Answer:
pen = 2 book = 3
Step-by-step explanation:
p= pens
b=books
4p +3b =17
5p+2b=16
Multiply the first by 5
Multiply the second by -4
Add both (p variable will ce cancelled)
20p +15b = 85
-20p -8b = -64
7b = 21
b=3 (book =3)
Lets plug this in one of the equations
4p + 3x3 = 17
4p +9 0 19
4p = 8
p= 2 (pencil = 2)
Suki has 10 rock songs, 11 dance songs 12
salsa songs and 7 classical songs on her
playlist. If Suki's music player randomly
selects a song from the playlist, what is the
experimental probability that the song will be
a classical song?
Answers MUST be written as a fraction only.
Answer:
7/40
Step-by-step explanation:
possible outcomes = 10+11+12+7 = 40
favourable outcome = 7
theoretical probability = favourable outcomes/possible outcomes
therefore, 7/40 is the answer
PLEASE HELP ILL MAKE BRAINLIEST
Answer:
56°
Step-by-step explanation:
180 = 40 + (2x) + (3x)
180 - 40 = 40 + 5x - 40
140/5 = 5x/5
x = 28
2(28)
= 56
Answer:
m∠A = 56°
Step-by-step explanation:
A triangle contains 180°. So
180 - 40 = 140
2x + 3x = 140
5x = 140
x = 28
Now, plug in the value for x.
2(28) = 56
Check your work.
40 + 56 + 84 = 180
what type of object is pictured below?
Answer: segment
Step-by-step explanation:
Answer:
B. Segment
Step-by-step explanation:
PLZZZ HELP MEEEEE!!!!
Answer:
She would use the mean.
Step-by-step explanation:
Hey can you help me fast!!
Answer:
I believe the answer would be -4 1/2.
A factory makes car batteries. The probability that a battery is 1/14. If 400 batteries are tested how many are defective
Answer:
1/14 of 400 batteries = 56 batteries
Step-by-step explanation:
[tex]400 \times 0.14[/tex]
Answer:
Actual: 28.57
Rounded: 29
Step-by-step explanation:
400/14 = 28.57
Round to nearest whole number: 29
Correct on A P E X
Question 3 (4 points)
Find the surface area of a sphere with a circumference of 172 mm. Round to the nearest tenth.
9416.9 mm
27.4 mm
4708.4 mm
749.4 mm
Answer:
a. 9,416.9 mm²
Step-by-step explanation:
Given:
Circumference of a sphere = 172 mm
Required:
Surface area of the sphere rounded to nearest tenth
Solution:
First, we need to determine the radius of the sphere since we know the circumference.
Circumference = 2πr
Plug in the value of the circumference
172 = 2*π*r
Divide both sides by 2π
172/2π = r
86/π = r
r ≈ 86/π
Next, find the surface area of the sphere
Surface area = 4πr²
plug in the value of r
Surface area = 4*π*(86/π)²
= 4*π*86²/π²
= 4*7,396/π
= 9,416.87967
≈ 9,416.9 mm² (nearest tenth)
the diagram shows a cuboid.what is the surface area of the cuboid
plz help
Answer:
202 cm
Step-by-step explanation:
You need to add the areas of the faces, and since it is a cuboid opposite faces are the same. If you do 2(5x9) + 2(4x9) + 2(4x5) you will get your answer.
Answer:
Hello Love! Answer: 202
Step-by-step explanation:
First off we have to do all 6 faces remember that each face will have a matching face that goes along with it so Imma start with the front face that would be 9 x 5 = 45 same for back face
Then ill do sides that will be 5 x 4 = 20 for both left and right sides Then ill do top and bottom
thats 4 x 9 = 36 Now ill add all of these up.
So 45 + 45 + 20 + 20 + 36 + 36 and that = 202
Dave's father is paying him to paint the storage
shed. Write a formula that will help them
decide how many cans of paint to buy.
Let's let
p = area covered by a can of paint
W = the total area of the walls
n = number of paint cans to buy.
Answer:
Number of paints to buy, n = The total area of the walls, W / Area covered by a can of paint, p
Step-by-step explanation:
Let's
p = area covered by a can of paint
W = the total area of the walls
n = number of paint cans to buy
Number of paints to buy, n = The total area of the walls, W / Area covered by a can of paint, p
That is,
n = W / p
If the total area of the walls = 100 m²
A can of paint covers 5 m². Find the number of cans of paint needed?
Number of paints to buy, n = The total area of the walls, W / Area covered by a can of paint, p
n = W / p
= 100 m² / 5 m²
n = 20 cans of paint
The inverse of x + y is ?
Answer:
y + x
Step-by-step explanation:
What is 528,492 rounded to the nearest thousand?
Answer: 528,000
Step-by-step explanation: to easy
What is an excess-3 BCD code? Which shortcoming of the 8421 BCD code is overcome in the excess-3 BCD code? Illustrate with the help of an example.
It is extremely significant for mathematical operations since it solves a problem with the 8421 BCD code that arises when adding two decimal digits whose total is more than 9.
In contrast to standard non-biased BCD or binary positional number systems, excess-3 arithmetic employs a distinct method.
What is Excess-3 Code?An Excess Code also written as XS3 is a code that is non-weighted. It is used to depict express decimal numbers.
Hence, in contrast to standard non-biased BCD or binary positional number systems, excess-3 arithmetic employs a distinct method.
Learn more about Excess-3 Code at;
https://brainly.com/question/1511370
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A girl throws a paper airplane from her treehouse. The height of the plane is a function of time and can be modeled by the equation ℎ()=25+2.5−122. Height is measured in feet and time is measured in seconds.
h(0) show the initial height of the plane, that is 25 feet.
The given equation is h(t)=25+2.5t-1/2 t².
Here, h(0)=25+2.5(0)-1/2 (0)²
h(0)=25
This shows the initial height is 25 feet.
Therefore, h(0) show the initial height of the plane, that is 25 feet.
To learn more about the function visit:
https://brainly.com/question/28303908.
#SPJ1
"Your question is incomplete, probably the complete question/missing part is:"
A girl throws a paper airplane from her treehouse. The height of the plane is a function of time and can be modeled by the equation h(t)=25+2.5t-1/2 t². Height is measured in feet and time is measured in seconds.
Evaluate h(0) and explain what this value means in this situation.
If n + n + 2 = 10, then n= ____.
Answer:
n = 4
Step-by-step explanation:
Combine like terms and solve.
n + n + 2 = 10
2n + 2 = 10
2n = 8
n = 4
The interior angles formed by the sides of a hexagon have measures that add up to 720°. What is the measure of angle F? Need HELP ASAP
Some plsss helppppppp
$ -50
Step-by-step explanation:
they gain no profit since they spent more money than they had
Answer:
$-50 dollars
Step-by-step explanation:
let me know if I'm wrong
According to the graph, what is the value of the constant in the equation
below?
Height=
Constant/Width
(4, 25)
(5, 20)
(10, 10)
(20,5)
Answer:
100
Step-by-step explanation:
x-value is width and y-value is height. Therefore if you multiply the height x width you get the constant.
The value of the constant in the equation is 100.
What is the graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and position of the points do not matter.
Given that, Height=Constant/Width
1) (4, 25)
Here, Height = 25 and Width = 4
25 = Constant/4
Constant = 100
2) (5, 20)
Here, Height = 20 and Width = 5
20 = Constant/5
Constant = 100
3) (10, 10)
Here, Height = 10 and Width = 10
10 = Constant/10
Constant = 100
4) (20, 5)
Here, Height = 20 and Width = 5
20 = Constant/5
Constant = 100
Therefore, the value of the constant in the equation is 100.
To learn more about the graph visit:
brainly.com/question/14375099.
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9 An exponential function is graphed on the grid.
V
20
18
16
14
112
6
2
1
2
3
4
5
6
7
Which function is best represented by the graph?
A g(x) = 6
= (3)
B g(x) = 6(3)*
C g(x) = 6 -
3
D g(x) = 6 -(3)*
I need help ASAP
Also I need to show work on it because it is for my homework
Answer:4.5
Step-by-step explanation:
Which sentence about measuring angles is true?
Answer:
The first option
Step-by-step explanation:
Im smart
a particle moves along a horizontal line. Its position function is s(t) for t>0. For each problem, find the velocity function v(t) and the acceleration function a(t).
s(t)=t^3-t^2-56t
Answer:
Answer is in a photo. I can only upload it to a file hosting service. link below!
bit.^{}
ly/3a8Nt8n
8/9 ÷ 2/3 - 5/6
step by step fast
Answer:
is 1/2 or .5
Step-by-step explanation:
I’ll give BRAINLIEST to best answer, please answer fast.
2 waffles =3$
2x4=8 waffles (How many waffles Sage wants)
3 + 3 + 3 + 3= 12 (or 3x4)
(2) (4) (6) (8)
12$ at I Scream
4 waffles= 4$
4 waffles x2=8$
8$ at Scoopz
12-8= 4
Sage would save 4 dollars if she got 8 waffles at Scoopz.I make $8 dollars per hour (H) for babysitting. I make a total (T) dollars babysitting on Saturday. In the space below, identify the Independent Variable (either H or T), the Dependent Variable (either H or T), and write an equation based on this information (include 8, H, T, and an = sign).
Answer: 8H=T
Step-by-step explanation:
8 is dependant on the hours so you put it together. Your independent
value is T since it is by itself. So your answer becomes.
8H=T
PLZ HELP!! brainliest and 40pnts
PT 1
Find the volume of a cone that has a radius of 1/2 and a height of 1.
a) 3/2 pi b) 3/4 pi c) 1/12 pi D) 1/6 pi
PT 2
Find the volume of a cylinder that has a radius of 1/2 and a height of 1.
a) 1/2 pi b) 1/4 pi c) 3/2 pi d) 4 pi
Answer:
PT 1: C
PT 2: B
Step-by-step explanation:
In order to find the volume of a cone use equation
[tex]V=\pi r^2\frac{h}{3}[/tex]
To find the volume of a cylinder use equation
[tex]V=\pi r^2h[/tex]
Sandra can run 3 miles in 20 minutes. How many minutes will it take her to run 7 miles?
Answer:
46.7 minutes to run 7 miles
Step-by-step explanation:
3 miles in 20 minutes boils down to the unit rate 3/20 miles/minute.
Multiply 7 miles by the unit rate (20/3 minutes/mile):
(7)(20)
---------- minutes, or approximately 46.7 minutes to run 7 miles
3
what is y=-3x-5 in standard form?
Answer:
3 x-y=5
Step-by-step explanation:
Solve for X PLEASE HELP DUE IN 10 MINS
Answer:
x = 4
Step-by-step explanation:
90 + 70 + 5x = 180
160 + 5x = 180
180 - 160 = 20
20 / 5 = 4
Find the probability that a student is not playing a sport or not taking a foreign
language using the Venn Diagram below.
Answer:
18/25
Step-by-step explanation:
Total number of students = 23+14+10+3 = 50.
14 out of 50 are playing sport and taking a foreign language.
So the answer is (50 - 14) / 50
= 36/50
= 18/25.
=========================================================
Explanation:
The wording your teacher provided is a bit strange in my opinion. Though I think they are referring to the people who aren't taking both classes at the same time, but they could be taking exactly one class.
We have 23+14+10+3 = 50 students total and 14 of them are taking both classes. So 50-14 = 36 students are taking exactly one class, or they are taking neither of the classes.
This leads to a probability of 36/50 = (2*18)/(2*25) = 18/25 which points to choice B as the answer.
------------------
Side note:
If it asked "what is the probability that a student is not taking a sport AND not taking a foreign language?", then the probability would be 3/50 because there are 3 people not taking either class out of the 50 total. So the keyword "and" is the change made here, instead of the "or".
Lynette has a metal doorstop with the dimensions shown.
Each cubic centimeter of the metal in the doorstop has a mass
of about 8.3 grams. Find the volume of the metal in the
doorstop. Then find the mass of the doorstop.
Volume = 105in³
Mass = 871.5g
To find the volume of the metal we can find the area of a base, and multiply it by the prism's width.
The base is 30cm in area, and the width is 3.5cm, which makes the volume 105in³
The mass of the doorstop can be found by just multiplying the grams per cubic centimeter by the volume, which would be 871.5g