PLLSS HELP ME ty :)))
Solve the system of linear equations using
substitution. Y=x-3
Y=8x-31
Answer:
x=4 y=1 or (4,1)
Step-by-step explanation:
In a study of facial behavior, people in a control group are timed for eye contact in a 5- minute period. Their times are normally distributed with a mean of 184 seconds and a standard deviation of 55 seconds. For a randomly selected person from the control group, find the probability that the eye contact time is greater than 230 seconds
Answer:
0.20148
Step-by-step explanation:
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score = 230
μ is the population mean = 184
σ is the population standard deviation = 55
z = 230 - 184/55
z = 0.83636
P-value from Z-Table:
P(x<230) = 0.79852
P(x>230) = 1 - P(x<230) = 0.20148
Therefore, the probability that the eye contact time is greater than 230 seconds is 0.20148
PLS HELP ME! Joye has a circular garden with a diameter of 24 feet. If she uses 2 cups of fertilizer for every 10 square feet, how much fertilizer will Joye use for her garden? Use 3.14 for pi
Answer:
90.5 cups
Step-by-step explanation:
Step one:
Given data
diameter= 24ft
radius= 12 ft
area= πr^2
Area= 3.142*12^2
Area= 3.142*144
Area= 452.448 ft^2
Hence if
2 cups of fertilizer for every 10 square feet
x cups will do for 452.448 ft^2
cross multiply we have
x= 452.448 *2/10
x=904.896/10
x=90.5 cups
x= -1/5; f(x) = (25/2)x + (-91/2) =
Answer:
Write the problem as a mathematical expression.
X=−1/5; f(x)=(25/2)x+(−91/2)
Replace the variable x with x=−1/5 in the expression.
f(−1/5)=(25/2)(−1/5)−91/2
Simplify the result.
−48
Step-by-step explanation:
Find the value of x. Round to
the nearest tenth.
Х
15°
300
X = ?
Answer:
80.4
Step-by-step explanation:
Use the tan formula
The value of X is approximately 80.38 units.
Here, we have,
To find the value of X, we can use trigonometric functions.
In this case, we'll use the tangent function, which relates the angle and the sides of a right triangle.
The tangent of an angle is defined as the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle.
In this scenario, we have the angle between the hypotenuse and the base as 15°, and the base of the triangle is given as 300 units.
Using the tangent function, we can set up the equation:
tan(15°) = X / 300
Now, let's solve for X:
X = 300 * tan(15°)
Using a calculator, we find:
X ≈ 80.384
Rounding to the nearest tenth, the value of X is approximately 80.38 units.
To learn more trigonometry click:
brainly.com/question/26719838
#SPJ6
please solve the logarithmic equation and show your work. log3(2x-5)=2
what is the value or |-12.7| and |11.1/4| ?
Answer:
12.7, because the absolute value gets rid of the negative integer, and shows it true value which is positive 12.7.
Step-by-step explanation: Have a Happy Thursday :)
~Can ~ you ~ please ~ help ~ me ~ out?~
Also please don't make fun of how I write my questions- ;w;
If you do that's okay, I'm not the boss of you ^^
Answer: c
Step-by-step explanation:
300 students were served about their favorite Subject the results are shown on the table below language arts 15 math 24 psi and 33 social studies 21 elective seven how many students prefer science then math
Which of the following is the correct equation for the line
that crosses the x-axis at (3,0) and the y-axis at (0, 6)?
Answer:
-4,5
Step-by-step explanation:
1) Give an example of a rational number AND an irrational number.
What is the difference between them?
2) What is the decimal equivalent of your two examples?
3) Can every repeating decimal be written as a rational number? Explain why or why
not.
Answer:
Step-by-step explanation:
A rational number is one that can be expressed as a fraction. Pi cannot be. If I tell you that the 2000th digit of pi is an 8 (which it probably isn't) and I ask you to tell me the 2001 value of pi, you have no better odds that 1/10 of getting it right.
A rational number can always be reduced to a fraction. 20 1/2 can be expressed as a fraction. It is 20.5
Pi is irrational. I don't know the value of pi beyond what a calculator can tell me. 3.14159265 The next digit is a 4. I know this only because that is what the calculator tells me.
Repeating decimals call always be represented as a fraction. For ex
x = 0.123123123123123
1000x = 123.123123123123
x = .123123123123123 Subtract
999x = 123
This comes about because in both cases what is after the decimal is the same.
x = 123/999 = 41/333
Help me pleaseee haha
Answer:
C = 5x + 100
Step-by-step explanation:
Its C because...
The 100 is the y-intercept, it's not going to change, it will remain constant
The 5x represents the amount of money PER day, which is 5, so as each day increases (x) so will the amount of money
Hope this helped!
Answer:
The answer is 5x + 100.
Step-by-step explanation:
the starting fee is 100 and it costs 5 per day so 5x + 100.
Please give brainliest
3/5+1/3= ...............................................................................................................
Answer:
Step-by-step explanation:
you add two fractions:
3/5+1/3=
find the common denominator = it is 15 (3*5)
9/15+5/15=14/15
Find the measure of the numbered angle
Answer:
1 = 50°, 2 = 130°, 3 = 50°, 4 = 130°, 5 = 40°, 6 = 140°, 7 = 90°, 8 = 140°
Step-by-step explanation:
The sum of the angles of a triangle is 180°. A flat angle measures 180° as well.
Angle 1: 180 - 90 - 40 = 50°
Angle 2: 180 - 50 = 130°
Angle 3: 180 - 130 = 50°
Angle 4: 180 - 50 = 130°
Angle 5: 180 - 90 - 50 = 40°
Angle 6: 180 - 40 = 140°
Angle 7: 180 - 90 = 90°
Angle 8: 180 - 40 = 140°
It's a little complicated, but I hope this helps!
what is 1/5x +8 < -4
Answer:
The answer is x< -60
please let me know if I am incorrect.
Explanation:Solve for x by simplifying both sides of the inequality, then isolating the variable.
Hadley was going out with her friends for dinner. The equation c = x + 0.07x + 0.18x gives the total cost c of her meal, where x is the cost before tax and tip. The restaurant charges 7% sales tax and she plans to leave an 18% tip. She knew that she can only spend $18. What is the maximum amount Hadley can spend before tax and tip?
Answer:
$14.4
Step-by-step
c = x + 0.07x + 0.18x
18 = x + 0.07x + 0.18x
18 = 1.25x (simplify)
14.4 = x (divide both sides by 1.25)
Will I fail this year, let me know what you think.
Answer:
nahhhhhhh u will passsss
You can walk 3/4 of a mile in 1/6 of an hour (10 minutes). How far can you walk in an hour?
Answer:
4 and 1/2 miles (or 9/2 miles)
Step-by-step explanation:
I would set this up as a proportion
3/4 x
10 60
Cross multiply
60 x 3/4 = 45
Divide
45/10 = 4.5
4.5 = 4 and 1/2 miles
I need help please!
Answer/Step-by-step explanation:
Area of trapezium = ½*(AD + BC)*AB
Area = 42 cm²
AD = (x + 8) cm
BC = (x + 5) cm
AB = x cm
Plug in the values into the equation
42 = ½((x + 8) + (x + 5))*x
42 = ½((x + 8 + x + 5)*x
42 = ½(2x + 13)*x
Multiply both sides by 2
42*2 = (2x + 13)*x
84 = 2x² + 13x
2x² + 13x = 84
Subtract both sides by 84
2x² + 13x - 84 = 0
I need help ASAP! JUST GIVE ME THE ANSWER!
How much of the circle is shaded? Write your answer as a fraction in simplest form.
4/7 and 1/3
Answer:12/7
Step-by-step explanation:
4/7÷1/3=12/7
OKK almost done pls tell me if you can!!!!
Step-by-step explanation:
(3*4+1) / 4. * (2*5+3) / 5
= 13/ 4 * 13 /5
= 169/20
Answer:
(8 9/20)(x)
Step-by-step explanation:
Select two ratios that are equivalent to 2:92:92, colon, 9.
Answer:
The only options equivalent to 2:9 are B and C. A ratio is a comparison between two or more numbers
Step-by-step explanation:
Answer:
B and C
Step-by-step explanation:
anybody know this one
need help asap if you can help that would be awsome
Answer:
12
Step-by-step explanation:
the diagram is shown to have 3 equal angles (equilateral triangle) therefore all sides are the same length.
X = 12
Aden gets paid daily for the work she does and she does not work on Sundays. Last year which was n ot a leap year had 52 Sundays. She got Dhs 354003 as her annual salary last year. If the March of last year had 5 Sundays, how much did she earn in that month?
Answer: Dhs 29312.4
Step-by-step explanation:
For a leap year, we should note that there are 366 days. Since there were 52 Sundays, the number of days worked by Aden will be:
= 366 - 52
= 314 days
Since she got Dhs 354003 as her annual salary last year, the amount received per day will be:
= 354003 / 314
= Dhs 1127.4
The amount earned in March will be:
= (31 - 5) × 1127.4
= 26 × 1127.4
= Dhs 29312.4
Lynn and three friends estimated to find 29.11 ÷ 35. Their estimates are shown in the table below.
Whose estimate is best?
Answer:
I don't see any table please be sure to include it.
Step-by-step explanation:
Answer:
Lynn
Step-by-step explanation:
29.11 divided by 35 is 82 remainder 31. Lynn has the closest answer.
A poodle puppy weighs 1.5 kg when it is born and gains 0.04 kg each day.
A golden retriever puppy weighs 1.2 kg when it is born and gains 0.1 kg each day.
How many days will it take for the two puppies to weigh the same amount?
Answer:
down below
Step-by-step explanation:
you need to find the greatest common multiple
sorry, i am really tired rn and can't solve it
but maybe one of the dogs becomes anorexic and then they will never weigh the same?
Answer:
333333324.442
Step-by-step explanation:
A poodle puppy weighs 1.5 kg when it is born and gains 0.04 kg each day.
A golden retriever puppy weighs 1.2 kg when it is born and gains 0.1 kg each day.
How many days will it take for the two puppies to weigh the same amount
Evaluate the expression 36.6 – 24 x 22 ÷ 3
Answer:
-139.4
Step-by-step explanation:
36.6 - 528 ÷ 3 = 36.6 - 176
= -139.4
lets try this again can someone help
Answer:
Step-by-step explanation:
First expand into [tex]\left(x^2-9\right)\left(3x+2\right)[/tex]. Then expand again to[tex]3x^3+2x^2-27x-18[/tex]