Answer:
64 2/7
Step-by-step explanation:
0.35x = 150
x = 3000/7
0.15(3000/7) = 450/7 = 64 2/7
The cost of a diamond varies as the square of its weight. A diamond weighing 20 decigrams costs Rs. 4,800. Find the cost of a diamond of the same kind weighing 8 decigrams.
Answer:
768
Step-by-step explanation:
let C represent cost and w weight, then the equation relating them is
C = kw² ← k is the constant of variation
To find k use the condition w = 20, C = 4800, that is
4800 = k × 20² = 400k ( divide both sides by 400 )
12 = k
C = 12w² ← equation of variation
When w = 8, then
C = 12 × 8² = 12 × 64 = 768
does anyone know how to solve
this problem? any help would be amazing please!!
Answer:
x = 60 and y = 100
Step-by-step explanation:
As shown in the table, you have: x + y = 160
Otherwise, you have x:y = 3:5 or x = 3y/5
=> 3y/5 + y = 160
or 8y/5 = 160
or y/5 = 20
or y = 20*5 = 100
=> x = 160 - y = 160 - 100 = 60
=> x = 60 and y = 100
Question 8 of 25
2 Points
Which of these statements is true for f(x) = 4×(7)^x?
A. It is always decreasing
O B. The y-intercept is (0, 1).
O C. The domain of f(x) is x > 0.
D. The y-intercept is (0,4).
SUBMIT
Answer: the y-intercept is (0,4)
Step-by-step explanation:
What can be determined from the table? Check all that
apply.
The independent variable is the number of gallons.
Liters is a function of Gallons.
The equation l = 3.79g represents the table.
As the number of gallons increases, the number of
liters increases.
This is a function because every input has exactly
one output
Answer:
a, b, d, e
Step-by-step explanation:
Independent var is the # of gallons: true (generally graphs go in indep, dep format)
liters is a function of gallons: true
l = 3.79g is false, as 1 liter is not 3.79 gallons, but the other way around
as the number of gallons increases, the number of liters increases: true because this function has a positive slope
this is a function because every input has exactly 1 output: true
A function assigns the values. All the statements are true.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
A.) The independent variable is the number of gallons.
The statement holds true, generally when a table is formed x is on the left side of the table which is an independent variable and y is on the right side which is the dependent variable.
B.) Liters are a function of Gallons.
The statement is true, generally when a table is formed x is on the left side of the table which is an independent variable and y is on the right side which is the dependent variable. And y is a function of x, similarly, liters is the function of gallons.
C.) The equation l = 3.79g represents the table.
The equation is true if we substitue the value of gallons in the place of g, the output will be the value of l. Thus, the equation is true.
[tex]\rm l = 3.79g\\\\l = 3.79(1\ gallons) \rightarrow l=3.79\ liters\\\\l = 3.79(2\ gallons) \rightarrow l=7.58\ liters\\\\l = 3.79(6\ gallons) \rightarrow l=22.74\ liters[/tex]
D.) As the number of gallons increases, the number of litres increases.
The statement holds true and can be observed in the table.
E.) This is a function because every input has exactly one output.
The statement holds true and can be observed in the table.
Hence, all the statements are true.
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heeeeeeeeeeeeeeeeelp
Answer:
230 cm squared
Step-by-step explanation:
Split the shape into a triangle and a rectangle
The area of a triangle is base x height / 2
20 x 9= 180/2= 90 (9 because you do 16-7 to find height of triangle)
Find the area of the rectangle=
7 x 20= 140
Add them up
140+90= 230cm squared
I hope this helped :)
Answer:
230 cm squared
Step-by-step explanation:
Question is attached below, Good Luck! I will Mark Brainliest for best answer!
Answer:
1960 cm^2
Step-by-step explanation:
Surface area:
Area of cross section x 2 = 1/2 x 20 x 21 x 2 = 420 cm^2
Area of slope = 29 x 22 = 638cm^2
Area of base = 22 x 20 = 440cm^2
Area of back = 21 x 22 = 462cm^2
Total Surface area = 462+440+638+420 = 1960cm^2
Hope this helps
Can you please help me?
Answer:
Area: 7, because there are 7 squares.
Perimeter: 14.
Step-by-step explanation:
A balloon initially has a volume of 45 L at sea level, where temperature is 25∘C and the pressure is 1.0 atm. It rises to an elevation of 2.0 km, where the temperature is 5.0∘C and the pressure is 0.78 atm. What is the balloon's volume at this height?
Answer:
53.8 L
Step-by-step explanation:
We can use the ideal gas formula that relates pressure, volume and temperature:
[tex]\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}[/tex]
where P1 = initial pressure = 1.0 atm
V1 = initial volume = 45 L
T1 = initial temperature = 25°C = 25 + 273 = 298 K
P2 = final pressure = 0.78 atm
V2 = final volume
T2 = final temperature = 5.0°C = 5 + 273 = 278 K
Therefore, the final volume will be:
[tex]\frac{1 * 45}{298} = \frac{0.78 * V_2}{278}\\\\0.151 = 0.002806 V_2\\\\=> V_2 = 0.151 / 0.002806\\\\V_2 = 53.8 L[/tex]
Its volume is 53.8 L
A coin in flipped 4000 times What is the probability that d will land I N tails
Answer:
250
Step-by-step explanation:
1000/4000
What value correctly fills in the blank so that the expressions are equivalent?
32 + 72 = х (4+ 9)
4
8
12
13
Answer:
8
Step-by-step explanation:
32 + 72 = 13x
104 = 13x
x = 8
Answer:
8
Step-by-step explanation:
32+72=x(4+9)
32+72=x(13)
104=13x
x=8
A principal of $2000 is placed in a savings account at 3% per annum compounded annually. How much is in the account after one year, two years and three years?
Answer:
Step-by-step explanation:
After one year
A=p(1+r/n)^nt
=2000(1+0.03/12)^12*1
=2000(1+0.0025)^12
=2000(1.0025)^12
=2000(1.0304)
=$2060.8
After two-years
A=p(1+r/n)^nt
=2060.8(1+0.03/12)^12*2
=2060.8(1+0.0025)^24
=2060.8(1.0025)^24
=2060.8(1.0618)
=$2188.157
After three years
A=p(1+r/n)^nt
=2188.157(1+0.03/12)^12*3
=2188.157(1+0.0025)^36
=2188.157(1.0025)^36
=2188.157(1.0941)
=$2394.063
Amount in account after one year, two and three years are respectively $2,060 , $2,121.8 and $2,185.45
Given:
Principal amount = $2,000
Rate of interest = 3% = 0.03
Amount in account after one year
A = P(1+r)ⁿ
A = 2,000(1+0.03)¹
A = 2,000(1.03)¹
A = 2,000(1.03)
A = $2,060
Amount in account after two year
A = P(1+r)ⁿ
A = 2,000(1+0.03)²
A = 2,000(1.03)²
A = 2,000(1.0609)
A = $2,121.8
Amount in account after three year
A = P(1+r)ⁿ
A = 2,000(1+0.03)³
A = 2,000(1.03)³
A = 2,000(1.092727)
A = $2,185.45
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which is not an equation of the line going through (6 7) and (2 -1)
Answer:
d.
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
just did it
Please help me I posted this 10 times and no one helped me they were saying how I was so dumb
Answer:
Just count the unit squares
Step-by-step explanation:
If you learn this they may call u dumb but if your beginner then count the squares
At the beach, 20% of people have white towels and 58% have blue towels. If
the rest have red, what percentage of the people at the beach have red
towels?
Answer: 22%
Step-by-step explanation: First, you have to add the percetages of the white and blue towels.
20+58=78
Now, you can simply subtract 78% from 100% to get your answer, 22%
if tom spins the spinner 80 times work out an estimate for the number of times the spinner will land on 3 please help me
Answer:
The estimated number of times the spinner will land on 3 is 20.
Step-by-step explanation:
The complete question is:
A four-sided spinner is provided. If Tom spins the spinner 80 times then work out an estimate for the number of times the spinner will land on 3.
Solution:
Assume that the four-sided spinner is unbiased.
That is all the four outcomes are equally likely to be selected.
The probability that the spinner lands on any of the four numbers is:
P(1) = P (2) = P (3) = P (4) = 0.25
It is provided that Tom spins the spinner n = 80 times.
The spinner can land on any of the four numbers independently.
The random variable X, defined as the number of times the spinner lands on 3, follows a Binomial distribution with parameters n = 80 and p = 0.25.
The expected value of X is:
[tex]E(X)=np[/tex]
[tex]=80\times 0.25\\=20[/tex]
Thus, the estimated number of times the spinner will land on 3 is 20.
1. Miguel is playing a game in which a box contains four chips with numbers written on them. Two of the chips have the number 1, one chip has the number 3, and the other chip has the number 5. Miguel must choose two chips, and if both chips have the same number, he wins $2. If the two chips he chooses have different numbers, he loses $1 (–$1). a. Let X = the amount of money Miguel will receive or owe. Fill out the missing values in the table. (Hint: The total possible outcomes are six because there are four chips and you are choosing two of them.) b. What is Miguel’s expected value from playing the game? c. Based on the expected value in the previous step, how much money should Miguel expect to win or lose each time he plays? d. What value should be assigned to choosing two chips with the number 1 to make the game fair? Explain your answer using a complete sentence and/or an equation.
Answer:
To check all the events (6), we label the chips. Suppose one chip with 1 is labeled R1 and the other B1 (as if they were red and blue). Now, lets take all combinations; for the first chip, we have 4 choices and for the 2nd chip we have 3 remaining choices. Thus there are 12 combinations. Since we dont care about the order, there are only 6 combinations since for example R1, 3 is the same as 3, R1 for us.
The combinations are: (R1, B1), (R1, 3), (R1, 5), (B1, 3), (B1, 5), (3,5)
We have that in 1 out of the 6 events, Miguel wins 2$ and in five out of the 6 events, he loses one. The expected value of this bet is: 1/6*2+5/6*(-1)=-3/6=-0.5$. In general, the expected value of the bet is the sum of taking the probabilities of the outcome multiplied by the outcome; here, there is a 1/6 probability of getting the same 2 chips and so on. On average, Miguel loses half a dollar every time he plays.
please mark me brainliest :)
A line is defined by the equation y = negative x + 3. Which shows the graph of this line?
Answer: The answer would be A.
The coordinates of the line are (0, 3) and (3, 0) hence, the line will pass through these points so, option A is correct.
What is graph?A graph is a structure made up of a collection of things, where some object pairs are conceptually "connected." The items are represented by mathematical abstractions known as vertices, and each pair of connected vertices is referred to as an edge.
Given:
y = negative x + 3
The above phrase can be written as,
y = -x + 3
Calculate the slope as shown below,
Slope = -1
The x-intercept can be calculated as,
0 = -x + 3 (y is zero at the x-axis)
x = 3
The x-intercept can be calculated as,
y = 0 + 3 (y is zero at the x-axis)
y = 3
Mark the coordinates (0, 3) and (3, 0) on the graph and join the points you will get the graph.
The graph is attached below.
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Janet and Nadia each play basketball. Nadia has won twice the number of games Janet has. Is it possible for Janet to have won 10 games if the sum of the games Nadia and Janet have won together is 24?
Yes; Janet could have won 10 games because 3x = 24.
Yes; Janet could have won 10 games because 2(10) is less than 24.
No; Janet could not have won 10 games because 2x ≠ 24.
No; Janet could not have won 10 games because 3x ≠ 24.
Answer:
no, janet could not have won 10 games because 3x is not equal to 24
Step-by-step explanation:
if janet won twice as many as nadia that means nadia times 2
so it would be 20 to add both nadia and janet it would be over 24 therefore the answer is d
hope this helps
Answer: No; Janet could not have won 10 games because 3x ≠ 24
Step-by-step explanation:
Janet and Nadia won 30 games together. 10x2(10)=30
! !
—
6x + 1 ≥ 13 can u please solve this please i am stuck on it
Answer:
x ≥ 2
Step-by-step explanation:
Step 1: Isolate x
6x ≥ 12
Step 2: Divide both sides by 6
x ≥ 2
And we have our answer!
Answer:
x ≥ 2
Step-by-step explanation:
6x+1 ≥ 13
Subtracting both sides by 1
6x ≥ 13-1
6x ≥ 12
Dividing both sides by 6
=> x ≥ 2
Fred spent 1 ¼ hours studying for his exam. He spent ¼ of this time studying for measurement, how many hours did Fred spend studying for measurement? *
Homework help, no need to explain answer
Answer:
Square each side
Subtract 1 from each side
Divide by 3
Step-by-step explanation:
sqrt(3x+1) = 4
Square each side
(sqrt(3x+1))^2 = 4^2
3x+1 = 16
Subtract 1 from each side
3x+1-1 = 16-1
3x= 15
Divide by 3
3x/3 = 15/3
x = 5
Need help ASAP please
Answer:
-6,6
Step-by-step explanation:
x^2=36
6*6=36
-6*-6=36
FOR 15 POINTS I WILL GIVE BRAINLEST IF YOU ARE CORRECT! What is the solution to the system that is created by the equation y = 2 x + 10 and the graph shown below? On a coordinate plane, a line goes through (negative 2, 0) and (0, 2). (–8, –6) (–4, –2) (0, 2) (2, 4)
The solution point is (4,2).
Step-by-step explanation:
Equation of straight line passing through the points (0,0) and (4,2) is given by
⇒ 2y = x ............ (1)
And the other straight line is y = - x + 6 .............. (2)
Now, solving equations (1) and (2) we get, y = - 2y + 6
⇒ 3y = 6
⇒ y = 2
And from equation (1) we get, x = 2y = 4
Therefore, the solution point is (4,2). (Answer)
Answer:
(-8,-6)
Step-by-step explanation:
This is the real answer for this question and this is a image of the graph
What is the greastest number of acute angles that a triangle can contain?
Answer:
3 acute angles.
Step-by-step explanation:
Triangles have three angles. If any one angle is obtuse or right-angle, then the remaining two angles must be acute. Or else, all the 3 angles can be acute.
An example can be an equilateral triangle because it has 3 acute angles. Each angle is 60 degrees.
Peggy has four times as many quarters as nickels she had $2.10 in all how many nickels and how many quarters did she have
Answer:
There are 8 quarters and 2 nickels
Step-by-step explanation:
4 quarters for every 1 nickel
This means that for every 1 dollar, there are 5 cents
Double the statement above
1.05 x 2 = 2.10
There are 8 quarters and 2 nickels
Expand and simplify . 2xy(5y-3x)-6xy(4y-2x) PLEASE HELP. BEST ANSWER RECIEVES A BRIANLIEST
Answer:
6x²y-14xy²
Step-by-step explanation:
2xy(5y-3x)-6xy(4y-2x)
opening brackets
=10xy²-6x²y-24xy²+12x²y
=10xy²-24xy²-6x²y+12x²y
=-14xy²+6x²y
=6x²y-14xy²
Answer:
[tex]6x^2y-14xy^2[/tex]
Step-by-step explanation:
[tex]2xy(5y-3x)-6xy(4y-2x)[/tex]
[tex]2xy(5y)+2xy(-3x)-6xy(4y)-6xy(-2x)[/tex]
[tex]10xy^2-6x^2y-24xy^2+12x^2y[/tex]
[tex]-6x^2y+12x^2y+10xy^2-24xy^2[/tex]
[tex]6x^2y-14xy^2[/tex]
can someone help please
Brainliest question I need asap
Answer:
DF = 75
FBE = 105
FC = 60
CBE = 45
DAC = 225
ABE = 135
ABF = 120
what is the slope of the graph
Answer:
-1/3
Step-by-step explanation:
the slope is always run over rise.
In this case we ran 1 spot to the right from where the line crosses the y axis and then 3 down.
so that gives us 1/3 but since the line is negative, the slope is also negative
Simplify 16-3(8-3)^2÷5
Answer:
1
Step-by-step explanation:
PODMAS:-
16-3(8-3)²/5
=16-3(5)²/5
=16-3(25)/5
=16-3(5)
=16-15
= 1
Answer:
65
Step-by-step explanation:
=> [tex]\frac{16-3(8-3)^2}{5}[/tex]
=> [tex]\frac{13(5)^2}{5}[/tex]
=> [tex]\frac{13(25)}{5}[/tex]
=> 13 × 5
=> 65