Racer's average driving speed
for a 4-hour trip was 45 miles per
hour. During the first three hours he
drove 40 miles per hour. What was his
average speed for the last hour of his
trip?
A 70 miles per hour
B. 60 miles per hour
C. 50 miles per hour
D. 65 miles per hour
Answer:
the answer is C.
Step-by-step explanation:
(50+40)/2=45
Answer:
so to average 45mph for 4 hours, he had to drive 4x45 miles total
4x45= 180miles
now we know he drove 120 miles (3x40) in the first 3 hours.
so he drove 180-120= 60 miles in the last hour.
60mph
if anyone could help me would be much appreciated, i provided the question in a picture!!
Part A:
8t + 5h = 220
t + 5h = 112
Part B:
T-shirt cost $13.50
Hat cost $22.40
Plzz give the answers fast
Answer:
1. a. The decimal form of 1/3 is 0.33333333333...
b. To find the decimal form of (0.333333333333...)², we need to convert it to fraction. The fraction of 0.333333333333... is 1/3
(1/3)² is 1/9.
if we convert 1/9 back to decimal we get 0.11111111111111....
A person places $9680 in an investment account earning an annual rate of 5.3%, compounded continuously. Using the formula V = P e r t V=Pe rt , where V is the value of the account in t years, P is the principal initially invested, e is the base of a natural logarithm, and r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 18 years.
Answer:
[tex]\displaystyle V \approx 25129.99[/tex]
General Formulas and Concepts:
Math
Euler's number e ≈ 2.718Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Continuously Compounded Interest Rate Formula: [tex]\displaystyle V = Pe^{rt}[/tex]
V is value of accountP is principle initially investede is base of lnr is rate of interestt is time in yearsStep-by-step explanation:
Step 1: Define
P = $9680
r = 5.3% = 0.053
t = 18 years
Step 2: Solve
Substitute in variables [Continuously Compounded Interest Rate]: [tex]\displaystyle V = 9680e^{0.053(18)}[/tex]Multiply exponents: [tex]\displaystyle V = 9680e^{0.954}[/tex]Evaluate exponents: [tex]\displaystyle V = 9680(2.59607)[/tex]Multiply: [tex]\displaystyle V = 25129.988684793[/tex]Round: [tex]\displaystyle V \approx 25129.99[/tex]What is the first step you would take to solve the equation shown?
4 + 4n = -12
1. Add 4
2. Subtract 4
3. Multiply by 4
4. Divide by 4
A teacher wants to determine how to sit 30 students in a classroom.
What simulation can be used to determine where the students sit?
A. A coin is used and assigned for every two students.
B. A six-sided number cube and every 6 students are assigned to a side.
C. A random number generator where each student is assigned a number.
D. A standard deck of cards is used and students are assigned to the cards.
Helppppp
Answer:
c is the best one to choose because it makes the most since
Which function is graphed?
Answer:
B
Step-by-step explanation:
You can use Desmos to help with questions like these :)
A sales manager collected data on annual sales for new customer accounts and the number of years of experience for a sample of 10 salespersons. In the Microsoft Excel Online file below you will find a sample of data on years of experience of the salesperson and annual sales. Conduct a regression analysis to explore the relationship between these two variables and then answer the following questions.
Open spreadsheet
Compute b1 and b0 (to 1 decimal).
b1 =
b0 =
Complete the estimated regression equation (to 1 decimal).
= + x
According to this model, what is the change in annual sales ($1000s) for every year of experience (to 1 decimal)?
Compute the coefficient of determination (to 3 decimals). Note: report r2 between 0 and 1.
r2 =
What percentage of the variation in annual sales ($1000s) can be explained by the years of experience of the salesperson (to 1 decimal)?
%
A new salesperson joins the team with 8 years of experience. What is the estimated annual sales ($1000s) for the new salesperson (to the nearest whole number)?
1 1 85
2 3 97
3 3 95
4 5 97
5 7 105
6 8 106
7 10 122
8 10 120
9 12 113
10 12 134
Answer:
Kindly check explanation
Step-by-step explanation:
Given :
Years of experience (X) :
1
3
3
5
7
8
10
10
12
12
Annual sales (Y) :
85
97
95
97
105
106
122
120
113
134
The estimated regression equation obtained is :
y = b0 + b1x
b0 = 82.82967
b1 = 3.46061
ŷ = 3.46061X + 82.82967
The change in annual sales for every year of experience is given by the slope value, b1 = 3.46061 = 3.5 (1 decimal place)
The Coefficient of determination R² = 0.8477 = 0.848 ( 3 decimal place).
The Coefficient of determination gives the proportion of explained variance.
About 84.8% percent variation in annual sales can be explained by years of experience of the sales person.
Using the regression equation :
ŷ = 3.46061X + 82.82967
Years of experience, x = 8
ŷ = 3.46061(8) + 82.82967 = 110.514
111 = (to the nearest whole number)
How many seconds are in m minutes?
60 + m seconds
60 m seconds
60/m
Answer: 60 times m seconds
Note:
The answer choices say m seconds, not minutes.
Is it b Brainly???Math question
Answer:
C is correct
Step-by-step explanation:
if y varies inversely with the square of x, and y=6 when x=4, find y when x=0.1
Answer:
9600
Step-by-step explanation:
y varies inversely with the square of x
y=k/(x^2)
for some non-zero constant k
y=6 when x=4
6=k/(4^2)
k=96
y=96/(x^2)
x=0.1
y=96/(0.1^2)
y=9600
Which of the following shows how to write 8,240 pennies as
dollars?
Answer:
$ 82.40
Step-by-step explanation:
you divide
100 pennies in a dollar
8240/100=82.40
-Find the area of Mr. Gonzalez's classroom garden
Answer:
Step-by-step explanation:
We can find the area by breaking this into two rectangles one 3 by 7 and the other 1 by 2. The area of any rectangle is xy where x and y are its dimensions
A=3(7)+1(2)
A=21+2
A=23 yd^2
The area of Mr. Gonzalez's classroom garden is 23 square yd.
What is area?"The space occupied by two dimensional object."
In the rectangle ABDC,
AB = 3yd and BD = 5yd
Formula to find the area of classroom garden
Area of rectangle = length x width
Area of rectangle ABDC = AB x BD
= [tex]3[/tex] ×[tex]5[/tex]
[tex]= 15[/tex]square yd.
In the rectangle EFGC,
EF = 4yd and FG = 2yd
Area of rectangle EFGC = EF x GC
= [tex]4[/tex] × [tex]2[/tex]
= [tex]8[/tex] square yd.
Area of Mr. Gonzalez's classroom garden
= Area of rectangle ABDC + Area of rectangle EFGC
= [tex]15[/tex] + [tex]8[/tex]
= 23 square yd.
Hence, the area of Mr. Gonzalez's classroom garden is 23 square yd.
Learn more about area here
https://brainly.com/question/11952845
#SPJ2
NEED HELP!!!
Find the value of X and Y
Answer:
x = 2
y = 152°
Step-by-step explanation:
✔️9x + 10 = 15x - 2 (corresponding angles theorem)
Collect like terms
9x - 15x = -10 - 2
-6x = -12
Divide both sides by -6
x = -12/-6
x = 2
✔️y + (15x - 2) = 180° (same-side interior angle theorem)
Plug in the value of x
y + (15*2 - 2) = 180
y + 28 = 180
y = 180 - 28
y = 152
Which of the following is not a valid probability?
A. 1.3
B. 0.4
C. 1
D. O
Answer:
B and A
Step-by-step explanation:
because probabilities are between 0 being not possible and 1 being possible
A. Is not a valid probabily because it is a number great than 1.
What is the answer for 3(x+5)=5x+7
Answer:
x = 4
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightDistributive Property
Equality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityAlgebra I
Terms/CoefficientsStep-by-step explanation:
Step 1: Define
3(x + 5) = 5x + 7
Step 2: Solve for x
[Distributive Property] Distribute 3: 3x + 15 = 5x + 7[Subtraction Property of Equality] Subtract 3x on both sides: 15 = 2x + 7[Subtraction Property of Equality] Subtract 7 on both sides: 8 = 2x[Division Property of Equality] Divide 2 on both sides: 4 = xRewrite: x = 4Answer:
x=4 is your answer
Step-by-step explanation:
3(x+5)=5x+7
3x+15=5x+7
15-7=5x-3x
2x=8
x=8/2=4
A person places $1150 in an investment account earning an annual rate of 5.3%, compounded continuously. Using the formula V = Pe^{rt}V=Pe rt , where V is the value of the account in t years, P is the principal initially invested, e is the base of a natural logarithm, and r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 10 years.
The amount of money that would be in the investment account with continous compounding would be $12,125.94.
What is the future value of the investment account?The formula for calculating future value when there is continuous compounding is :
A x e^r x N
Where:
A= amount e = 2.7182818 N = number of years r = interest rate1150 x (e^0.053) x 10 = $12,125.94
To learn more about continuous compounding, please check: https://brainly.com/question/26476328
Plzz help me I am timed!!
Answer:
B : 10 cm^3
Step-by-step explanation:
L x W x H = V
4cm x 2cm x 1 1/4 (1.25) = 10cm^3
1 1/4 = 4 x 1 = 4 + 1 = 5/4 = 1.25
Hope this helps!
I am pretty sure this is right.
Price of one CD after February discount $
Price of one CD after March markdown $
After both discounts were taken separately
60% off the regular price?
Explain why the application of two separ
discount of 60%
Answer:
vssguudgebseisiehjejsieheusssushsbddjdhfbbfjfjfnfnfnfnfnnfjfngjfjfjfjfjfjfjfjf
Isaiah decided to build a fence around his property. He lives on a rectangular lot 70 feet long and 50 feet wide. How many feet of fence does he need to buy?
Answer:250 feet
Step-by-step explanation: a rectangle has four sides, now you have two numbers, 70 and 50. so you do 4÷2 = 2 now take 2 a multiply it 70(140) now do it with 50(100) now add em (250) it is how i do it
Someone please help it’s for home work
You bought $2000 worth of stock in 2012. The value of the stock has been depreciating by 12%
each year.
What was the stock worth in 2017? Round your answer to the nearest cent. *
Answer:
$2000.00 X 12% =$240.00
$240.00 X 5 = $1200.00
Answer $1200.00
Step-by-step explanation:
Please please help
Think of your own statistical question and write it below:
Answer:
this will help u because my teacher just telled us about a statistical question
Step-by-step explanation:
The purpose of this task is to help students learn to distinguish between statistical questions and questions that are not statistical. A statistical question is one that can be answered by collecting data and where there will be variability in that data. This is different from a question that anticipates a deterministic answer.
hope that help
Ben hires some buses to take 768 people to a football match. Each bus can take 56 people.
Ben hires the least number of buses needed to take all 768 people. Then 19 of the people decide not to go to the football match. Does Ben still need all the buses he has hired? You must show how you get your answer.
Answer:
yes, he still needs all the buses he hired
Step-by-step explanation:
768 people/56 people per bus = 13.71, so 14 buses
768 - 19 = 749 people going
749people/56 people per bus = 13.37, so still need 14 buses
can some pals help me
Answer:
1/8th of a foot
Step-by-step explanation:
All you have to do is divide the 5 feet by how ever many sections there are in this case it's 8.
5 / 8 = 0.625 = 1/8
In a class of the students in a class are girls.
There are 28 boys.
What fraction of the class are boys?
How many students are in the class?
Answer:
[tex]Boys = 1 /4[/tex]
[tex]Total =112[/tex]
Step-by-step explanation:
Given
[tex]Girls= 3/4[/tex] --- missing information
[tex]Boys = 28[/tex]
Solving (a): The fraction that are boys
We have:
[tex]Girls= 3/4[/tex]
This implies that
[tex]Boys = 1 - Girls[/tex]
[tex]Boys = 1 - 3/4[/tex]
[tex]Boys = 1 /4[/tex]
Solving (b): Students in the class
If 1/4 are boys, then:
[tex]Boys = \frac{1}{4} * Total[/tex]
We also have that: [tex]Boys = 28[/tex]
So:
[tex]28= \frac{1}{4} * Total[/tex]
[tex]28 * 4 = Total[/tex]
[tex]112= Total[/tex]
[tex]Total =112[/tex]
three years back , a father was 24 years older than his son .at present,the father is five times as old as the son.how old will the son be three years from now?
Answer:
The son is 5 I think
Step-by-step explanation:
24+3=27
27 divided by 5 = 5.4
round 5.4 to 5 since it is under .5
and you get 5
PLEASE HEELP IM GIVING BRAINLIEST TO THE FIRST CORRECT ANSWER!!!
What is an equation of the line that passes through the point (3.-1) and has a slope of 2?
y = 2x + 5
y = 2x -1
y = 2x-4
y= 2x -7
Answer:
y = 2x - 1
Step-by-step explanation:
-1 is the y-intersect of the slope
Which graph shows that y varies directly as x?
Answer:
Step-by-step explanation:
What is the slope of the line?
Answer:
y= 3/7x− 3/26
Step-by-step explanation:
I'm sorry about their answers... anyways, the answer is 3/3.