom, as a ratio and as a fraction in its simplest terms.
B. Write the relationship of students to square feet, for the larger classroom, as a ratio and as a fraction in its simplest terms.
C. The original ratios of students to square feet in the two classrooms are not equal. How many students can the larger classroom hold to make its ratio of students to square feet equal to that of the smaller classroom?
Answer:
17ft, 1 student
Step-by-step explanation:
are 3:6 and 6:3 equivalent?
Answer:
No
Step-by-step explanation:
3:6 is a ratio saying for every 3, there's 6, or just convert them into fractions, like 3:6 is 3/6 and 6:3 is 6/3,
so is 3/6 = 6/3, no so they aren't equivalent
I need help with this
Answer:
its d
Step-by-step explanation:
the slope is -20 because for every 30 seconds the altitude gets smaller by 600 feet. 600/30=20 so its going down 20 feet per second.
Please Please Please Help me with this math problem
Answer:
y=10(3/4)^x
10 and 3/4
Step-by-step explanation:
what is (h - 5)(h - 8)
Answer:
h^2-13h+40
Step-by-step explanation:
(h-5)(h-8)
h^2-5h-8h+40
h^2-13h+40
Find the surface area of the prism.
Amelia bought a violin that was on sale for 15% off. If the original price was
$220 what is the sale price? *
O $15
O $33
O $187
O $253
Can I get an answer to these? I feel asleep during a zoom class and I didn't hear what he said and now I'm confused.
Calculate the vapor pressure (in torr) of a solution containing 0.2 moles of solute dissolved in 10 moles of water at 25°C. Vapor pressure of pure water at 25°C is 23.8 torr. Enter text here Enter 2021 Acellus Corporation. All Rights Reserved. C
Answer:
the vapor pressure of a solution at 25°C that contains 76.6 g of glucose (180.2 g/mole) in 250.0 mL of water. The vapor pressure of pure water at 25°C
Step-by-step explanation:
your answer is: 22.9 torr at 25°C
Explanation:
When a non volatile solute is added to a pure solvent, the vapour pressure of the mixture decrease regard to the pure solvent following the equation
Where vapour pressure of the pure solvent (Water) is 23.8torr at 25°C.
Mole fraction of water is the ratio between moles of water and total moles in solution. The solution has a mole fraction of water of:
Replacing in Raoult's law:
Vapor pressure of the solution is 22.9 torr at 25°C
hope this helps!
GURRY FOR BRAINLEIST PLS HURRY
Answer:
C= 10.6
Step-by-step explanation:
AB^2=AC^2+CB^2
C^2=7^2+8^2
C^2= 113
√113=10.630
The length of a rectangle is 4 4 times the width. The area is 64 64 square centimeters. Find the length and width of the rectangle.
Answer:
Width of a rectangle = 4 cm
Length of a rectangle = 16 cm
Step-by-step explanation:
Let width of a rectangle be [tex]x[/tex] cm.
The length of a rectangle is 4 times the width.
Length of a rectangle [tex]=4x[/tex] cm
Area of rectangle [tex]=64[/tex] square centimeters.
Also,
Area of rectangle = length × breadth
[tex]64=4x(x)\\64=4x^2\\16=x^2[/tex]
± [tex]x=4[/tex]
Being a dimension, [tex]x[/tex] can not be negative.
So,
[tex]x=4[/tex] cm
Width of a rectangle = 4 cm
Length of a rectangle = 4(4) =16 cm
HELPPPP PLSSS IM FAILING MATHHH
Answer:
The answer is C
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
if you see where the red line ends on the right side it is at 170 on the protractor
Which of the following is the midpoint of segment
AB
given that
A(−5,12) and B(3,−8)
Answer:
(-1, 2)
Step-by-step explanation:
Finding the midpoint of a line, having been given two points, is like finding the average coordinate of those two points.
To find the average x coodinate (and hence the midpoint's x coordinate), you have to sum the x coordinates and divide by 2 - like finding the mean.
To find the y coordinate, sum the y coordinates and divide by two.
[tex](x,y) = (\frac{-5+3}{2} , \frac{12+-8}{2} )[/tex]
Answer:
Step-by-step explanation:
(12 - 8)/2 = 4/2 = 2
(-5 + 3)/2 = -2/2= -1
(-1, 2) midpoint
1. 36.19 to the nearest tenths
Answer:
36.2
Step-by-step explanation:
Answer:
36.20
Step-by-step explanation:
it's basiclaly another word for 1 decimal place. 9 is bigger than 5 so it rounds 1 to 2.
what is (p−5)−(4p−7)?
Answer:
the answer is − 3 + 2
Compare and Contrast: Two equations are listed below. Solve each equation and compare the solutions. Choose the statement that is true
about both solutions. (2 points)
Equation 1 Equation 2
5x - 61 = -41 17x + 131 = 27
оа
Equation 1 has more solutions than equation 2.
Ob
Equation 1 and Equation 2 have the same number of solutions.
ос
Equation 2 has more solutions than Equation 1.
Od
The number of solutions cannot be determined.
Answer:
equation 2
Step-by-step explanation:
Solve 0 = x2 + 6x + 13 by completing the square.
A. x = 5 and x = 1
B. x = 3 + i22−−√ and x = 3 − i22−−√
C. x = −1 and x = 1
D. x = −3 + 2i and x = −3 − 2i
Answer:
x = -3 - 2i and x = -3 + 2i
Step-by-step explanation:
I was too lazy to complete the square but solved it on WolframAlpha
What number is missing from this factor tree for the prime factorization of 456?
Please and thank you
Answer:
Following are the solution to the given question:
Step-by-step explanation:
In this question, the steps are not defined, that's why its solution can be defined as follows:
Given value:
The prime factorization of 456:
[tex]\to 456= 2 \times 2 \times 2 \times3 \times 19[/tex]
Answer:
19
took same test
Find the number that makes the ratio equivalent to 2:9. 6:
What is decimal and percent for 3/1000
Answer:
.003 .03%
Step-by-step explanation: