Answer:
Step-by-step explanation:
Well, he completed 12 questions, so he has 18 left.
To get the solution, we are looking for, we need to point out what we know:
We assume, that the number 30 is 100% - because it's the output value of the task.
We assume, that x is the value we are looking for.
If 30 is 100%, so we can write it down as 30=100%.
We know, that x is 40% of the output value, so we can write it down as x=40%.
Now we have two equations:
1) 30=100%
2) x=40%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
30/x=100%/40%
Now we just have to solve the equation.
30/x=100/40
(30/x)*x=(100/40)*x - we multiply both sides of the equation by x
30=2.5*x - we divide both sides of the equation by (2.5) to get x
30/2.5=x
12=x
x=12
now we have:
40% of 30=12
Then, you need to subtract 12 from 30 to figure out what is left.
estion
Carmen, Goran, and Henry have a total of
$
127
in their wallets. Henry has
4
times what Goran has. Carmen has
$
7
more than Goran. How much does each have?
Answer:
Carmen is $ 27, Henry is $ 80, and Goran is $ 20.
Step-by-step explanation:
be Carmen's money "c", Goran's "g" and Henry's "h"
Now, we organize the equations and we are left with:
c + g + h = 127
h = 4 * g
c = g + 7
replacing in the main one we have:
g + 7 + g + 4 * g = 127
6 * g = 127 - 7
g = 120/6
g = 20
now replacing:
h = 4 * 20 = 80
c = 20 + 7 = 27
therefore, Carmen is $ 27, Henry is $ 80, and Goran is $ 20.
A piece of equipment costs $50,000 new, but depreciates 15% per year in each succeeding year.
Find its value after 10 years.
Answer:
-$25,000
Step-by-step explanation:
15% of $50,000 is $7,500 Therefore..
10 x $7,500 = $75,000 ( 10 being the amount of years and 7500 being the 15% )
$50,000 - $75,000 = -$25,000
Hope this helps!!
-Conrad
A debate team consists of five girls and four boys. (Everyone is distinguishable.) How many ways can they stand in line, so that at least two of the girls are standing next to each other?
Answer:
9!-2880 = 360000.
Step-by-step explanation:
What is the area of the shape below
Answer:
The answer is 886.
You need to find the area of each specific shape and then add them together.
19 * 11 = 209, which is the area of the rectangle in the middle.
34 * 16 = 544, which is the area of the rectangle on the bottom of all the other shapes.
Now the triangle is a little more complicated. It only gives you the length of both the triangle and the rectangle combined, so first you need to subtract the length of the rectangle.
25 - 11 = 14, which is the length of the triangle.
Next, to find the area of a triangle, you need to multiple the length times the height and then divide it by two. 14 * 19 = 266. Divide 266 by 2 and you get 133.
Now, like I said earlier, add all of these together.
544 + 209 + 133 = 886.
The probability that Rahul succeeds at any given free-throw is 70%, percent. He was curious how many free-throws he can expect to succeed in a sample of 15 free-throws.
He simulated 30 samples of 15 free-throws where each free-throw had a 0.7, probability of being successful.
Rahul counted how many free-throws were successful in each simulated sample. Here are his results:
(picture attached)
Use his results to estimate the probability that he succeeds at 11 or fewer free-throws in a sample of 15 free-throws. Give your answer as either a fraction or a decimal.
P(11 or fewer sucessess) =
Answer:
0.2
Step-by-step explanation:
i took the test on khan academy :D
The probability of the number of times from the result that he got 11 or fewer free throws is; P(11 or fewer sucessess) = 0.2
How to find probability of success?
We are told that he simulated 30 samples. From the dot plot, we can see how many times he got 10 free throws, 11 free throws, 12 free throws, 13 free throws, 14 free throws, 15 free throws.
Now, from the dot plot, the number of times that he had 11 or fewer free throw successes is 6 times.
Thus;
P(11 or fewer sucessess) = 6/30
P(11 or fewer sucessess) = 1/5
P(11 or fewer sucessess) = 0.2
Read more about Probability at; https://brainly.com/question/25870256
Identify the type of regression that returns the equation y = x^2 + 7x - 15.
A. linear
B. quadratic
C. exponential
D. power
Answer:
B. quadratic
Step-by-step explanation:
The equation y=x^2+7x-15 is a quadratic equation. It might be the result of a quadratic regression.
_____
The descriptors "linear," "quadratic," "exponential," and "power" describe the sort of equation that is used to try to match the data. Quadratic regression returns a quadratic equation.
~Help me with this please!
I will mark as BRANLIEST!
(Look at the attachment)
Answer:
You will find the answer from my explanation.
Step-by-step explanation:
Let the cost of one small shirt be x
And that of a large shirt be y
From the expression above;
4x + 14y = 210; since the total cost of a small shirt by Wili is;
4 * x and the large shirts 14 * y
Similarly for Jordan we have:
12x + 11y = 110; since the total cost of a small shirt by Jordan is;
12 * x and the large shirts 11 * y
We now have two equations,
So you can solve both equations now using elimination method;
If you multiply all the variables of x and y in the first equation by 3 and then subtract the second equation from it, x would be eliminated remaining y;
Multiplying the first equation we have;
12x + 42y = 630
- 12x + 11y = 110
------------------------------
0. + 31y = 520
You can continue from there
If p represents “a number is divisible by 2,” q represents “a number is odd,” and r represents “a number is even,” what does this statement imply?
WILL MARK BRAINLIEST!!!!
Answer:
B
Step-by-step explanation:
idk y but still ur teacher can't do anything
A company that manufactures toy trains is making a new box car. To fit on the track, the smallest dimensions of the toy box car must be 2 inches. What should the length and the height of the toy if the company wants the toy box car to be geometrically similar to an actual box car with the dimensions shown?
PLEASE HELP!!!
Answer: figures not drawn to scale a. length = 12 inches, height = 3 inches b. length = 14 inches, height = 3 inches c. length = 21 inches, height = 5 inches d. length = 37 inches, height = 5 inches reset next previous 1 next similar solids: mastery test submit test tools info all rights reserved.
Step-by-step explanation:
I need help please look at the picture and tell me what x equals thank you.
Answer:
X= 72
Step-by-step explanation:
(x-2)+ (x-2)+(x-2) = 180°
or, 3x - 36 = 180°
or, 3x = 180+36
or, 3x = 216
or, x =216/3
or, x = 72°
What is the circumference of a circle with a radius of 91 mm? (use 22/7 for pi; show your work in numbers)
Answer:
571.77 is the correct answer because
C=2πr=2·π·91≈571.76986
What is the reason called when you switch sides of an equation?
Answer:
Possibly Symmetric Property?
Step-by-step explanation:
Answer:
PSP maybe?
Step-by-step explanation:
What angle measures have tangent 1
Step-by-step explanation:
the angle should be 60°
In an insect colony, there are 270 insects after 7 days. If there were initially 80 insects, how long will it take the population to grow to 700 insects?
Step-by-step explanation:
Total insects = 270
Days = 7
If 80 insects to 700 insects
Days = 700 ÷ 80 = 8.75
It will take 8.75 days
Which of the following is used to name a segment that has an endpoint at point A and another endpoint at point B?
You would write AB with a horizontal line segment over the letters A and B
So you would write this [tex]\overline{AB}[/tex]
If you cannot draw that on your computer, then I would stick to saying "segment AB".
line segment is used to name a segment that has an endpoint at point A and another endpoint at point B
What is a line segment ?
A line segment is a part of line that is bounded by two distinct end points , and contains every point on the line that is in between its endpoint .
since , in question it is given that their are two end points A and B then, it will form a line segment named AB
the answer is line segment
learn more about line segment :
https://brainly.com/question/25727583?referrer=searchResults
#SPJ2
THE PLANE DESCENDED 25 FEET PER
SECOND FOR 7 SECONDS. WHAT WAS
THE PLANES CHANGE IN ELEVATION?
Answer:
175 ft
Step-by-step explanation:
25 x 7= 175
how to find the scale factor of triangles
Answer:
you pick similar sides from both the triangles and try and divide or find common multiples. for ex if the sides are 3 and 9, you can find that the scale factor is 3 since 9/3 is 3
Step-by-step explanation:
If a is 3 and c is 12, then 4ac equals
Answer:
144
Step-by-step explanation:
4ac=
4(3)(12)=
144
Hope this helps!
what is the distance between -45 and -98 on a number line
Answer:
53
Step-by-step explanation:
Joshua and Noah go to the movie theater and purchase refreshments for their friends.
Joshua spends a total of $74.75 on 9 drinks and 4 bags of popcorn.
Noah spends a total of $18.00 on 2 drinks and 2 bags of popcorn.
Write a system of equations that can be used to find the price of one drink and the price of one bag of popcorn.
Using these equations, determine and state the price of a bag of popcorn, to the nearest cent
Answer:
Formula is y=mxtb try to plug it in
Step-by-step explanation:
Formula is y=mxtb try to plug it in
Nick's science class is observing the growth rate of a tomato plant. The tomato plant grows 3 cm every week for 12 weeks. What is the total growth of the tomato plant during these 12 weeks?
Answer:
36 cm
Step-by-step explanation:
Because the plant is growing the same amount each week you would take 12(3) and get 36 cm at the end of the 12 weeks.
Hana has decided to purchase a new car. She decides to put 15% down and finance the remaining balance. The bank offers Hana a 48 month loan at 6.76%. If the car is valued at $28,000, what will her monthly payments be?
Answer:
667.38
Step-by-step explanation:
28,000 loan amount
4 years
6.76%
Answer:
a.
$567.27
Step-by-step explanation:
Edge 2020
Por que es importante estudiar quimica
Answer: Se necesitan conocimientos de química para desarrollar la producción química y mejorar la calidad de vida de las personas. El uso competente del conocimiento químico permite a la humanidad resolver los problemas más importantes de nuestro tiempo: alimentos, energía y medio ambiente.
Step-by-step explanation:
sharonda is plotting quardrilateral pqrs on the graph below. she will plot the fourth and final vertex, s, at (9,5). what will be the length of the side ps?
Step-by-step explanation:
test answer just testing the app not sure of the answerCarol is a pet groomer whose yearly gross pay is $45,000. Her exemptions total $4,000 and the state tax rate is 3.5%. How much does she pay in state taxes each month?
Answer:
$119.58
Step-by-step explanation:
We expect Carol's annual tax bill to be the difference of her pay and exemption, multiplied by the tax rate:
annual tax = ($45,000 -4,000) × 0.035 = $1,435
Then her monthly tax bill will be 1/12 of this:
monthly state tax = $1435/12 = $119.58
Carol pays $119.58 in state taxes each month.
PLEASE HELP!!!!
Which choices are equivalent to the expression below? Check all that apply.
5^2 • 5^9
Answer:
D & E
The ones you chose are correct.
Divide. 21,382.62 ÷ 10,000
Answer:
the answer is 2.138262
Step-by-step explanation:
hope this helps
Please Help.... 50 points.
Answer:
94
Step-by-step explanation:
Answer:
94 is the answer
Step-by-step explanation:
If you can buy 6 bulbs of elephant garlic for $18 then how many can you buy with $54?
Answer:
18 bulbs for $54
Step-by-step explanation:
if we get 6 bulbs for $18
we can keep going
12 bulbs for $36
18 bulbs for $54
or we can divide 54 by 18 and get 3
then we multiply 3 by 6 and get 18 bulbs :)
if im correct may i please get brainliest
Answer:
18 bulbs
Step-by-step explanation:
let x number of bulbs can be bought for $54.
[tex]\frac{6}{18} =\frac{x}{54} \\\frac{1}{3} =\frac{x}{54} \\\\3x = 54\\x =\frac{54}{3} \\x=18[/tex]
The value of a piece of equipment is decreasing at a rate of 7,5% yearly. If the equipment
was valued at $930 when it was purchased, which function represents the value of the
equipment x years after it was purchased? Explain,
Answer:
y=930 x 075^x
Step-by-step explanation:
y is the price after the amount of years x being plugged into the equation. 930 is what you started with. 7.5 is what is being decreased so divide that by 100 and you get 0.075 plug in the amount of years into x and you have your equation