Raina, Trey, and Deandre have a total of $145 in their wallets. Raina has $10 more than Trey. Deandre has 3 times what Raina has. How much do they have in their wallets?
Trey, Raina, and Deandre have $21,$31, and $93 in their wallets respectively.
From the question the sum of the money in their wallets is:
Raina + Trey +Deandre=$145
R + T + D =$145................(i)
Raina has $10 more than Trey= ($10 + T)
Deandre has 3 times more Raina =3($10 + T)
substituting the values of Raina and Deandre in Eqn (i) we have
R + T + D =$145
($10 + T) + T +{3$(10 + T)}=$145
$10 +T +T+ $30 + 3T =$145
5T +$40 = $145
5T = $145 - $40
5T = $105
T = $105/5
T = $21
i.e Trey = $21
Raina has $10 more than Trey= ($10 + T)
i.e = ($10 + $21)
Raina =$31
Deandre has 3 times more Raina =3($10 + T)
=3($10 + $21)
=$30 +$63
Deandre =$93
Therefore the total sum of money in thier wallet is:
Raina + Trey +Deandre=$145
$31 + $21 + $93= $145
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Consider a linear function where
F(-10)=64 and f(15)=54
Find the equation
The equation is f(x) = -0.4x + 60. The solution has been obtained by using slope - intercept form.
What is slope-intercept form?
The graph of the equation y = mx + b is a line with a slope of m and a y-intercept of b. The form of the linear equation is called the slope-intercept form, and the values of m and b are real integers.
We are given that f(-10) = 64 and f(15) = 54.
So, we get the points as (-10 , 64) and (15 , 54)
Using the slope intercept form, we get
Slope(m) = (54 - 64)/(15 + 10)
Slope(m) = -0.4
We know that y = mx + b
For calculating b. we will put in the values
⇒64 = -0.4(-10) + b
⇒64 = 4 + b
⇒b = 60
From this we get the equation as
f(x) = -0.4x + 60
Hence, the equation is f(x) = -0.4x + 60.
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What is the slope of the line that passes through the points (-9, 8)(−9,8) and (-21, 10) ?(−21,10)?
Answer:
slope=-1.5
Step-by-step explanation:
Round 4,929 to the place value of the underlined digit. 9
Answer:
4,900
Step-by-step explanation:
if it is 4 or less it stays the same
if it 5 or more add 1 more
3x - y = 1; D: (-3, -1, 0, 4)
Graph each function for the given domain
Evaluating the function in the values of the domain we will get some coordinate pairs. The graph of these is in the image at the end.
How to graph the function in the given domain?Here we have the function:
3x - y = 1
And we want to graph this in the domain (-3, -1, 0, 4)
To do so, we need to evaluate the function (the values of x) in the values of the domain.
Solving the equation for y we get:
y = 3x - 1
Now, when x = -3
y = 3*-3 - 1 = -10
when x = -1
y = 3*-1 - 1 = -4
when x = 0
y = 3*0 - 1 = -1
When x = 4
y = 3*4 - 1 = 11
So we have the points (-3, -10), (-1, -4), (0, -1), (4, 11)
The graph of these points is on the image below.
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The cost, c, of paper towels, based on the number of rolls, r, is given by this equation.
c=1.29r
What is the unit rate of the cost of the paper towels in dollars per roll?
Enter your answer as a decimal, like this: 42.53
\(\\ \sf\longmapsto c=1.29r\)
cost is 1$\(\\ \sf\longmapsto 1=1.29r\)
\(\\ \sf\longmapsto r=\dfrac{1}{1.29}\)
\(\\ \sf\longmapsto r=0.7\)
Cost of 0.7 rolls is 1Cost of 1 roll
\(\\ \sf\longmapsto \dfrac{1}{0.7}\)
\(\\ \sf\longmapsto \dfrac{10}{7}\)
\(\\ \sf\longmapsto 1.4\$\)
How do you convert 4/20 into a decimal
Answer:
Inieterlov
Step-by-step explanation:
Si un electrón no consume, ni libera energía el átomo se encuentra enSi un electrón no consume, ni libera energía el átomo se encuentra en
Answer:
0.2
Step-by-step explanation:
Divide the numerator by the denominator
At a baseball game a vendor sold a combined total of 136 sodas and hotdogs. the number of soda sold was three times the number of the hotdogs sold. find the number of sodas in the number of hotdogs sold
Answer:
Step-by-step explanation:
Let's call the number of hotdogs sold "x". According to the problem, the number of sodas sold is three times the number of hotdogs sold, or 3x.
We know that the total number of sodas and hotdogs sold is 136. So we can set up an equation:
x + 3x = 136
Simplifying this equation, we get:
4x = 136
Dividing both sides by 4, we get:
x = 34
This means that 34 hotdogs were sold. To find the number of sodas sold, we can multiply the number of hotdogs sold by 3:
3x = 3(34) = 102
So, 102 sodas were sold.
2 fifths - negative 3 fifths
Answer:
yes
Step-by-step explanation:
How many times did the team score less than 60 points?
Stem
4
5
6
7
Leaf
2,5,9
3,4,6,8,8,9
0,2,3,4,4,6,8
0,0,1,2
Compute 292,000 divide 100.
The division 292,000 divide 100. results to 2920.
What is Division?Repetitive subtraction is the process of division. It is the multiplication operation's opposite. It is described as the process of creating equitable groups. When dividing numbers, we divide a larger number down into smaller ones such that the larger number obtained will be equal to the multiplication of the smaller numbers.
Given:
292,000 divide 100.
We know division with zero in the denominator is different and easy.
As, 292000 have three and 100 have two zeroes.
So, the two zero of hundred cancels out the two zeroes of 292000.
So, 292000/ 100
= 2920
Hence, the division results to 2920.
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Combine the like terms to create an equivalent expression.
10k+1+8k+2=10k+1+8k+2
3. My divisor is 8.
I am less than 30.
I am greater than 3 X 8.
My remainder is 5.
What dividend am I?
Answer: 29
Step-by-step explanation:
29 ÷ 8 = 3 remainder: 5
I solved using long division.
Answer:
29
Step-by-step explanation:
30
24
5
8x3=24
24+5= 29
Beacuase it had to be smaller than 30
If 3 is subtracted from 5 times a number, the result is the same as 9 added to the number. Find the number.
A.)4
B.)-4
C.)3
D.)-3
Answer:
c).3
Step-by-step explanation:
let the number be x
5x-3=x+9
collect like terms
5x-x=9+3
4x= 12
divide both sides by 4
x=3
the number is 3
Sound is measured in decibels, using the formula d=10log(p/p0) where p is the intensity of the sound and p0 is the weakest sound the human ear can hear. A horn has a decibel warning of 20. how many times more intense is this horn compared to the weakest sound heard to the human ear?
Solving the given logarithmic equation, it is found that the horn is 100 times more intense compared to the weakest sound heard to the human ear.
What is the equation for the sound in decibels?The equation is given by:
\(d = 10\log{\frac{p}{p_0}}\)
In which:
d is the intensity of the sound in decibels.p is the intensity of the sound.\(p_0\) is the weakest sound that the human ear can hear.In this problem, we have that d = 20, and we have to solve the logarithmic equation for p to find how many times more intense the sound is:
\(d = 10\log{\frac{p}{p_0}}\)
\(20 = 10\log{\frac{p}{p_0}}\)
\(\log{\frac{p}{p_0}} = 2\)
The logarithm is inverse of the function \(10^x\), hence we apply the function to both sides to find the ratio.
\(\frac{p}{p_0} = 10^2\)
\(\frac{p}{p_0} = 100\)
Hence, the horn is 100 times more intense compared to the weakest sound heard to the human ear.
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What is the place value of 1 of 574.8931.
i need help
please someone help me
Answer: 1/2 PI actually ez not gonna lie
Step-by-step explanation: We know that pi times radius squared times 45/360 equals 1/2 pi. PI*radius^2*0.125 = 1/2PI. Solve algebra to get r^2 = 4 or radius = 2. We need the diameter to find circumference. D = 2*r or D = 4. D * PI * 45/360 = answer. We get 4 * PI * 0.125 = 1/2 PI
9 1/3 divided by 2 4/5 show work please
Answer:
Step-by-step explanation:
Which of the following shows 9x2 - 19x + 10 factored completely?
A. (9x - 10)(x - 1)
B. (9x - 2)(x - 5)
C. (9x - 5)(x - 2)
D. (3x - 2)(3x - 5)
Corrine is purchasing beads to make a new necklace and bracelet set. The two pieces of jewelry each need silver and green beads. The necklace requires 25 silver beads and 15 green beads. The bracelet requires 10 silver beads and 5 green beads. Corrine paid $27.50 for the necklace beads and $10 for the bracelet beads. How much does each silver bead cost? How much does each green bead cost? Be sure to show your work and explain your answer.
Each silver bead costs $0.50, and each green bead costs $1.
Let's assume the cost of each silver bead is 's' dollars, and the cost of each green bead is 'g' dollars.
According to the given information, the necklace requires 25 silver beads and 15 green beads, and the bracelet requires 10 silver beads and 5 green beads.
The total cost of the necklace beads is $27.50, and the total cost of the bracelet beads is $10.
Using this information, we can set up the following system of equations:
25s + 15g = 27.50 (Equation 1)
10s + 5g = 10 (Equation 2)
We can solve this system of equations using any appropriate method, such as substitution or elimination.
Let's use the elimination method to solve the system:
Multiplying Equation 2 by 3, we get:
30s + 15g = 30 (Equation 3)
Subtracting Equation 3 from Equation 1:
25s + 15g - (30s + 15g) = 27.50 - 30
-5s = -2.50
s = 0.50
Now, substituting the value of s into Equation 2:
10(0.50) + 5g = 10
5 + 5g = 10
5g = 5
g = 1
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help me answer this please
Answer:
3,952 ft
Step-by-step explanation:
Use the sine function since you need to find the hypotenuse but know the opposite side of the angle, since sine is equal to opposite/hypotenuse.
sin8°=\(\frac{550}{c}\)
csin8°=550
c=550/sin8°
c= 3,952
Find parametric equations for an object moving clockwise along the ellipse (x²/9)+(y²/25)=1 beginning at (0,5) and requiring 3 seconds for a complete revolution.
x=
y=
The parametric equations for an object moving clockwise along the ellipse are x = 3 cos((2π/3) t) and y = 5 sin((2π/3) t)
How to find parametric equations for an object moving clockwise along the ellipse?
Given: the equation of an ellipse x²/9 + y²/25 = 1
Beginning at (0,5) and requiring 3 seconds
The parametric equations representing an ellipse x²/a² + y²/b² = 1 are
x = a cos(t) and y = b sin(t)
where t is the parameter with values between [0, 2π]
If t represents time. Then, if a lap around the ellipse is completed in T seconds we have,
x = a cos((2π/T) t)
y = b sin((2π/T) t)
where 2π/T is the period of the motion.
Combining these results, therefore, we have the parametric equations:
x = 3 cos((2π/3) t)
y = 5 sin((2π/3) t)
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If sin x=0.2, write down the values for sin (pi-x)
If the value of sin x = 0.2, then the values for sin(π - x) is 0.2.
Given that,
the value of sin x = 0.2
We have to find the value of sin(π - x).
We know the trigonometric rule that,
sin(π - x) = sin (x)
for any value of x.
So here whatever the value of x, the value of sin(π - x) is sin (x) itself.
So here sin x = 0.2.
So, by the rule,
sin(π - x) = sin (x) = 0.2
Hence the value is 0.2.
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Analyze the diagram below and complete the instructions that follow.
Find the unknown side length, x. Write your answer in simplest radical form.
A. 4√32
B. 22
C. 16√5
D. 16√13
Answer:
C. 16√5
Step-by-step explanation:
Use the Pythagorean Theorem.
\(48^2 = 32^2 + x^2\\2304 = 1024 + x^2\\x^2 = 1280\\x = \sqrt{1280}\\\)
\(\sqrt{1280}\) is also equal to \(16\sqrt{5}\).
There are eight boys in a pre-school class. Their mean height is 33 inches and their median height is 33 inches. The tallest boy whose height is 38 inches moves away and is replaced by a boy whose height is 39 inches. How does this affect the median
Using the median concept, it is found that it would remain the same, as only the tallest student is replaced, which does not influence the median.
What is the median?The median of a data-set is the value that separates the bottom 50% from the upper 50% of values.
Hence:
In a data-set of 8 values, the median is the mean between the 4th and the 5th elements.Only the tallest student is replaced, which is the 8th element, hence not affecting the median, which remains the same.You can learn more about the median concept at https://brainly.com/question/23923146
if you roll a number cube 20 times. which scenario is least likely?
a) you find the experimental probability of rolling a 1 or 2 to be 0.3.
b) you find the experimental probability of rolling a 3 or 4 to be 0.4.
c) you find the experimental probability of rolling a 5 or 6 to be 0.5.
d) you find the experimental probability of rolling a number divisible by 3 to be 0.35
I need help by figuring this out, this is geometry.
A culture of bacteria has an initial population of 9300 bacteria and doubles every 3
hours. Using the formula P = Po 25, where Pt is the population after thours, P
is the initial population, t is the time i hours and d is the doubling time, what is the
population of bacteria in the culture after 10 hours, to the nearest whole number
Answer:
The approximate population of bacteria in the culture after 10 hours is 93,738.
Step-by-step explanation:
General Concepts:Exponential Functions.Exponential Growth.Doubling Time Model.Logarithmic Form.BPEMDAS Order of Operations:
Brackets.Parenthesis.Exponents.Multiplication.Division.Addition.Subtraction.Definitions:We are given the following Exponential Growth Function (Doubling Time Model), \(\displaystyle\mathsf{P_{(t)}\:=\:P_0\cdot2^{(t/d)}}\) where:
\(\displaystyle\sf{P_t\:\:\rightarrow}\) The population of bacteria after “t ” number of hours. \(\displaystyle\sf{P_0 \:\:\rightarrow}\) The initial population of bacteria. \(\displaystyle{t \:\:\rightarrow}\) Time unit (in hours). \(\displaystyle{\textit d \:\:\rightarrow}\) Doubling time, which represents the amount of time it takes for the population of bacteria to grow exponentially to become twice its initial quantity. Solution:Step 1: Identify the given values.
\(\displaystyle\sf{P_0\:=}\) 9,300. t = 10 hours. d = 3.Step 2: Find value.
1. Substitute the values into the given exponential function.
\(\displaystyle\mathsf{P_{(t)} = P_0\cdot2^{(t/d)}}\)
\(\displaystyle\mathsf{\longrightarrow P_{(10)} = 9300\cdot2^{(10/3)}}\)
2. Evaluate using the BPEMDAS order of operations.
\(\displaystyle\mathsf{P_{(10)} = 9300\cdot2^{(10/3)}\quad \Longrightarrow BPEMDAS:\:(Parenthesis\:\:and\:\:Division).}\)
\(\displaystyle\sf P_{(10)} = 9300\cdot2^{(3.333333)}\quad\Longrightarrow BPEMDAS:\:(Exponent).}\)
\(\displaystyle\sf P_{(10)} = 9300\cdot(10.079368399)\quad \Longrightarrow BPEMDAS:(Multiplication).}\)
\(\boxed{\displaystyle\mathsf{P_{(10)} \approx 93,738.13\:\:\:or\:\:93,738}}\)
Hence, the population of bacteria in the culture after 10 hours is approximately 93,738.
Double-check:We can solve for the amount of time (t ) it takes for the population of bacteria to increase to 93,738.
1. Identify given:
\(\displaystyle\mathsf{P_{(t)} = 93,738 }\).\(\displaystyle\mathsf{P_0 = 9,300}\).d = 3.2. Substitute the values into the given exponential function.
\(\displaystyle\mathsf{P_{(t)} = P_0\cdot2^{(t/d)}}\)
\(\displaystyle\mathsf{\longrightarrow 93,378 = 9,300\cdot2^{(t/3)}}\)
3. Divide both sides by 9,300:
\(\displaystyle\mathsf{\longrightarrow \frac{93,378}{9,300} = \frac{9,300\cdot2^{(t/3)}}{9,300}}\)
\(\displaystyle\mathsf{\longrightarrow 10.07936840 = 2^{(t/3)}}\)
4. Transform the right-hand side of the equation into logarithmic form.
\(\boxed{\displaystyle\mathsf{\underbrace{ x = a^y}_{Exponential\:Form} \longrightarrow \underbrace{y = log_a x}_{Logarithmic\:Form}}}\)
\(\displaystyle\mathsf{\longrightarrow 10.07936840 = \bigg[\:\frac{t}{3}\:\bigg]log(2)}\)
5. Take the log of both sides of the equation (without rounding off any digits).
\(\displaystyle\mathsf{log(10.07936840) = \bigg[\:\frac{t}{3}\:\bigg]log(2)}\)
\(\displaystyle\mathsf{\longrightarrow 1.003433319 = \bigg[\:\frac{t}{3}\:\bigg]\cdot(0.301029996)}\)
6. Divide both sides by (0.301029996).
\(\displaystyle\mathsf{\frac{1.003433319}{0.301029996} = \frac{\bigg[\:\frac{t}{3}\:\bigg]\cdot(0.301029996) }{0.301029996}}\)
\(\displaystyle\mathsf{\longrightarrow 3.3333333 = \frac{t}{3}}\)
7. Multiply both sides of the equation by 3 to isolate "t."
\(\displaystyle\mathsf{(3)\cdot(3.3333333) = \bigg[\:\frac{t}{3}\:\bigg]\cdot(3)}\)
\(\boxed{\displaystyle\mathsf{t\approx10}}\)
Hence, it will take about 10 hours for the population of bacteria to increase to 93,378.
__________________________________
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At Bike Shop X it costs $2.75 per hour plus a $2.00 deposit to rent a bike. At Bike Shop Z it cost $1.75 per hour plus a $7.00 deposit to rent a bike. The total cost ,c, of renting a bike for n hours can be represented by a system of equations. Write and solve a system of equations to find how many hours you have to rent the bike for the cost to be the same.
Find the domain and range of the relation. Also determine whether the relation is a function.
{(6,3), (8,5), (-4,-4), (5,5)}
The domain is:
D: {-4, 5, 6, 8}
The range is:
R: {-4, 3, 5}
And yes, the relation is a function.
How to determine the domain and range?
For a relation that maps elements x into elements y (in the form (x, y)), we define the domain as the set of the inputs (values of x) and the range as the set of the outputs (values of y).
Here our relation is defined by: {(6,3), (8,5), (-4,-4), (5,5)}
The domain is the set of the first values of each pair, so we have:
D: {-4, 5, 6, 8}
The range is the set of the second values of each pair:
R: {-4, 3, 5}
Now, is this a function?
Yes, it is a function, because each input is mapped into only one output.
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