Answer: Kyra must earn at least 100% on the final exam.
Step-by-step explanation: Kyra's scores have been accumulating from Q1 to Q4 and then the mid term exam. Her scores are outlined as follows;
Q1 = 92, Q2 = 85, Q3 = 88, Q4 = 84, mid-term = 89.
Observe carefully that the data set (number of observed data) is 5.
What she needs now is a final average score of at least 90% after her final exam. She can use this to determine what she needs to score in her final exam. In other words, now that she has a average score, all she needs is a total of all her scores up till her final exam. Note that after writing her final exam, the data set would be six and no longer five.
Before writing her final exam, Kyra's average score was calculated as;
Average = (92 + 85 + 88 + 84 + 89)/5
However after she must have written her final exam, her average would be calculated as;
Average = (92 + 85 + 88 + 84 + 89 + x)/6
Where average is given as 90 and x is the final exam score, you now have
90 = (438 +x)/6
90*6 = 438 + x
540 = 438 + x
Subtract 438 from both sides of the equation
102 = x
Therefore from the results shown, Kyra must score up to 102% in her final exam. However, knowing that she cannot obtain a score higher than 100%, we can conclude that she must score nothing less than 100% (a hundred percent) in her final exam.
A sphere with center A is shown. Which represents a radius?
B
С
A.
B. BC
C. DG
D.
FE
Answer:
Segment AD
Step-by-step explanation:
Radius is a line that goes half way. In other words, it starts anywhere, and ends at the center of the circle.
Answer:
AD
Step-by-step explanation:
The radius goes from the center of the circle to the outer edge
AD and AG are radii
The radius of a the head of a snowman is about 2/3 times the radius of the base of the snowman. If the surface area of the base of the snowman is 1800 square centimeters, what is the approximate surface area of the snowman's head?
Answer:
The approximate surface area of the snowman's head is 125.33 sq.cm.
Step-by-step explanation:
Formula of surface area =[tex]4 \pi r^2[/tex]
We are given that The surface area of the base of the snowman is 1800 square centimetres
So,[tex]4 \pi r^2 =1800[/tex]
[tex]4 \times \frac{22}{7} \times r^2 = 1800 \\r^2 = \frac{1800 \times 7}{22 \times 4}\\r=\sqrt{\frac{1800 \times 7}{22 \times 4}}\\r=11.96[/tex]
The radius of a the head of a snowman is about 2/3 times the radius of the base of the snowman
So, Radius of head = [tex]\frac{2}{3} \times 11.96 =7.97[/tex]
Surface area of snowman's head=[tex]4 \times \frac{22}{7} \times 9.97=125.33 cm^2[/tex]
Hence the approximate surface area of the snowman's head is 125.33 sq.cm.
What is the answer, please help!
Mr. Allen is planning a twenty question quiz worth 100 points. The quiz will contain True/False questions worth 3 points each and multiple choice questions worth 11 points each. a) How many multiple choice questions will be on the quiz? b) How many True/False questions will be on the quiz?
Answer:
a)5 b)15
Step-by-step explanation:
5 times 11=55
15 times 3 is 45
add together is 100
5+15 is 20 questions
if f(x) = 0.5(2 - x), what is the value of f(-2)?
Answer:
2
Step-by-step explanation:
f(-2)=0.5(2-(-2))=
0.5(2+2)=
0.5(4)=
2
Hope this helps!
What’s the answer for this? I’ve been stuck
Answer:
Step-by-step explanation:
compare with x²+y²+2gx+2fy+c=0
center is (-g,-f)
radius=√(g²+f²-c)
2g=-14
g=-7
2f=-12
f=-6
center is (7,6)
radius=√((-7)²+(-6)²-76)
=√(49+36-76)
=√(85-76)
=√9
=3
Select all expressions that are equivalent to 16x−12−24x+4. Show or explain your reasoning.
1. 16x - 12(1 + 2x) + 4
2. 40x - 16
3. 4 - 12 + (2x - 3x)
4. -8(x+1)
4.
PLEASE HELP!! WILL MARK BRAINLIEST!!
Answer:I believe the answer would be undefined because it has no slope.
Step-by-step explanation:
Answer To:
PLEASE HELP!! WILL MARK BRAINLIEST!!
Step-by-step explanation:
Unidentified
Caley builds a rectangular prism using 18 cubes that each measure 1 centimeter on each side. What could be the dimensions of her rectangular prism?
Answer:
18 i think
Step-by-step explanation:
Answer:
length: 2cm width: 3cm height: 3cm
Step-by-step explanation:
The volume has to equal 18 since we have 18 cubes measuring 1 cm
length: 2cm width: 2cm height: 3cm 2*2*3 = 12 not possible answer
length: 2cm width: 3cm height: 3cm 2*3*3 =18 answer
length: 3cm width: 3cm height: 3cm 3*3*3 27 not possible answer
length: 6cm width: 6cm height: 6cm 6*6*6 = 216 not possible answer
Help me please!! I will mark Brainliest!!!!
Answer:
D
Step-by-step explanation:
42 minus 31 is 11
so 11/42 = /100
Answer:
11/42 = x/100
Step-by-step explanation:
42 students and 31 are girls
42 -31 = 11 that is the number of boys
boys / total = x/100 to find the percent
11/42 = x/100
A bag contains green marbles and blue marbles, 36 in total. The number of green
marbles is 6 more than 4 times the number of blue marbles. How many green
marbles are there?
Answer:
30
Step-by-step explanation:
You first subtract 6 from 36 and then divide 30 by 5 to get 6 then multiply 6*4 then add back the 6 you originally subtracted
evaluate the function f(x) = 5x-3
Answer:
x = 3/5 = 0.600
Step-by-step explanation:
In the drawing, s>t. Which statement about the volumes of the two cylinders is true?
a.-The volume of the right-hand cylinder is less than the volume of the left-hand cylinder.
b.-The volume of the right-hand cylinder is greater than the volume of the left-hand cylinder.
c.-The two volumes are equal.
d.-There is not enough information. The actual measurements are not given.
Answer: A
Step-by-step explanation:
The correct statement about the volumes of the two cylinders is,
⇒ The volume of the right-hand cylinder is less than the volume of the left-hand cylinder.
What is Multiplication?To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.
Given that;
In the drawing,
s > t
Where, 's' is radius of left hand side cylinder and 't' is radius of right hand side cylinder.
We know that;
Volume of cylinder = πr²h
Hence, Volume is directly proportional to radius.
Larger the radius gives large Volume.
Hence, WE get;
The volume of the right-hand cylinder is less than the volume of the left-hand cylinder.
Thus, The correct statement about the volumes of the two cylinders is,
⇒ The volume of the right-hand cylinder is less than the volume of the left-hand cylinder.
Learn more about the multiplication visit:
https://brainly.com/question/10873737
#SPJ3
A manager that owns 3 local area Car Maintenance Garages was researching certifications of mechanics that worked for her company. Consider the following Venn diagram.
What is the probability that a randomly selected mechanic from her 3 garages is ASE certified to work on Brakes? A.3/5. B. 1/2. C. 2/9. D. 4/15
Answer:
B. 1/2
Step-by-step explanation:
In the picture attached, the Venn diagram is shown
amount of ASE certified brakes mechanics: 4+2+2+1 = 9
amount of mechanics: 4+2+2+1+3+3+3 = 18
The probability that a randomly selected mechanic is ASE certified to work on brakes: 9/18 = 1/2
Answer:
B. 1/2
Step-by-step explanation:
100 points
Find the Surface area of a right rectangular pyramid 50 points for explaining in full the equation of how.
L= 7
W= 5
H= 12
100 points explaining the equation for volume too.
Step-by-step explanation for Surface Area:
So, to find the surface area, you use the formula: [tex]A=lw+l\sqrt{(\frac{w}{2})^2 +h^2 } +w\sqrt{(\frac{l}{2})^2 +h^2 }[/tex]
I'll explain what each part means and why they are like that. (btw, it would help you more if you looked at a rectangular prism I added while you read the explanation :) )
First of all, you do lw because that is the base of the right rectangular pyramid (since you're finding the surface area, you need to find the area of all the surfaces on the pyramid)
You add [tex]l\sqrt{(\frac{w}{2})^2 +h^2 }[/tex] because now you're trying to find the triangular side with the length. You multiply the length, because that's how wide the "triangle" is. You do the square root because of the pythagorean theorem (since you're using the hypotenuse times the length to find that side). The width is divided by two, because as you can see in my attachments, that's how far away the height is from the length (if you look at the base, see where the height line drops in comparison to the length). (look at my second screenshot)
You add [tex]w\sqrt{(\frac{l}{2})^2 +h^2 }[/tex] for the same reason, except dealing with the width. You're finding the side with the width. You multiply the width by the hypotenuse of the right triangle (look at the third screenshot i attached). The length is divided by two because that's the distance between the bottom of the height line to the w.
I do believe that this should explain the meaning behind each piece of the formula (I'm not sure this is what you asked for lol but it does make understanding it a little easier, I think). To get the answer, you just substitute each variable with those values. So...
[tex]A=(7)(5)+(7)\sqrt{(\frac{(5)}{2})^2 +(12)^2 } +(5)\sqrt{(\frac{(7)}{2})^2 +(12)^2 }[/tex]
A ≈ 183.3
As for the Volume:
[tex]V=\frac{lwh}{3}[/tex]. I'm not 100% on why it's divided by three, but with any volume, you're always going to end up with an answer that is in cubed units. So that explains the three variables in the numerator. I'd like to think the three just has to do with the three variables, but I don't know. Give me the points if you'd like? I don't think this is a proper explanation though.
Good luck!
Answer:
volume = 140 cubic units
area = 183.3 square units
Step-by-step explanation:
I am going to assume we are dealing with a pyramid with a rectangular base. The rectangular base has length 7 units, width 5 units, and height 12 units.
Let's do the volume first since it's simpler.
Volume:
volume of pyramid = (1/3) * (area of base) * height
volume = (1/3) * 7 units * 5 units * 12 units
volume = 140 cubic units
Now we deal with the surface area.
The total surface area of a rectangular pyramid is the sum of the lateral area and the area of the base. The area of the base is the area of a rectangle. The lateral area is the sum of the areas of the 4 triangular sides. Each two opposite sides are congruent. For the base, we have the length and width of the rectangular base, so we can find the area easily.
For the 4 triangular sides, we need to find the the height of the triangles. Since each pair of opposite faces is congruent, we have two triangles we need to find the heights for. I'll call the heights "p" and "q". We use the Pythagorean theorem to find the heights of the triangular faces.
a^2 + b^2 = c^2
(3.5)^2 + (12)^2 = p^2
p^2 = 156.25
p = 12.5
(2.5)^2 + (12)^2 = q^2
q^2 = 150.25
q = 12.25765
Area of triangle = (1/2) * base * height
For two triangles, the base is 5 and the height is 12.5.
For the other two triangles, the base is 7 and the height is 12.25765.
total surface area = area of base + 2(area of triangle with base 5) + 2(area of triangle with base 7)
A = LW + 2(1/2)(base)(height) + 2(1/2)(base)(height)
A = 7(5) + 2(1/2)(5)(12.5) + 2(1/2)(7)(12.25765)
A = 183.3 square units
Please answer correctly !!!! Will mark brainliest !!!!!!!!
Answer:
A
Step-by-step explanation:
Notice how it points it out for the x coordinate, and the closed circle means that point is included, So it's the range of the smallest x coordinate to the greatest x coordinate.
David is the coach of the Bingtown Cougars hockey team. There are 2 minutes left in the game they are playing and they are currently losing by 1 point. In the past, when losing by 1 point, he has pulled the goalie out of the game and replaced the goalie with a forward player a total of 21 times. When in the same position, he has left the goalie in the game 14 times.
In the situations when he has pulled the goalie, they have lost 7 times, tied 8 times, and won 6 times. In the situations when he has left the goalie in the game, they have lost 8 times, tied 2 times, and won 4 times.
Based on these numbers, if the goal is to either tie or win the game, should he pull the goalie or not?
A.
There is not enough information to determine if he should pull his goalie or not.
B.
Neither option has any advantage.
C.
David should pull his goalie.
D.
David should not pull his goalie.
Answer:
A. There is not enough information to determine if he should pull his goalie or not.
Step-by-step explanation:
Although they won/tied more when he pulled his goalie they also played it more that way. Which means they must play it more the other way to have an even amount of tests.
can i get brainilest?
Which relation describes the graph?
Answer:
a
Step-by-step explanation:
Stephanie is comparing web sites for downloading music. One charges a $5 membership fee plus $0.50 per song. Another charges $1.00 per song but no membership fee. Which of the following shows the correct equation to find how many songs Stephanie would have to buy to spend the same amount on both web sites?
Answer:
0.50x+5=Website A
1.00x=Website B.
Step-by-step explanation:
She would need to buy 10 songs to have them equal the same.
Find the zeros of the function f(x)=x2+2x-3
Answer:
x = -1 and x = 3
Step-by-step explanation:
f(x)= x^2-2x-3
f(x) = (x + 1) (x - 3)
Therefore, x = -1 and x = 3
The zeroes of the quadratic function f(x) = x² + 2x - 3 will be 1 and negative 3.
What is a factorization?It is a method for dividing a polynomial into pieces that will be multiplied together. At this moment, the polynomial's value will be zero.
The quadratic equation is given as ax² + bx + c = 0. Then the degree of the equation will be 2.
The quadratic equation is given below.
f(x) = x² + 2x - 3
Then the factor of the quadratic equation will be
f(x) = x² + 2x - 3
f(x) = x² + 3x - x - 3
f(x) = x(x + 3) - 1(x + 3)
f(x) = (x + 3)(x - 1)
The zeroes of the function will be
f(x) = 0
(x + 3)(x - 1) = 0
x = 1, -3
Then the zeroes of the quadratic function f(x) = x² + 2x - 3 will be 1 and negative 3.
More about the factorization link is given below.
https://brainly.com/question/6810544
#SPJ5
need help ASAP What is the perimeter oftriangle ABC?
Answer:
17
Step-by-step explanation:
.................................
There are 2 brownie for 3 students. What is the amount of brownie that each student receives?
Answer:
0.66 repeating (2/3)
Step-by-step explanation:
Each student should receive 2/3 of a brownie, because if you do 0.66 times 3, (multiplying the number of students by the portion of brownie they receive, you get 1.98. Rounding up to 2, this will give each student the fairest amount of brownie.
An agriculture researcher wants to test the effect of nine soil additives by adding four at a time to different rows of the
same plant. How many different combinations can be tested?
756
126
63
Answer:
126
Step-by-step explanation:
Hope it helped :)
hurry will give brainliest
Answer: B
Step-by-step
<2 with the underline that mean that it can go up or down q
the <2t it goes up and -4 it goes down
remember that negative it goes down the line the positive it goes up
What is the value of x?
Answer:
x=4
Step-by-step explanation:
<K=30 degrees so LJ=4V2
LM=JM=x
so x^2+x^2=(4V2)^2=16*2=32
2x^2=32
x^2=16
x=4
The sum of three times a number and three less than the number is thirteen.
(As an equation)
Answer:
3+5x5-3=13
Step-by-step explanation:
ACION
A student claims that if you dilate the net for a cube using a scale factor of 2, the surface
area of the resulting cube is multiplied by 4 and the volume is multiplied by 8. Does this
claim make sense?
(select)
make sense.
Answer:Yes
Step-by-step explanation:
Given
Suppose side length of cube is a
If we dilate the cube using a scale factor of 2
Side length becomes 2a
and the surface area becomes [tex]=6(\text{side length})^2[/tex]
Surface area[tex]=6(2a)^2[/tex]
Surface area[tex]=4\times 6(a)^2[/tex]
Thus surface area multiplied by a factor of 4
Now for volume
[tex]V=(\text{side length })^3[/tex]
[tex]V=(2a)^3[/tex]
[tex]V=8(a^3)[/tex]
Therefore volume is multiplied by a factor of 8
Therefore the above statements make sense
what is the equation of this line
Answer:
Step-by-step explanation:
What is the equation of this line (eg)
Write each linear equation in standard form. a) y - 5 = -3 (x + 4) b) y = 2/3 x + 4
Given the linear equation 2x + 3y = 9. Determine the slope and y-intercept of the line. ...
Graph 4x - 3y = 12 by determining the intercepts.
Graph x + 4y = 8 by determining the intercepts.
Manny has two part-time jobs. One job pays $10/hour and the other pays $16/hour. ...
Answer:
x = 0
Step-by-step explanation:
The equation of a line is shown by using the formula y = mx+b
But, in special cases like this one, where the line is completely vertical then we use the same formula but we just adjust it.
When a line is completely straight up and down the equation is x = #
Since the line is on the y-axis (or has a x value of zero) the equation is x = 0.
There is no y in this equation because the line is hitting all values of y (which means y is ∞) with only 1 value of x. (As opposed to most equations where one or multiple values of y with one value of x or vise-versa.)
Will u b my friend
WILL GIVE BRAINLIEST FOR YES
Answer:
I'm down for a new friend
Step-by-step explanation:
sent the request
ᵤᵤ ᵧₑₛ
ᵘʳ ᵃⁿˢʷᵉʳ ʷᶦˡˡ ᵖʳᵒᵇᵃᵇˡʸ ᵍᵉᵗ ᵈᵉˡᵉᵗᵉᵈ ᵗʰᵒ
What is the volume of the cone.
Answer:
see below
Step-by-step explanation:
The volume of a cone is given by
V = 1/3 pi r^2 h
The radius is 5 and the height is 8
V = 1/3 pi ( 5)^2 (8)
V =200/3 pi ft^3
We can approximate by by 3.14
V =209.33333 ft^3
Or by using the pi button
V =209.4395102 ft^3