Answer:
I think C and E
Step-by-step explanation:
meg played at lace of 3.3333 tiles a minute so has to be over 25 tiles
The correct options are C and D.
Important information:
Meg laid 15 tiles in 50 minutes.Jessica worked for 85 minutes at a faster rate per tile than Meg.Rates:The rate per tile of Meg is:
[tex]\text{Rate}=\dfrac{\text{Time}}{\text{No. of tiles}}[/tex]
[tex]\text{Rate}=\dfrac{50}{15}[/tex]
[tex]\text{Rate}=3.333...[/tex]
Calculate the rates per tile for each option.
[tex]\frac{85}{20}=4.25[/tex]
[tex]\frac{85}{24}=3.54167...[/tex]
[tex]\frac{85}{28}=3.0357...[/tex]
[tex]\frac{3}{1}=3[/tex]
[tex]\frac{4}{1}=4[/tex]
From the above calculation is clear that the time spent per tile is less than Meg's rate in options C and D.
Therefore, the correct options are C and D.
Find out more about 'Rates' here:
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What percent is equal to 19 out of 32?
Answer:
59.375%
Step-by-step explanation:
Convert fraction (ratio) 19 / 32 Answer: 59.375%
(Now, can u help me??)
f(x) = x2 + 1 g(x) = 5 – x
(f + g)(x) = (f – g)(x) =
Answer:
Step-by-step explanation:
Hello,
[tex]\forall x \in \mathbb{R} \\\\(f+g)(x)=f(x)+g(x)=x^2+1+5-x=x^2-x+4 \\\\(f-g)(x)=f(x)-g(x)=x^2+1-5+x=x^2+x-4[/tex]
Thanks
Answer:
c for the first one and a for the second one
Step-by-step explanation:
just did it on edg
ITS EASY I PROMISE PLEASE NOW
Answer:
I'm pretty sure the answer is B
Step-by-step explanation:
Hope this helped :) Sorry if its wrong
Answer:
b
Step-by-step explanation:
I like to think of it as this:
If the circle is filled, it is [tex]\leq or \geq \\[/tex] (more)
If not, it's < or >
The arrow points in the direction the line is going.
In this graph, the line is going to the left. So is the symbol.
what does x equal in the equation f(x)=17
Units of Length
Write a conversion factor that you would use to convert
from feet to meters.
Customary System
Units
Metric System Units
new units of measure
original units of measure
1 inch
2.54 centimeters
numerator =
1 foot
0.3048 meters
denominator =
1 mile
1.61 kilometers
Intro
Done
Answer:
1 foot = 0.3048 meters
Step-by-step explanation:
1 foot = 12 inches
1 inch = 2.54 centimeters
1 foot = 12 * 2.54 = 30.48 centimeters
1 meter = 0.01 centimeters
1 foot = 0.3048 meters
Answer:
numerator =
✔ 0.3048 meters
denominator =
✔ 1 foot
Step-by-step explanation: I got it right
Find the slope of the roofof a home that rises 8 feet for every horizontal change of 24 feet
A.-3
B.-1/3
C.1/3
D.3
Answer:
(C).
Step-by-step explanation:
[tex]\frac{8}{24}[/tex] = [tex]\frac{1}{3}[/tex]
Answer:
1/3
Step-by-step explanation:
8/24
=1/3
Tell me if it's wrong
A market research firm supplies manufacturers with estimates of the retail sales of their products from samples of retail stores. Marketing managers are prone to look at the estimate and ignore sampling error. An SRS of 28
stores this year shows mean sales of 64 units of a small appliance, with a standard deviation of 13.8 units. During the same point in time last year, an SRS of 28 stores had mean sales of 48.958 units, with standard deviation 15.4 units. An increase from 48.958 to 64 is a rise of about 24%.
1. Construct a 99% confidence interval estimate of the difference μ1−μ2
μ1−μ2, where μ1 is the mean of this year's sales and μ2 is the mean of last year's sales.
(b) The margin of error is
2. At a 0.01 significance level, is there sufficient evidence to show that sales this year are different from last year?
Answer:
Confidence interval = (4.61972, 25.46428)
Margin of Error = 3.9078675
Step-by-step explanation:
Given that :
This year:
Mean (μ1) = 64
Standard deviation (s1) = 13.8
Sample size (n1) = 28
Last year:
Mean (μ2) = 48.958
Standard deviation (s2) = 15.4
Sample size (n2) = 28
99% confidence interval estimate of the difference μ1−μ2
α = 1 - 99% = 0.01
(μ1−μ2) ± t0.01,27 * (√s1²/n1 + s2²/n2)
t0.01, 27 = 2.770683 (t value calculator)
√s1²/n1 + s2²/n2 = √13.8^2/28 + 15.4^2/28 = 3.9078675
(64 - 48.958) ± 2.667(3.9078675)
15.042 ± 10.42228
(15.042 - 10.42228), (15.042 + 10.42228)
(4.61972, 25.46428)
The margin of error :
√(s1²/n1) + (s2²/n2)
√(13.8^2/28) + (15.4^2/28)
√(6.8014285 + 8.47)
√15.2714285
= 3.9078675
In which of the following situations would using the Pythagorean theorem be helpful?
a contractor wanting to determine how high to build a staircase
a contractor wanting to determine if a corner is square
an architect wanting to determine how high a roof should be
an architect wanting to determine a stair railing height
Answer:
A
Step-by-step explanation:
A linear function is written:
f(x) = 3/2x-4
What is the value of f(5)?
Answer:
[tex]f(5)=3.5[/tex]
Step-by-step explanation:
[tex]f(x)=\frac{3}{2}x-4\\f(5)=\frac{3}{2}(5)-4\\f(5)=7.5-4\\f(5)=3.5[/tex]
Hope this helped!! Have an amazing day :D
The required value of the linear function at x = 5 is 7 / 2.
Given that, a linear function f(x) = 3/2x-4 we have to determine the value of the function at x = 5 that is f(5).
The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
What are functions?Functions are the relationship between sets of values. e g y=f(x), for every value of x there is its exists in a set of y. x is the independent variable while Y is the dependent variable.
Here,
Liner function,
f(x) = 3/2x-4
Put x = 5 in above function,
f(5) = 3 * 5 / 2 - 4
f(5) = 15 / 2 - 4
f(5) = 15 - 8 / 2
f(5) = 7 / 2
Thus, the required value of the linear function at x = 5 is 7 / 2.
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What is the slope of the line that passes through (2,12) and (4,20)
A- -2
B-2
C- -4
D-4
Answer:
D. 4
Step-by-step explanation:
Use rise over run, (y2 - y1) / (x2 - x1)
Plug in the points:
(y2 - y1) / (x2 - x1)
(20 - 12) / (4 - 2)
8 / 2
= 4
So, the slope is 4.
A company charges 59.99 for cable TV and 49.99 per month for basic cable service How much will it cost for installation and one year of basic cable service
At a neighborhood cookout,
the ratio of children to adults
is 7:2. If there are 10 adults,
how many Total people are at
the cookout?
Answer:
45 people
Set up a proportion.
7/2 = x/10
cross multiply
We get 2x=70
x= 35
Children= 35
35 children + 10 adults= 45 people
9. The expression x(x-7)+4(x-7) is equivalent to each of the following except which choice?
(1) (x+4)(x-7)
(3) x2-28
(2) x2 – 3x – 28
(4) (x-7)(x+4)
Answer:
I the answer is number 3
x(x-7)+4(x-7)
x²-7x + 4x-28
=x²-3x-28
(x+4)(x-7)
x²-7x+4x-28
=x²-3x-28
(x-7)(x+4)
x²+4x-7x-28
=x²-3x-28
x2 – 3x – 28
the factored form is
=(x+4)(x-7)
if x is 12% of 180, then what is the value of 7x ?
Answer:
7uby-step explanation:
In a school egg drop challenge 136 of the eggs broke out of 200 total what percent of eggs survived the drop ?
To make this equation easier, we can just divide the data by 2, so that the exact number of eggs that survived, is the percentage that survived.
Explanation:
200 = 200 Total Eggs
136 = 136 Eggs That Broke
So, the ratio of eggs that broke to total eggs is:
136 / 200
So, subtract the number of eggs that broke to the total eggs, to find the amount that survived.
200 - 136 = 64
So now we know that, 64 eggs of 200 survived.
Which means, that 32% off the eggs had survived.
10) Christopher misses 4% of the free throws
he attempts in a season. How many total
free throws did he attempt if he missed 9?
Answer:
He attempted 225 free throws.
Step-by-step explanation:
9/0.04= 225
How many gallons of 40% antifreeze should be mixed with 10 gallons of 80% antifreeze to obtain a 65% antifreeze mixture?
Equation:
alcohol + alcohol = alcohol
0.40x + 0.85*10 = 0.65(x+10)
----
40x + 85*10 = 65x + 65*10
20*10 = 15x
-----
x = (2/3)20
---
x = 13 1/3 gallons (amt. of 40% solution needed)
On interval 0 ≤ x < 2π, where are the x-intercepts of y = cos(2x)?
The answer is choice D because we plug in something like x = pi/4 and it leads to
y = cos(2x)
y = cos(2*pi/4)
y = cos(pi/2)
y = 0
Use the unit circle to see why cos(pi/2) = 0.
Since we get y = 0 as a result, this shows x = pi/4 is one of the x intercepts.
You'll also get y = 0 if you plug in x = 3pi/4, x = 5pi/4, and x = 7pi/4. All of these values are on the interval [tex]0 \le x < 2\pi[/tex]
The solution of the equation y = cos(2x) will be π/4, 3π/2, 5π/4, and 7π/4. Then the correct option is D.
What is the solution to the equation?A solution to an equation is a number that can be plugged in for the variable to make a true number statement.
The equation is given below.
y = cos(2x)
The x-intercept of the equation in the interval 0 ≤ x < 2π will be given as,
y = 0
cos(2x) = 0
cos 2x = cos (n + 1) π/2
2x = (n + 1)π / 2
x = (n + 1)π / 4
x = π/4, 3π/2, 5π/4, 7π/4
The solution of the equation y = cos(2x) will be π/4, 3π/2, 5π/4, and 7π/4. Then the correct option is D.
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If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation. x + 4y = −9 2x + 5y = −6 (6 points) Question 2 options: 1) 2x + 5(4y − 9) = −6 2) 2x + 5(−4y − 9) = −6 3) 2(4y − 9) + 5y = −6 4) 2(−4y − 9) + 5y = −6
Answer:
2(−4y − 9) + 5y = −6
Step-by-step explanation:
Just completed the Test
Answer: 1) Solve for x in the first equation: x = -6y+29
2) –6x + 29
3) Simplify and solve for the variable that remains: y = 4
4) Back substitute y = 4 and solve: x=5
4)Therefore, the solution is (x, y) = 5,4
5) x + 6y = 29 (5,4)
2x - 4y = -6 (5,4)
Step-by-step explanation: just did the assignment
1/4(x-2)+4=12 help please
Answer:
X = 34
Step-by-step explanation:
15. Construct Arguments Maggie said that
she could add 8 to both sides of any
equation and the expressions on both sides
of the equation would still be equal. Do you
agree? Explain.
Answer:
I do not agree because if there is an equation like 7+8 the answers would not be equal. They can only be equal if you add 8 to each side of the same number. For example, 7+7 with 8 added on both sides would be equal. But Maggie says that it can be equal for any equation. Therefore, Maggie is wrong.
Step-by-step explanation:
1 ball of wool is 125m, how many balls are there with 604m??
Answer:
4.8 balls of wool
Step-by-step explanation:
604÷125=4.8
use first principle tan(3x-4)
Answer: m=3
Step-by-step explanation:
Solve each system by substitution.
11) 3x - y = 20
y=-2
Answer:
lol you stupid how do you not know
Step-by-step explanation:
lol
which graph represents the function? f(x) = ∛x+2
Answer:
graph shown in image below
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
Six comics are to perform on a single evening. Find the probability
Answer:
1 in 6
Step-by-step explanation:
Cherry is a realtor. She made the graph below to show the amount of taxes paid on the houses she has sold. Which of the following describes the rate at which the taxes changed?
It increased by $3 for every $2 increase in appraised value.
It increased by $200,000 for every $3,000 increase in appraised value.
It increased by $3,000 for every $200,000 increase in appraised value.
It increased by $3,000 for every $2,000 increase in appraised value.
There is a playground behind Jayden’s school where kids go outside for recess. The playground is 85 feet wide and 236 feet long. Jayden is curious if the playground has an area of more or less than 20,000 square feet. Does it? Show and explain how you know.
Answer:
Yes
Step-by-step explanation:
A = L x W
A = 236 x 85
A = 20,060
20,060 is more than 20,000 so yes
Find the Surface Area:
Of the picture below
6cm
3 cm
3 cm
2 cm
Answer:
72 cm^2 OR 72 sq cm.
Step-by-step explanation:
6 x 5 = 30
10 x 3 = 30
2 x 6 = 12
30 + 30 + 12 = 72
Sorry, i don't exactly know how to explain it without drawing it. But i assure you it is correct.
Nicole earned a total of $6 by selling 2 cups of lemonade. After selling a total of 24 cups of lemonade, how much money will Nicole have made in all
She would have made $72
Each cup of lemonade is $3, so 3x24 is 72. Or you could just do 6x12, it's all the same.
