I need Answer Immediately!!!!!!!
Answer:
Step-by-step explanation:
slope intercept form
y=mx+c
Which statement best describes this graph?
Answer: The answer to this problem is the second choice “As the x-value increases by 1, the y-value decreases by 1/2, the x-intercept is -2.
Have a nice day!
What number should go into the blank so that the two expressions are equivalent to each other? (Use only the digits 0 - 9 to write the number.) 10 + 5x = x + x + x + __ - 4 + x + x
Given:
The equation is:
[tex]10+5x=x+x+x+\_\_\_-4+x+x[/tex]
To find:
The number for the blank so that the two expressions are equivalent to each other.
Solution:
Let n be the required number for the blank. Then,
[tex]10+5x=x+x+x+n-4+x+x[/tex]
On combining like terms, we get
[tex]10+5x=(x+x+x+x+x)+n-4[/tex]
[tex]10+5x=5x+n-4[/tex]
Subtracting 5x from both sides, we get
[tex]10=n-4[/tex]
Adding 4 on both sides, we get
[tex]10+4=n[/tex]
[tex]14=n[/tex]
Therefore, the required number of the blank is 14.
Can someone pleaseeee help and if you’re correct i’ll give brainliest
please help tysm!!!!!!!!!!!!!!
I'm pretty sure It'd be 74° <3
please helppppppppppp0
Answer:
a had 8 b had 10 total=180
Step-by-step explanation:
it's weird. I never really liked word problems but think through it. if each of them had to be the same amount of points, then what does bothe 10 AND 8 fit into?
80. simple.
so that means there were 8 true false questions in section a and 10 multiple choice in b and there was 160 points total because 80 +80 = 160
PLS HELP HURRY BEFORE MY TEACHER COMES IN
Answer:
it is the hilighted one the one besides it and below it
Step-by-step explanation:
PLEASE HELP ME I BEG I WILL GIVE BRAINLIEST
Researchers fed mice a specific amount of Aldrin, a poisonous pesticide, and studied their nervous systems to find out why Aldrin causes convulsions. The absolute refractory period, time required for nerves to recover after a stimulus, was measured and varies Normally. The measurements, in milliseconds, for five mice were 2.1, 2.3, 2.3, 2.4, and 2.5.
Part A: Find the mean refractory period and the standard error of the mean. (2 points)
Part B: Calculate a 95% confidence interval for the mean absolute refractory period for all mice when subjected to the same treatment. (4 points)
Part C: Suppose the mean absolute refractory period for unpoisoned mice is known to be 2.1 milliseconds. Aldrin poisoning should slow nerve recovery and therefore increase this period. Do the data give good evidence to support this theory? What can you conclude from a hypothesis test? Justify your response with statistical reasoning. (4 points)
Answer:
Mean = (2.2 + 2.4 + 2.5 + 2.5 + 2.6 + 2.7)/6 = 2.48
Standard deviation = √(summation(x - mean)²/n
n = 6
Summation(x - mean)² = (2.2 - 2.48)^2 + (2.4 - 2.48)^2 + (2.5 - 2.48)^2 + (2.5 - 2.48)^2 + (2.6 - 2.48)^2 + (2.7 - 2.48)^2 = 0.1484
Standard deviation = √(0.1484/6
s = 0.16
Standard error = s/√n = 0.16/√6 = 0.065
Part B
Confidence interval is written as sample mean ± margin of error
Margin of error = z × s/√n
Since sample size is small and population standard deviation is unknown, z for 98% confidence level would be the t score from the student t distribution table. Degree of freedom = n - 1 = 6 - 1 = 5
Therefore, z = 3.365
Margin of error = 3.365 × 0.16/√6 = 0.22
Confidence interval is 2.48 ± 0.22
Part C
We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean
For the null hypothesis,
H0: µ = 2.3
For the alternative hypothesis,
H1: µ > 2.3
This is a right tailed test
Since the number of samples is small and no population standard deviation is given, the distribution is a student's t.
Since n = 6
Degrees of freedom, df = n - 1 = 6 - 1 = 5
t = (x - µ)/(s/√n)
Where
x = sample mean = 2.48
µ = population mean = 2.3
s = samples standard deviation = 0.16
t = (2.48 - 2.3)/(0.16/√6) = 2.76
We would determine the p value using the t test calculator. It becomes
p = 0.02
Assuming significance level, alpha = 0.05.
Since alpha, 0.05 > than the p value, 0.02, then we would reject the null hypothesis. Therefore, At a 5% level of significance, the sample data showed significant evidence that the mean absolute refractory period for all mice when subjected to the same treatment increased.
Step-by-step explanation:
PLEASE ANSWER QUICKLY
Answer:3600
\
Step-by-step explanation:
A rectangle has a base of 8 yards and a height of 12.1 yards. What is the area?
5. The sides of a right triangle have lengths of 7 m, 9 m, and 10 m. The hypotenuse
has a length of:
a) 7 m
b) 9 m
c) 10 m
d) 24 m
Can someone help me with this math problem?
Answer:
[tex]x=7,\\m\angle LKN = 84^{\circ}[/tex]
Step-by-step explanation:
1. For KM to be the angle bisector of angle LKN, it must be bisect LKN into two equal angles. Therefore, we have the following equation:
[tex]9x-21=6x,\\-21=-3x,\\x=\boxed{7}[/tex]
2. Substituting [tex]x=7[/tex]:
[tex]\angle LKN=9x-21+6x=9(7)-21+6(7)=63-21+42=\boxed{84^{\circ}}[/tex]
A rectangle is placed around a semicircle as shown below. The length of the rectangle is 14 m . Find the area of the shaded region. Use the value 3.14 for , and do not round your answer. Be sure to include the correct unit in your answer.
Answer:
21.07 m²
Step-by-step explanation:
Please find the complete question in the attached image
Area of shaded region = area of rectangle - area of semicircle
Area of semicircle = [tex]\frac{1}{2}[/tex]πr²
π = 3.14
r = radius = 14/2 = 7m
the diameter of the semicircle is 14m , thus the radius would be half of the diameter
(1/2) x 3.14 x 7² = 76.93 m^
Area of a rectangle = length x width
width = radius of semicircle = 7
14 x 7 = 98 m²
Area of shaded region = 98 m² - 76.93 m^ = 21.07 m²
Which month had the biggest difference between the high and low temperatures?A.January
B.April
C.October
D.November
Please help me with this one.
Answer:
Step-by-step explanation:
Jackie you should know that the supplemental angles always add to 180° :)
That's like angles 1 & 2 or 55° & 1 . both are supplemental and add to 180°
Knowing this should make answering this pretty easy. :)
180 = ∠1 + 55
125 = ∠1
∠3 =∠1
∠2 = 55°
since line g is parallel to f , we know all the angles in the same places of line f are identical... got it?
Which fraction
is equivalent to 6/2
1/3
Answer:
[tex]\frac{3}{1}[/tex]
Step-by-step explanation:
[tex]\frac{3}{1}[/tex] is equivalent to [tex]\frac{6}{2}[/tex] because 3 x 2 = 1 x 6 = 6. 93 is equivalent to [tex]\frac{6}{2}[/tex] because 9 x 2 = 3 x 6 = 18. 124 is equivalent to [tex]\frac{6}{2}[/tex] because 12 x 2 = 4 x 6 = 24.
Diogo and his 4 friends want to share the cost of a meal equally. They order
Menu
3 large pizzas and 5 small drinks. If they leave a tip of $7.50, how much does Small pizza $6.00
each person pay?
Large pizza $10.00
Small drink $1.50
Large drink
$3.00
Each person pays $
(Round to the nearest cont as needed.)
Answer:
45 rand
Step-by-step explanation:
3 large pizzas is 10 ×3=R30
5 small drinks is 1.50×5=R7.50
tip of R7.50
add all
30+7.50+7.50
=45
of the pie.
If a person has eaten 2 out of 4 equal pieces of pie, then they have eaten
A. 1/2
B. 1/4
C. 1/3
D. 2/3
where dose this go on the number line
Answer:
3.14
Step-by-step explanation:
[tex]\pi[/tex] or commonly known as Pi is equal to 3.14 so it will fit in between 3 and 4 but closer to 3.
what is 98.627
-8.823
Answer:
89.804
Step-by-step explanation:
√96a^ 3 b ^4
simplify square roots
Answer:
[tex]4ab^2\sqrt{6a}[/tex]
Step-by-step explanation:
if your equation is [tex]\sqrt{96a^3b^4}[/tex] then my answer is correct! :)
Mark me as brainliest!!
Six people share 3/8 pound of peanuts equally. What fraction of a pound of peanuts does each person receive? Enter your answer in simplest form.
answer=1/4
explanation ; 6divided by 3/8=0.25 which is equal to 25/100 or 25 divides 25 once and divides 100 4 times giving 1/4
please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!
Answer:
71
Step-by-step explanation:
Recall the trig ratios
Sine = Opposite over Hypotenuse
Cosine = Adjacent over Hypotenuse
Tangent = Opposite over Adjacent
We are given ∠T's opposite side length and the adjacent side length.
When dealing with opposite and adjacent we use trig ratio Tangent.
( remember tan = opposite over adjacent )
[tex]tan(x)=\frac{52}{18}[/tex]
* multiply each side by the inverse of tan ( [tex]tan^-^1[/tex] )
[tex](tan)^-^1tan(x)=x\\(tan)^-^1*\frac{52}{18} =70.906508\\x = 70.906508[/tex]
* round to the nearest degree *
We get that x = 71
Bella wants to write two equations to model the streets on this map. She can use y = x – 4 to describe Platte Way. Find one absolute value equation to describe Marteen Rd and Smith St.
Answer:
y={x+2}-3
Step-by-step explanation:
Answer:
i don't know
Step-by-step explanation:
Write the first ten terms of a sequence whose first term is -10 and whose common diference is -2.
HELP PLEASE!!!
Assume a class has 25 students.
a) If 80% of the class passed the test, how many students passed?
students
b) If 7 students got A’s on the test, what percent of students got A’s?
%
Answer:
A) 20
B) 28%
Step-by-step explanation:
A) In order to find percentages you need to make them in to decimals. 80% as a decimal is .8, if you multiply 25 by the decimal .8, you get 20.
B) To find the percentage all you do is divide, 7/25, this gives you the decimal .28, this as a percentage is 28%.
Please help I dont get it :(
Answer:the answer is Knowing that 9^2+12^2= 13^2, , draw the 9 cm side and the 12 cm side with a right angle between them. The 13 cm side will fit to form a right triangle. ( C.) boooooooooooooom
Sasha counts unit squares to find the area of the rectangle. What is another way she could find the area?
Answer:
- Take the length and width, and multiply
Step-by-step explanation:
Two solutions of different concentrations of acid are mixed creating 40 mL of a solution that is 32% acid. One-quarter o...
Answer:
See explanation below
Step-by-step explanation:
Question is incomplete. Here's the whole question:
"Two solutions of different concentrations of acid are mixed creating 40 ml of a solution that is 32% acid. one-quarter of the solution is made up of a 20% acid solution. the remaining three-quarters is made up of a solution of unknown concentration, c. equation can be used to determine c, the unknown concentration?
a) 30c + 10(0.2) = 40(0.32)
b) (c) + (0.2) = 40(0.32)
c) (c)( (0.2)) = 40(0.32)
d) 30(c)(10(0.2)) = 40(0.32)"
With this, we can now solve the question.
We have a solution that was made mixing2 different solutions of acid. In this case, we can assume the following:
Solution 1 = 40 mL 32% acid
Solution 2 = 1/4 solution 1, 20% acid
Solution 3 = 3/4 solution 1, c% acid.
Thus we can say:
Solution 1 = Solution 2 + Solution 3 (1)
Now, 1/4 of the volume of solution 1, means that we use 10 mL of a 20%acid, and the remaining 30 mL is the unknown acid.
With this, we can discart option b) and c) because these option are not considering the volume of solution 3 used. Option d is not doing any sum, only multiplications, so, this is not the option to use. We can easily say it's option a, but let's prove it.
In general terms, concentrations and volume are related, and if we have two solutions, the information of these two solutions must be conserved in the resulting solution. In other words:
M₁V₁ = M₂V₂
According to this, the concentration of the unknown acid would be:
30c + 0.2*10 = 40(0.32)
30c + 2 = 12.8
30c = 10.8
c = 0.36
Which means that the concentration of the acid is 36%
Hope this helps
Answer:
A. a) 30c + 10(0.2) = 40(0.32) !
Step-by-step explanation:
EDG
(2/5)^-2(-3)^4
What is the equivalent?
Answer:
-8100
Step-by-step explanation:
(2/5)^-2(-3)^4
Given data
and second term
The first term= (2/5)^-2 and
Second term=(-3)^4
Simplify the first term
(2/5)^-2= 2^-2/ 5^-2= 1/2^2 * 1/5^2
=1/4/ 1/25
=1/4*25/1
=100
Simplify the second term
=(-3)^4
= -81
Hence, 100*81
=-8100