Can someone help me
Answer: the third one
Step-by-step explanation:
For example, Emily received a 67 on her first economics exam, which counts for 20% of her grade; an 84 on her second exam, which counts for 30% of her grade; and a 78 on her third exam, which counts for 50% of her grade. What is her weighted average in the class
Answer:
77.6
Step-by-step explanation:
Given the data:
Weighting :
First exam = 20% ; second exam = 30% ; third exam = 50%
Scores :
First exam = 67 ; second exam = 84 ; third exam = 78
Weighted Average :
Σ(Weight * Score)
Σ[(0.2 * 67) + (0.3 * 84) + (0.5 * 78)]
13.4 + 25.2 + 39
= 77.6
Based on the weights assigned to these grades, Emily's weighted average in the class would be 77.6 marks.
Emily's weighted average= ∑ (Percentage of grade x Score in exam)
Solving gives:
= (20% x 67) + ( 30 % x 84) + (50% x 78)
= 13.4 + 25.2 + 39
= 77.6
Emily's weighted average is 77.6 marks.
Find out more on weighted average at https://brainly.com/question/14432034.
Convert 14 pounds to ounces in standard algorithm
Answer:
244
Step-by-step explanation:
14 x 12 = 244
14 lb 224 oz
hope it helped i just looked it up and this is what i got
Time is 5.3 hours in rate is 35.0 mph what is the distance
Answer:
185.5 miles
Step-by-step explanation:
Use the formula d=rt
distance = rate x time
d = 35(5.03)
d = 185.5 miles
Answer:
185.5
Step-by-step explanation:
In △LUV, UV¯¯¯¯¯¯¯¯=UL¯¯¯¯¯¯¯ and the measure of ∠U=42.6°. The measure of ∠L=(3x+y)°and the measure of ∠V=(4x−3y−0.8)°. Find the value of x.
21.2
18.8
40.4
32.1
Answer:
x = 34.06
Step-by-step explanation:
The sum of angles in the triangle LUV is 180 degrees
Given
∠L=(3x+y)°
∠U=42.6°
∠V=(4x−3y−0.8)°
Since ∠L+∠U + ∠V = 180 degrees
Substitute:
3x+y + 42.6 + 4x - 3y - 0.8 = 180
7x - 2y - 41.8 = 180
7x - 2y = 221.8 ... 1
Since UV = UL, hence the triangle is isosceles and <V = <L
3x+y = 4x-3y - 0.8
-x +4y = -0.8
x - 4y = 0.8 ....2
From 2: x = 0.8+4y
Substitute into 1:
7x - 2y = 221.8
7(0.8+4y) - 2y = 221.8
5.6 + 28y-2y = 221.8
26y = 221.8-5.6
26y = 216.2
y = 8.32
Get x
x = 0.8+4y
x = 0.8+4(8.32)
x = 0.8 + 33.26
x = 34.06
Note that it was assumed that <V = <l since the question is not clear
Solve the problem by entering and solving the equation.
Jenny earned 100 of a possible 132 points on a test. She lost 4 points for each incorrect answer. How many
incorrect answers did she have?
What’s the equation? Pls help
Look at the picture above to see the question
Answer:
132-4x=100 there are 8 incorrects
Find the volume, in cubic feet, of the composite solid below, which consists of a pyramid sitting on top of a cube. The pyramid has the same base as the cube.
Answer:
2,112 ft³
Step-by-step explanation:
Volume of composite solid = volume of pyramid + volume of cube
✔️Volume of square pyramid = ⅓(a²)*h
Where,
a = 12 ft
h = 8 ft
Plug in the values
Volume of pyramid = ⅓(12²)*8 = 384 ft³
✔️Volume of cube = a³
Where,
a = 12 ft
Plug in the value
Volume of cube = 1728 ft³
✔️Volume of composite solid = 384 + 1728 = 2,112 ft³
what is the triangles congruence theorem could you use to prove the triangle ADE is congruent to Triangle CDE
A) side angle side triangle congruence
B) angle side angle triangle congruence
C) side side side triangle congruence
D) side side angle triangle congruences
Answer:
I belive its A
Step-by-step explanation:
because it cant be b c nor d
Answer:
B
Step-by-step explanation:
A and C are congruent and so is AE and CE and E has congruent angles AKA angle side angle
What is the formula for slope?
Will give brainliest for first correct.
Answer:
To solve the problems in this lesson, students use the slope formula, which states that m = (y2 -- y1) / (x2 -- x1). The slope formula can be read as "slope equals the second y coordinate minus the first y-coordinate over the second x-coordinate minus the first x-coordinate".
Hope helps
where is the point ( 0,-4) located on the coordinate plane
A. on the y-axis
B. in Quadrant 3
c. on the x-axis
d. in quadrant 4
Answer:
A
Step-by-step explanation:
If you plot the point on a cartesian plane you see it is on the y axis
Answer:
D
Step-by-step explanation:
Similar triangles ABC and DEF are shown on the coordinate plane line t passes through points B, E, F, and C
Slope of BC = AB/AC, and Slope of EF = DE/DF
BC and EF both lie on the same line t, therefore the slope of BC equals the slope of EF.
What are Similar Triangles?Similar triangles are two triangles having the same shape but different sizes, however, the ratio of their corresponding sides are equal.
How to Find the Slope of a LineSlope = change in y / change in xSlope between any two points on the same line are the same.Given:
ΔABC ~ ΔDEF
Slope of BC = AB/AC
Slope of EF = DE/DF
BC and EF both lie on the same line t, therefore the slope of BC equals the slope of EF.
Learn more about similar triangles on:
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plz solve for brain thing.
surry. im new
Answer:
1. 1/4 because rectangle B takes up 1/2 of the space and the two triangles together take up 1/4.
2. 1/2, because it is twice as big as C, which takes up 1/4 of the space.
3. 1/8, because both A and D together take up 1/4 of the space, and they are both the same size
4. 1/3, because the triangles around it each take up 1/6 of the space
5. 1/6, because it is half as large as square J, which takes up 1/3 of the space
Step-by-step explanation:
(hope this helps!)
The answers to each part is mentioned below.
What is trapezoid? A trapezoid, also known as a trapezium, is a flat closed shape having 4 straight sides, with one pair of parallel sides. The parallel sides of a trapezium are known as the bases, and its non-parallel sides are called legs.
Given is a trapezoid as shown in the image.
[A] -
The fraction is given by the ratio of square area and the trapezoidal area as -
{A(Square)/A(Trapezoid)} = A(C)/A(X)
[B] -
The fraction is given by the ratio of rectangle area and the trapezoidal area as -
{A(Rectangle)/A(Trapezoid)} = A(R)/A(X)
[C] -
The fraction is given by the ratio of triangle area and the trapezoidal area as -
{A(Triangle)/A(Trapezoid)} = A(T)/A(X)
[D] -
Total area of the figure [Z] → A{Z} = 4 x (1/2) x a x a = 2a².
Area of a square [J] → A{J} = a²
The fraction is given by the ratio of square area and the area of the image -
{A(square)/A(Z)} = a²/3a² = 1/3
[E] -
The fraction is given by the ratio of a triangle area and the area of the image -
{A(triangle)/A(Z)} = {a²/2}/3a² = 1/6
Therefore, the answers to each part is mentioned above.
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Which of the following accurately shows the range of the function defined below?
a. [3, 00)
b. [2,00)
c. [3,6]
d. (-00,00)
(00 is infinite
Given:
A piecewise function
[tex]f(x)=\begin{cases}3 &,x<0 \\ x^2+2 &,0\leq x<2 \\ \dfrac{1}{2}x+5 &,x\geq 2 \end{cases}[/tex]
To find:
The range of the function.
Solution:
Range is the set of output values.
For [tex]x<0[/tex], the function is [tex]f(x)=3[/tex] ...(i)
For [tex]0\leq x<2[/tex], the function is [tex]f(x)=x^2+2[/tex].
[tex]0\leq x<2[/tex]
Squaring each side.
[tex]0^2\leq x^2<2^2[/tex]
Adding 2 on each side.
[tex]0+2\leq x^2+2<4+2[/tex]
[tex]2\leq f(x)<6[/tex] ...(ii)
For [tex]x\geq 2[/tex], the function is [tex]f(x)=\dfrac{1}{2}x+5[/tex].
[tex]x\geq 2[/tex]
Divide both sides by 2.
[tex]\dfrac{1}{2}x\geq 1[/tex]
Adding 5 on each side.
[tex]\dfrac{1}{2}x+5\geq 1+5[/tex]
[tex]f(x)\geq 6[/tex] ...(iii)
From (i), (ii) and (iii), it is clear that the values of f(x) lies in the interval [2,∞).
So, the range of the given function is [2,∞).
Therefore, the correct option is b.
correct answer is B
Life is a high way i wan to drive it all night long.
i GUIVEEREEEE BRAINLILSTTT
Answer:
The answer is 26cm
Step-by-step explanation:
what I did was that I divide 130/5 which gave me 26
Answer:
F: 52 cm
Step By Step Answer:
130 divided by 5 equals 26
26 times 2 equals 52
Make x the subject of the formula w − y x = z
Answer:
hmm ..
just transfer the X at the right side and others on left side
Step-by-step explanation:
so you get
w-z = yx
so later
(w-z)/y = x
The required value of x for the equation w - yx = z is (w - z)/y.
What is an equation?An equation is a combination of different variables, in which two mathematical expressions are equal to each other.
The given equation is,
w - yx = z
Solve to determine the value of x,
Subtract w from both the sides,
w - yx - w = z - w
-yx = z - w
Multiply with -1 both the sides,
yx = w - z
⇒x = (w - z)/y
The value of x for the given equation is (w - z)/y.
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In the figure below, ma = 7x + 5 and mb = 28x. The angles are
supplementary
Find the ma
b
a
40 degrees
140 degrees
35 degrees
5 degrees
Step-by-step explanation:
Since the 2 angles are supplementary,
(7x + 5°) + 28x = 180°.
=> 35x + 5° = 180°
=> 35x = 175°
=> x = 5°.
Hence Angle A = 7(5°) + 5° = 40°.
Samantha is trying to determine the volume of a soda can for her science project which of the following statement describes as a mentor to calculate the correct volume of the soda can?
Answer:
it would be the 2nd option
Step-by-step explanation:
the volume of a soda can is like finding the volume of a cylinder. (The volume of a cylinder is (π r^2 x h) 3.14 times the radius squared, times the height.)
WILL GIVE BEAINLIEST!!! Read the paragraph from a narrative. What is the purpose for using descriptive language in the paragraph? Entering the hallway, I inched by the hurling, squawking mass of kids. The sound was deafening as everyone reconnected from their summer apart. A million eyes on my back looked right through me. I was invisible. O It provides a picture of the hallway that reflects the character's mood. O It uses a simile to make the point that the hallway is crowded. O It offers sensory details that create a sense of anticipation. It shows how alone the character feels in the crowded hallway.
Answer:
d
Step-by-step explanation:
got itt right
Answer:
D
Step-by-step explanation:
What is the volume of the rectangular prism?
Answer:
V=whl
Step-by-step explanation:
Answer:63yd
Step-by-step explanation:
You have to count the first row of blocks which is 7 then side blocks which is 3
3x7 is 21
Then how many are in the top row going down which is 21x3 =63
he incomplete table above summarizes the number of left-handed students and right-handed students by gender for the eighth grade students at Keisel Middle School. There are 5 times as many right-handed female students as there are left-handed female students, and there are 9 times as many right-handed male students as there are left-handed male students. if there is a total of 18 left-handed students and 122 right-handed students in the school, which of the following is closest to the probability that a right-handed student selected at random is female? (Note: Assume that none of the eighth-grade students are both right-handed and left-handed.)
A) 0.410
B) 0.357
C) 0.333
D) 0.250
Answer: A
Step-by-step explanation:
When you solve this system of equations, you get x=10 and y=8. Thus, 5*10, or 50, of the 122 right-handed students are female. . The data in the table above were ... The incomplete table above summarizes the number of left-handed students ... students by gender for the eighth-grade students at Keisel Middle School. There are 5 times as many right-handed female students as there are left-handed female ...
Answer:*stalks* thank u fo the free points daddy pig AY MAMI TURN AROUND lol i needa stop *T POSE* I AM THE T POSE BIS
Step-by-step explanation:
Since last week, the change in value of Nicki’s favorite comic book was −$24. Which statement BEST describes the meaning of this change in value? The comic book is now worth $24.
Answer:
that the priced dropped 24 dollars or decreased
lindsey made 400 tarts. she sold 3/5 of them in morning and 1/4 of the remainder in the afternoon. how many tarts did she sell in the afternoon?
Answer:
40 tarts
Step-by-step explanation:
Lindsey had 400 tarts to start with, then she sold off 3/5 of them. Hence find the number of tarts left (2/5 of the original amount). Then she sold 1/4 of the remaining tarts. Therefore, find 1/4 or 2/5 of 400. The equation would be;
[tex](\frac{1}{4})(\frac{2}{5})(400)[/tex]
Now one just has to solve the equation;
[tex]\frac{1}{10}(400)[/tex]
40
A = (-7,-2) and B = [-3,-2)
A u B =
Answer:
Step-by-step explanation:
https://web.gccaz.edu/~johwd63181/MAT142/chapter_1/solutions/section%201.4%20solutions.pdf
x + 3 = -x - 5 Solve
Answer:
x = -4
Step-by-step explanation:
x + 3 = -x - 5
subtract 3 from each side
x = -x - 8
add x to each side
2x = -8
divide 2 on each side
x = -4
Dan makes several smoothies using 3 4/5 cups blueberries for every 2 2/3 cups of strawberries. Using these ratios, how many cups of blueberries will he need for 5 1/3 cups of strawberries?
Answer:7 3/5
Step-by-step explanation: 3 4/5 blueberries = 2 2/3 strawberries
? blueberries =5 1/3 strawberries
do 3 4/5 times 5 1/3 which gives you 20 4/15.Now divide 20 4/15 by 2 2/3 which gives you 7 72/120 and you can simplify to 7 3/5.
Hope it helps . :)
Answer:
I made this so you can give the other guy brainlyeist.
Step-by-step explanation:
Carly needed to study for 5/6 of an hour for 9 days. How many hours did she study?
Answer:
180 hours
Step-by-step explanation:
24 hrs in a day
5/6 of 24 is 20 and multiply it by 9 because there are 9 days
=180
Answer:
its 180 houe=rs i agree
Step-by-step explanation:
Convert each part of the ratio 2:3 to percentage
I GIVE BRAINLILSTTTT
Answer:
The answer is H please brainleist :) have a good day!
Step-by-step explanation:
-1/4 + -3/8
show your work
Answer:
1 3/4, or 1.75
Step-by-step explanation: -0.25 + - 1.5 = 1.75
Which of the following statements are NOT true?
Answer:
3.the slope of AB is different than the slope of BC
Step-by-step explanation:
It's not true because both of the slopes of the lines are equal which is 2/3