Answer:
Marie should rent the trombone
Step-by-step explanation:
If Marie rents it for 12 months it'll be 12x34= $408.
If Marie buys a trombone it'll cost her 495 which is more expensive.
Determine whether the situation is an example of an experiment or an observational
study. Explain.
A researcher asks people how many hours they exercise per week and examines
whether this affects the amount of sleep they get.
a)
This is an observational study. The researcher is applying a treatment
(exercise) instead of simply gathering data.
This is an experiment. The researcher is applying a treatment (exercise)
instead of simply gathering data.
b)
c)
This is an observational study. The researcher gathers data instead of
applying a treatment.
d)
This is an experiment. The researcher gathers data instead of applying a
treatment.
This is an observational study. The researcher gathers data instead of applying a treatment. The correct option is C.
What is an observational study?An observational study is used in fields such as epidemiology, social sciences, psychology, and statistics to draw conclusions from a sample to a population where the independent variable is not under the researcher's control due to ethical concerns or logistical constraints.
The given situation is a researcher asks people how many hours they exercise per week and examines whether this affects the amount of sleep they get.
The above research is an observational study. The researcher gathers data instead of applying a treatment.
To know more about an observational study follow
https://brainly.com/question/14393640
#SPJ2
A rectangle has the dimensions x + 1 centimeters and 2x + 6 centimeters. Which expression represents the area, in square centimeters, of the rectangle?
A. 2x2 + 8x + 6
B. 3x2 + 7
C. 2x2 + 7x + 6
D. x2 + 8x + 6
Answer:
A. 2x2+8x+6
Step-by-step explanation:
two x squared plus 8x plus 6.
For each situation, explain whether you think the relationship is proportional or not.
The weight of a stack of standard 8.5x11 copier paper vs. number of sheets of paper.
Answer:
Proportional
Step-by-step explanation:
This is proportional because the weight of the stack of paper directly corresponds to the number of sheets of paper. The amount of paper affects the weight. It's just like saying that adding one extra person in an elevator will make the weight of the elevator more.
Help plz plz!!!!!!!!!!!!!!!!!
Answer:
I don't see anything!!!!
What’s this answer?
A. -5/2
B.-2/5
C.2/5
D.5/2
Answer:
B. -2/5
Step-by-step explanation:
Hope this helped, have an AMAZING day!!
plz halp i need to get this right.
Answer:
C
Step-by-step explanation:
Principal of $3500.00 was invested at a simple interest rate of 1.50% per annum. It
earned $157.50 in simple interest. How many years was it invested for?
10x + 5y = 40
Slope-intercept form:
Answer:
y = -2x + 8
Step-by-Step Explanation:
10x + 5y = 40
5y = -10x + 40
y = -2x + 8
Answer:
[tex]y=-2x+8[/tex]
Step-by-step explanation:
Slope-Intercept form is:
[tex]y=mx+b[/tex]
_
[tex]10x+5y=40[/tex]
Start by subtracting [tex]10x[/tex] from both sides of the equation:
[tex]5y=-10x+40[/tex]
Divide both sides of the equation by the coefficient of [tex]y[/tex], which is [tex]5[/tex]:
[tex]y=-2x+8[/tex]
If answered I will give you brainliest.
Erica and Mario tested a toy car to see how fast it would travel. They recorded their results in the table below. What is the average speed of the toy car? Choose the best answer.
A 0.12 m/s
B 0.6 m/s
C 1.2 m/s
D 1.6 m/s
√30
A. √30
B. 4√3
Which one?
Answer:
5.47723
Step-by-step explanation:
munozkatia07 This is for you to get 6/5 brainliests
Answer:
What do you need help with?
Step-by-step explanation:
There are 35 red beads on the bracelet. The number of green beads on the bracelet is 42. Kaleb says that means the ratio of the number of red beads to the number of green beads is 5: 7. Is Kaleb correct? Explain why or why not. (Use complete sentences!)
Answer:
No
Step-by-step explanation:
Ratios are the same as percentages or fractions. In this case there are 35 red beads for every 42 green beads on the bracelet. This means the ratio would be [tex]\frac{35}{42}[/tex] , which when put divided is 0.833 or 83.3%. Kaleb is stating that the ratio is 5:7 which would basically be [tex]\frac{5}{7}[/tex] which when divided is 0.71 or 71%. Therefore, since these percentages are different we can go ahead and say that Kaleb is not correct.
⚠️⚠️ What’s the SLOPE and Y intercept (b) ⚠️⚠️
PLEASE HELP,
Answer:
y = 1x+300
Step-by-step explanation:
Thats what i think is but th eiline dosent texactlyhit each corner
A stadium has 46, 000 seats. Seats sell for $28 in Section A, $24 in Section Band $20 in Section C. The number of seats in Section A equals the total number of seats in Sections B and Suppose the stadium takes in $1,162,400 from each sold-out event. How many seats does each section hold?
Answer:
good question
Step-by-step explanation:
What is the area of the rectangle with the dimensions of 2x+6 and x-2
Answer:
2x^2+2x−12 or (2x+6)*(x-2)
Step-by-step explanation:
Area: (2x+6)*(x-2)
now, we simplify.
(2x+6)*(x-2)=(2x+6)(x+(−2))
=(2x)(x)+(2x)(−2)+(6)(x)+(6)(−2)
=2x^2−4x+6x−12
=2x^2+2x−12
Kelli wants to sew trim around the sleeves and hem of a dance costume. She needs a piece of trim that is 8 1/8 inches long for the sleeves and a piece that is 40 5/8 inches long for the hem. If the package contains 5 feet of trim, how much trim will she have left after making the costume.
Answer:
0.9375 feet of trim
Step-by-step explanation:
Step 1
We find the total number of inches used
We are told : She needs a piece of trim that is 8 1/8 inches long for the sleeves and a piece that is 40 5/8 inches long for the hem.
Hence, the total = (8 1/8 + 40 5/8)inches = 48 3/4
= 48.75 inches
Step 2
We convert to feet
1 inch = 0.0833333 feet
48.75 inches = x
Cross Multiply = 48.75 × 0.00833333 feet
= 4.0625 feet
Hence, she would use 4.0625 feet of ribbon
If the package contains 5 feet of trim, how much trim will she have left after making the costume.
This is calculated as:
5 feet - 4.0625 feet
= 0.9375 feet of trim
A bakery has 72 half gallons of milk. It takes 123 cups of milk to make a cake. Note that 1 cup = 18 half gallon = 0.125 half gallon. How many cakes can the bakery make?
Answer:
Total production= 4.68 cakes = 4 cakes
Step-by-step explanation:
Giving the following information:
A bakery has 72 half gallons of milk.
It takes 123 cups of milk to make a cake.
1 cup = 0.125 half gallon
First, we need to calculate the number of half gallons for each cake:
Half gallons per cake= 123*0.125= 15.375 half gallons
Now, for 72 half gallons:
Total production= 72/15.375
Total production= 4.68 cakes = 4 cakes
A group of preschoolers has 17 boys and 22 girls. What is the ratio of girls to boys?
Answer: the ratio of girls to boys is 22 to 17
The total cost for 10 pairs of headphones, including shipping was $125. The shipping charge was $15. What was the cost of each pair of headphones? Write and an equation and find the solution.
Answer:
y=15+12.5xStep-by-step explanation:
given data
chipping charge= $15
cost of 10 pair= $125
le the cost of 1 pair be x
given that 10 pairs cost $125
then 1 would cost x
cross multiply we have
10x=$125
x= 125/10
x=$12.5
therefore the equation for the solution is
let y be the total cost
y=15+12.5x
The driving time varies inversely with the speed of the car if a certisn trip takes 40 min utes when you travel 50 miles per hour how many minutes would it take if u travel 40 miles per hour
Answer:
The value is [tex]t_2 = 50 \ minutes[/tex]
Step-by-step explanation:
From the question we are told that
The driving time varies inversely with the speed of the car
The amount of time a trip at a velocity of [tex]v_1 = 50 \ mph[/tex] takes is [tex]t_1 = 40[/tex]minutes
Let
v represent the velocity
while t represent the time
So
[tex]t \ \ \alpha \ \ \frac{1}{v}[/tex]
=> [tex]t \ \ = k \ \ \frac{1}{v}[/tex]
=> [tex]k = vt[/tex]
=> [tex]v_1 * t_1 = v_2 * t_2[/tex]
From the question we are given [tex]v_2 = 40 \ mph[/tex] and we are told to find [tex]t_2[/tex]
So
[tex]t_2 = \frac{v_1 * t_1}{v_2}[/tex]
=> [tex]t_2 = \frac{ 50 * 40}{40}[/tex]
=> [tex]t_2 = 50 \ minutes[/tex]
which expression can you use to find the volume, in cubic feet, of this rectangular prism
Answer:
Its 6 x 5 x 3
Step-by-step explanation:
did it on i-ready hope this helps you!
Choose the point-slope form of the equation below that represents the line that passes through the points (-6,4) and (2,0)
hey help me out plz
Solve 2 ≤ 2x + 4 < 10 for x.
–1 ≤ x < 3
1 < x < 3
–1 < x < 3
1 ≤ x < 3
Answer:
–1 ≤ x < 3
Boom.
How many solutions does the following equation have?
74y - 8–78y = -4y - 8
Answer:
infinity
Step-by-step explanation:
i needs help :( pwz help ill mwark brainliest..
Answer: Ill help you:)
But with what?
what are congruent triangles?
Answer:
same side and angle of 2 triangles
Step-by-step explanation:
The total amount y (in dollars) in your savings account after buying x video games is represented by y=90-10x. You have $40 in your account after buying video games. How many video games did you buy?
Charmaine must choose a number between 61 and 107 that is a multiple of 3, 6 and 8. Write all the numbers that she could choose. If there is more than one number, separate them with commas.
Answer: 72, and 96
Step-by-step explanation:
Multiples of 3 between 61 and 107 are= 63,66,69,72,75,78,81,84,87,90,93,96,99,102,105
Multiples of 6 between 61 and 107 are:
= 66,72,78,84,90,96,102
Multiples of 8 between 61 and 107 are:
= 64,72,80,88,96,104
The common multiple to 3, 6 and 8 from 61 to 107:
= 72, and 96
A computer randomly puts a point inside the rectangle. What is the probability
that the point does not land in triangle T?
Answer:
87.5%
Step-by-step explanation:
The area of the entire rectangle is 8 by 6,
8x6=48 so the area is 48 units^2.
The area of the triangle is A=1/2bh
A=1/2(2)(6)
A=1(6)
A=6 units^2
6/48=0.125
0.125=12.5%
You need to find the percent it will not land in the triangle, so subtract 12.5 from 100.
100-12.5=87.5
There is an 87.5% chance it will not land in the triangle
Answer:
Just took test its 7/8
Step-by-step explanation:
If you wrote 0.0009763 as a single digit times a power of ten, would the exponent be positive or negative? A. 00:00 The exponent would be negative because the original number is greater than one. B. 00:00 The exponent would be positive because the original number is greater than one. C. 00:00 The exponent would be negative because the original number is less than one. D. 00:00 The exponent would be positive because the original number is less than one.
Answer:
The exponent would be negative because the original number is less than one.
Step-by-step explanation:
The given number is 0.0009763. We can write it as a single digit times a power of ten.
There are 3 zeroes after decimal and then 9 comes. As the original number is less than. It means we can write it as follows :
[tex]0.0009763=9.76\times 10^{-4}[/tex]
The exponent is negative here. The correct option is (c) "The exponent would be negative because the original number is less than one"
