Answer:
D; 2 miles
Step-by-step explanation:
Please Mark my answer Brainliest!
Pleaseeeee helpppplsksxmkdks
Answer:
b
Step-by-step explanation:
Answer:
reflection!!
Step-by-step explanation:
(CO 4) Supplier claims that they are 95% confident that their products will be in the interval of 20.45 to 21.05. You take samples and find that the 95% confidence interval of what they are sending is 20.48 to 21.02. What conclusion can be made
Answer:
The supplier is less accurate than they have claimed
Step-by-step explanation:
Given that:
95% confidence interval of supplier's claim :
(20.45, 21.05)
Mean = (20.45 + 21.05) /2 = 41.5 / 2 = 20.75
Error margin = (upper bound - mean) = 21.05 - 20.75 = 0.30
95% confidence interval of your sample :
(20.48, 21.02)
Mean : (20.48 + 21.02) /2 = 41.05 / 2 = 20.75
Error margin = (upper bound - mean) = 21.02 - 20.75 = 0.27
0.3 > 0.27
From the calculations made, the mean are the same, but the error margin of supplier is higher, thus it could be concluded that the supplier is less accurate than they have claimed
the angles of a triangle are in the ratio 2:3:4 find the size of each angle
Answer:
40:60:80
Step-by-step explanation:
2x+3x+4x=180 (sum of ang. In tri. Is 180)
X=20
2x is 40
3x is 60
4x is 80
40 plus 60 plus 80 is 180.
Please help me with this question
Use the original price and the markdown to find the retail price. Original price: $80; Markdown: 18%
Answer:
$27
Step-by-step explanation:
Select all that apply.
Which of the following ratios are equlvalent to 6:8?
24:36
9:12
12 to 16
16 to 24 36/40 15/20
Answer:
multiply 6:8 by 2
12:16
Jerome solves the inequality y–2 ⩽ 9 in one step, writing y ⩽ 11 as the solution. What property best justifies the step he used to solve the inequality?
A. multiplication or division property of inequality
B. addition or subtraction property of inequality
C. distributive property
Please help please please
If x=1/2 and y=3/2, find the values of i) xy÷(x+y) ii) x+y ÷ x-y
Answer:
i) 3/8
ii) -2
Step-by-step explanation:
i) 1/2*3/2/(1/2+3/2)
3/4/2
3/4*1/2
3/8.
ii) 1/2+3/2 / 1/3-3/2
2/-1
-2.
Hope this helps :)
The sum of a number and eight is equal to 14 what is the number
Answer:
the number is 6
Step-by-step explanation:
14-8=6
good luck!
pentagon PQRST ~ pentagon XYZVW. find the value of b. will give brainlist
Answer:
Step-by-step explanation:
(4a - 3)/(3b + 1) = 39/(a + 1) You are not going to get a numerical answer for this. Cross multiply
(4a - 3)(a + 1) = 39(3b + 1)
4a^2 + a - 3 = 117b + 39
4a^2 + a - 42 = 117b
b = [tex]\frac{a^2 +a - 42}{117}[/tex]
Answer:
b = 3
Step-by-step explanation:
I think that the relations are the following
[tex]\frac{QP}{XY}=\frac{RS}{VZ}=\frac{PT}{XW}\\\\\frac{39}{13}=\frac{4a-3}{a+1}=\frac{5a+6b}{5b+1}\\\\3=\frac{4a+3}{a-1}=\frac{5a+6b}{5b+1}[/tex]
so we first solve for a and then for b
[tex]3=\frac{4a-3}{a+1}\\\\3(a+1)=4a-3\\\\3a+3=4a-3\\\\4a-3a=3+3\\\\a=6[/tex]
and now for b
[tex]3=\frac{5a+6b}{5b+1}\\\\3(5b+1)=5a+6b\\\\15b+3=5a+6b\\\\15b=5a+6b-3\\\\15b-6b=5a-3\\\\9b=5a-3\\\\b=\frac{5a-3}{9}\\\\b=\frac{5(6)-3}{9}\\\\b=\frac{30-3}{9}\\\\b=\frac{27}{9}\\\\b=3[/tex]
Graph this equation:
x - 2y = 6
Answer:
The image below shows the equation x - 2y = 6 being graphed.
Hope this helps! :)
I need help with 5 problems! Please actually help and don't just reply for points!
This question applies to ALL the photos: Is there enough information to prove that the triangles are congruent? If yes, provide the correct Triangle Congruence Postulate or Theorem and a congruence statement. If no, justify your answer.
Answer:
There is enough evidence to prove they are congruent. AAS would be what's used in this case.
Step-by-step explanation:
(< = angle)
<B = <Z, <A = <Y, line AC and line XY are equal.
Edit: So it appears that each of the photos are congruent. They have enough labels on them to tell you that their last unidentified angle would have to be congruent as well, meaning that each picture is congruent.
A worker uses 750 inches of steel wire to make 300 springs of the same size. At this rate how many inches of steel wire are needed to make 1 spring?
2.5 inches steel wire
We can use an equation to find the answer. 750/300 = 2.5
Answer:
2.5 inches of steel wire are needed to make one spring.
Step-by-step explanation:
In order to answer this, we can set up a proportion (setting two fractions equal to each other) to solve for how many inches of steel wire are needed to make one spring.
We are given a ratio: 750 inches of steel wire are required to make 300 springs. Therefore, this is represented as:
[tex]\bullet \ \ \ \text{750 inches of steel wire : 300 springs}[/tex]
This can be rewritten in fraction form:
[tex]\displaystyle \bullet \ \ \ \frac{\text{750 inches of steel wire}}{\text{300 springs}}[/tex]
Therefore, we have our first proportion.
We want to make one spring, so we need to find how much steel is required to make one spring. Therefore, for our second fraction, the inches of steel wire is unknown. We can define this as x.
[tex]\bullet \ \ \ \text{x inches of steel wire}[/tex]
Finally, our ratio can be written in the same manner as the previous ratio:
[tex]\bullet \ \ \ \text{x inches of steel wire : 1 spring}[/tex]
This can be rewritten in fraction form:
[tex]\displaystyle \bullet \ \ \ \frac{\text{x inches of steel wire}}{\text{1 spring}}[/tex]
Now, we need to set up our proportion. We do this by setting our two ratios equal to each other.
[tex]\displaystyle \bullet \ \ \ \frac{\text{750 inches of steel wire}}{\text{300 springs}} = \frac{\text{x inches of steel wire}}{\text{1 spring}}[/tex]
To solve a proportion, we need to cross multiply. We can flip our fractions and solve for the reciprocal since there is not really a way to represent cross-multiplication.
[tex]\displaystyle \bullet \ \ \ \frac{\text{750 inches of steel wire}}{\text{300 springs}} = \frac{\text{1 spring}}{\text{x inches of steel}}[/tex]
First, we can drop our labels/units.
[tex]\displaystyle \bullet \ \ \ \frac{750}{300} = \frac{1}{\text{x}}[/tex]
Then, we can multiply across.
[tex]\displaystyle \bullet \ \ \ 750 = 300x[/tex]
Finally, we can solve for x.
[tex]\displaystyle 750 = 300x\\\\\frac{750}{300}=\frac{300x}{300}\\\\2.5 = x\\\\x = 2.5[/tex]
Therefore, to make one spring, exactly 2.5 inches of steel wire are needed.
one strand of lights for a Christmas tree 250 light bulbs. If 20% of the light bulbs are green how many light bulbs on the strand of light are green?
Answer:
20% of 250 is 50
HELP A BROTHER OUT!! IVE BEEN STUCK ON THESE 2 QUESTIONS
-7+(63/9) Evaluate the Following Expression
Answer:
0
Step-by-step explanation:
[tex]-7+(\frac{63}{9})=-7+7=0[/tex]
#2: List the numbers shown below in order from least to greatest. USE A COMMA
TO SEPARATE. *
-12, 23, 18, 12, -19, -25,8
HELP ASAP
Answer:
-25 < -19 < -12 < 8 < 12 < 18 < 23
Step-by-step explanation:
Sorry if im wrong
The length s of this circular segment is 1.0 m and its radius r is 2.0 m. The area of the shaded triangle is most nearly:
Answer:
[tex]A=0.95m^2[/tex]
Step-by-step explanation:
From the question we are told that
Length of circular segment[tex]l =1.0m[/tex]
Radius [tex]r =2.0m[/tex]
Generally considering points A's angle
[tex]\angle A = \frac{1}{2} radian[/tex]
Mathematically converting [tex]\angle[/tex] to degree
[tex]\angle A= 1/2*100/\pi[/tex]
[tex]\angle A=20.6 \%[/tex]
Mathematically solving for the triangles Area
[tex]A=\frac{1}{2} * AB* AC*sinA[/tex]
[tex]A=\frac{1}{2} * 2* 2*sin(28.64)[/tex]
[tex]A=0.95m^2[/tex]
An automobile manufacturer claims that its car has a 37.9 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car since it is believed that the car has an incorrect manufacturer's MPG rating. After testing 140 cars, they found a mean MPG of 38.2. Assume the standard deviation is known to be 1.2. A level of significance of 0.01 will be used. Find the value of the test statistic. Round your answer to 2 decimal places
Answer:
2.958
Step-by-step explanation:
Sample mean (x) = 38.2 MPG
Population mean (μ) = 37.9 MPG
Sample size (n) = 140
Standard deviation (σ) = 1.2
The test statistic (Tstat) can be obtained thus :
(x - μ) / σ/sqrt(n)
Tstat = (38.2 - 37.9) / 1.2/sqrt(140)
Tstat = 0.3 / 0.1014185
Tstat = 2.9580401
Test statistic = 2.958
5/6 divided by 1 and 1/2?
Answer:
5/9
Step-by-step explanation:
(5/6)/1 1/2
5/9
Merry Christmas
Ram gained 25 percent by selling a second hand motorcycle for Rs. 45000. At
price did Ram buy that motorcycle?
Answer:
Ram bought that motorcycle for Rs. 36000
Step-by-step explanation:
Given that:
Amount gained = 25%
Selling price of motorcycle = Rs. 45000
As 100% will be the original price, then 25% will be added into it.
125% will be the new percentage.
Let,
x be the original price of motorcycle.
125% of x = 45000
[tex]\frac{125}{100}x=45000[/tex]
1.25x=45000
Dividing both sides by 1.25
[tex]\frac{1.25x}{1.25}=\frac{45000}{1.25}\\[/tex]
x=36000
Hence,
Ram bought that motorcycle for Rs. 36000
Estimate the quotient. Round your answer to the nearest whole number.
39.8 ÷ 4 ≈ ??
Answer:
10
Step-by-step explanation:
39.8/4=9.95, rounds to 10
need helpwith this math
Answer: -0.6, -1/4 (-0.25), -0.15
Step-by-step explanation: the farther away from 0, going left, the smaller the number.
Evaluate x – 3y if x = –4 and y = –6.
22
14
–14
–22
Answer:
-22
Step-by-step explanation:
x-3y
(-4)-3(-6)
(-4)-(-18)
(-22)
Please help me
Lisa has only nickels and dime in her money box. She knows that she has less than $15 in the box. Let x represent the number of nickels in the box and y represent the number of dimes in the box. Which of the following statements best describes the steps to graph the solution to the inequality in x and y?
Answer:
Draw a dashed line to represent the graph of 5x + 10y = 1500 and shade the portion below the line for positive values of x and y.
Step-by-step explanation:
This is the answer I can confirm that this is true rather than,"WhAt TyPe Of MaThEmAtIcS iS tHis?"
6 times the difference of n and 9 is 54
Answer:
18
Step-by-step explanation:
hope this helps someone
Answer:
ok
Step-by-step explanation:
Answer:
D and it does help
Step-by-step explanation:
brainliest please
What is the value of (2/3) -(5/6) ÷ ¾ =
Answer:
-4/9 or -0.4
Step-by-step explanation:
10 pts Question 4 A horizontal line passing though the origin that includes both positive and negative numbers is called Y-Axis O X-Axis Point Ordered Pair 4 Previous Next >
then A If it’s a horizontal line passing through