Answer:
-1.25
Step-by-step explanation:
A disc has a diameter of 23 cm the inner hole in the disc has a radius of 2 cm find the circumference for both the inner hole and the entire disc round to the nearest whole centimeter
Answer:
The diameter of the entire disc is 72.22 cm, that is, 72 cm rounded to the nearest whole centimeter. In turn, the diameter of the inner circle is 12.56 cm, that is, 13 cm rounded to the nearest whole centimeter.
Step-by-step explanation:
Given that a disc has a diameter of 23 cm and the inner hole in the disc has a radius of 2 cm, to find the circumference for both the inner hole and the entire disc the following calculations must be performed, knowing that the circumference of a Circle is calculated by multiplying 3.14 by the diameter, which in turn measures twice the radius:
23 x 3.14 = X
72.22 = X
Therefore, the diameter of the entire disc is 72.22 cm, that is, 72 cm rounded to the nearest whole centimeter.
3.14 x (2 x 2) = X
3.14 x 4 = X
12.56 = X
In turn, the diameter of the inner circle is 12.56 cm, that is, 13 cm rounded to the nearest whole centimeter.
[tex]s = 2\pi(r + h)[/tex]
find r
4 The data below lists the number of pages in each book Harry read
last summer.
225, 157, 144, 312,
281, 276, 166
What is the median of the data?
?
A
168
223
B
С
225
312
D
Answer: 225 is the answer
Step-by-step explanation:
Teresa Alice drove 383.5 miles in 6.5 hours. What is her average rate of speed?
Answer:
59
Step-by-step explanation:
383.5/6.5=59
please help
The graphs below have the same shape. What is the equation of the blue graph?
A. g(x) = (x - 2)2 + 1
B. g(x),= (x - 2)2 -1
C. g(x) = (x + 2)2 - 1
D. g(x) = (x + 2)2 + 1
Answer:
A
Step-by-step explanation:
Graph the parabola using the direction, vertex, focus, and axis of symmetry.
Vertex: (2,1)(2,1)
Focus: (2,54)(2,54)
Axis of Symmetry: x=2
Hope it helped :)
help me please I dont know this
Answer:
answer: 384
Step-by-step explanation:
Hello! cubes are very simple! since there all the same measure and 6 faces all we have to do is 8 × 8 = 64 sense we know 1 face is 64 we just have to multiply by 6 cause there is 6 faces so
64 × 6 = 384 Hope this helps you!
Sheila is cutting a sector out of a circle with area 42 cm2. She wants the sector to have a central angle to measure between 25° and 35°, 5π36 radians and 7π36 radians respectively. Which of the following are possible areas for the sector? Select the two correct answers
2.5 cm2
3.8 cm2
3.5 cm2
2.7 cm2
4.6 cm2
irs 2.7jsjsjsjjsjssjjw I have no idea what is I to on to with
Circle A has center of (4, 5), and a radius of 3 and circle B has a center of (1, 7), and a radius of 9. What steps will help show that circle A is similar to circle B? (6 points) Translate circle A using the rule (x + 3, y - 2). Сь Dilate circle A by a scale factor of 3. Oc Rotate/circle A 90° about the center, D Reflect circle A over the x-axis,
Answer:
Dilate Circle A by a scale factor of 3
Step-by-step explanation:
Circle A has a radius of 3, Circle B has a radius of 9. By dilating Circle a by a scale factor of 3, it will make it the same size as Circle B, showing that the two circles are similar.
Rotating and reflecting does nothing because both circles are in the same quadrant and rotating a circle does nothing to the placement.
Translating the circle (x+3, y-2) does not put it in the same place as circle B.
Question 5 of 10
Use the function below to find F(-4).
F(x) = 2x
O A. -16
B. -8
C.
1CO
1
O D.
Answer:
B. -8
Step-by-step explanation:
F(x) = 2x
F(-4) = 2(-4) = -8
The local branch of the Internal Revenue Service spent an average of 21 minutes helping each of 10 people prepare their tax returns. The standard deviation was 5.6 minutes. A volunteer tax preparer spent an average of 27 minutes helping 14 people prepare their taxes. The standard deviation was 4.3 minutes. At α = 0.02, is there a difference in the average time spent by the two services? Find the 98% confidence interval for the two means.
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
Answer:
The confidence Interval is [- 0.7053 10.4521]
a: The hypotheses are
H0: μ1=μ2 against the claim Ha :μ1≠μ2
b. The critical value for t∝/2 for 17 d.f t > 2.508 and t < -2.111
c. t= -2.8422
d. The calculated value of t= -2.8422 is less than t < -2.11 the critical value therefore we reject H0 and conclude there is a difference between the two means.
Step-by-step explanation:
When the standard deviations are not the same then the confidence intervals for mean differences are calculated as
(x1`-x2`)- t∝/2 √s1²/n1 + s2²/n2 < u1-u2 < (x1`-x2`)+ t∝/2 √s1²/n1 + s2²/n2
x1`= 21 x2`= 27
n1= 10 n2= 14
s1= 5.6 s2= 4.3
The degrees of freedom is calculated using
υ = [s₁²/n1 + s₂²/n2]²/ (s₁²/n1 )²/ n1-1 + (s₂²/n2)²/n2-1
= 17
The t∝/2 for 17 d.f = 2.11
Putting the values
(x1`-x2`)- t∝/2 √s1²/n1 + s2²/n2 < u1-u2 < (x1`-x2`)+ t∝/2 √s1²/n1 + s2²/n2
(21-27) - 2.11√5.6²/10+ 4.3²/14 < u1-u2 <(21-27) +2.11√5.6²/10+4.3²/14
6- 2.11*2.111 < u1-u2 < ( 6 ) +2.11*2.111
6- 4.4521 < u1-u2 < ( 6 ) +5.294
- 1.5479 < u1-u2 < 10.4521
The confidence Interval is [- 0.7053 10.4521]
a: The hypotheses are
H0: μ1=μ2 against the claim Ha :μ1≠μ2
The claim is that there is a difference in the average time spent by the two services
b. The critical value for t∝/2 for 17 d.f t > 2.508 and t < -2.111
The degrees of freedom is calculated using
υ = [s₁²/n1 + s₂²/n2]²/ (s₁²/n1 )²/ n1-1 + (s₂²/n2)²/n2-1
= 17
c. The test statistic is
t= (x1`-x2`) /√s1²/n1 + s2²/n2
t= (21-27) /√5.6²/10+ 4.3²/14
t= -6/2.111
t= -2.8422
d. The calculated value of t= -2.8422 is less than t < -2.11 the critical value therefore we reject H0 and conclude there is a difference between the two means.
HELP PLEASEEEEEEEEEEEEEEE
Answer:
Step-by-step explanation:
12²+15² is 369. square root of 369 is 3[tex]\s\sqrt{41[/tex] or 19.2
What is the degree of the equation?
What is the Leading Coefficient of the equation ?
Solve using the Quadratic Equation.
5X^2 – 3X – 8=0
Answer:
1 (give brainliest plss)
Step-by-step explanation:
Step-1 : Multiply the coefficient of the first term by the constant 5 • -8 = -40
Step-2 : Find two factors of -40 whose sum equals the coefficient of the middle term, which is -3 .
-40 + 1 = -39
-20 + 2 = -18
-10 + 4 = -6
-8 + 5 = -3 That's it
Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -8 and 5
5x2 - 8x + 5x - 8
Step-4 : Add up the first 2 terms, pulling out like factors :
x • (5x-8)
Add up the last 2 terms, pulling out common factors :
1 • (5x-8)
Step-5 : Add up the four terms of step 4 :
(x+1) • (5x-8)
Which is the desired factorization
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the concept of Quadratic Equations.
Degree of a equation represents the highest power of the varible in the equation, For quadratic equation the degree is 2.
Leading Coefficient are the constant numbers that are significantly multiplied with the variables in the equation.
==> 5x^2 - 3x - 8 = 0
==> 5x^2 -8x +5x -8=0
==> x(5x-8) +1(5x-8)=0
==> (5x-8)(x+1) = 0
Enter the absolute value of 6.2 and -7/2
Answer:
1, 6.2 and 7/2
Step-by-step explanation:
Answer:
6.2 = 6.2
-7/2= 3.5
Step-by-step explanation:
Because I know, mark brainliest please
simple math for 18 points !!
Hi there!
[tex]\large\boxed{C. \text{ } \$ 272.50}[/tex]
To begin, we can find the amount he is paid from his hourly wage:
$12.75 × 6 = $76.5
Calculate the commission by adding up the sales to get the total:
$1200 + $2350 $975 + $375 = $4900
4% of $4900 = 4900 × 0.04 = 196
Add the total wage and commission together:
76.5 + 196 = $272.50
Answer:
c 272.50
Step-by-step explanation:
Hey Some One Help With This Please
NO LINKS PLEASEEEEEE!
HELP!!
Answer:
option d will match friend
PLS ILL MATK BRIANLDT IF RIGHT IM CHECKING IF RIGHT HURRL PLLLSLSLSSS
Step-by-step explanation:
2 and 4 are the same
angle 2 is 37
What is the mean of the data set?
25, 18, 16, 25
Answer:
21
Step-by-step explanation:
Add all of the numbers and then divide by how many numbers there are.
what is 358 divided by 6
Answer:
59.6
Step-by-step explanation:
:)
Decimal form-59.6
Mixed fraction form-59 2/3
Exact form-179/3
anthony went on a bike ride. He rode two-thirds of a mile in three-fourths of an hour. What was his biking speed in miles per hour?
Give the coordinates of point A.
Answer: -2,-5
Step-by-step explanation:
The red point is located in the 3rd quadrant in the graph. So that means both the y and the x are negative. So first you go by the x value, the point is located on the 2 space left (-) from the origin (center) of the graph and then you have to go 5 spaced down (-). So point A is located at (-2,-5).
Pls help me i need to fill in the boxes that dont have anything in them but i aldo need to fill in the one that says "A="
Answer:
Area= 32 (formula is: length x width)
Perimeter= 8 + 4 + 8 + 4= 24
Step-by-step explanation:
Answer:
A=L·W=32units²
P=24units
Step-by-step explanation:
[tex]A=L*W\\=8*4=32\\area:32units^{2} \\\\P=2(L)+2(W)orL+W+L+W\\=2(8)+2(4)\\=16+8=24\\perimeter:24units[/tex]
Please help marking people as brainlist
PLEASE HELP ILL GIVE BRAINLIEST !!! 100 POINTS !! NO FAKE ANSWERS !
Answer:
qweqw
Step-by-step explanation:
qeqe
Answer now boi/gurl, Tahke yuo
Answer:
Seems like it's B
Step-by-step explanation:
The rest seem wrong.
---↓
A- Jon paid $235.50 for yard work. He paid $25.00 to have some
bushes trimmed and $35.50 each time he had his grass mowed. What is
x, the number of times Jon had his yard mowed? | The equation is 25x + 35.50 = 235.50 . That means this answer is probably wrong.
·
C- Jon paid $235.50 for yard work. He paid $35.50 to have some
bushes trimmed and $25.00 each time he had his grass mowed. What is
x, the number of bushes Jon had trimmed? | Once again, the equation is 25x + 35.50 = 235.50 . That means this answer is probably wrong too.
·
D- Jon and his neighbor paid $235.50 for yard work. Jon paid $35.50 to have some bushes trimmed and his neighbor had some bushes trimmed for $25.00 each. What is x, the amount of money Jon paid to have his bushes trimmed? | It says that Jon paid $35 to have his bushes trimmed in the sentence.
~~~~~~~~~~~~~~~~~~~~
B- Jon paid $235.50 for yard work. He paid $35.50 to have some
bushes trimmed and $25.00 each time he had his grass mowed. What is
x, the number of times Jon had his yard mowed?
The equation is 25x + 35.50 = 235.50 || We would put the x after 25 because it's asking "What is x, the number of times Jon had his yard mowed?" This seems correct.
Therefore, the answer would be B
Which expression is equivalent to 11 -- (3 5/8) ?
A. -3 5/8 --11
B. 3 5/8 + (-11)
C. 11+ 3 5/8
D. 11+ -3 5/8)
HELP ME
Answer:
C.
[tex]11+3\frac{5}{8}[/tex]
Step-by-step explanation:
[tex]11--3\frac{5}{8}[/tex]
[tex]11+3\frac{5}{8}[/tex]
Mary is rolling a standard six-sided die and spinning on a spinner with the number 1-8.
A) Are her dice rolls and spinning outcomes independent or dependent? Explain why.
B) What is the probability of her rolling a 4 and spinning an 8? Show all work.
C) What is the probability of her rolling an even number and spinning a number less than 3? SHOW ALL WORK..
Answer:
a) Dice and spinner are different objects, with no relation between themselves, and thus her dice rolls and spinning outcomes are independent.
b) [tex]\frac{1}{48}[/tex] probability of her rolling a 4 and spinning an 8.
c) [tex]\frac{1}{8}[/tex] probability of her rolling an even number and spinning a number less than 3.
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
A) Are her dice rolls and spinning outcomes independent or dependent?
Dice and spinner are different objects, with no relation between themselves, and thus her dice rolls and spinning outcomes are independent.
B) What is the probability of her rolling a 4 and spinning an 8?
Since the events are independent, we find each separate probability and multiply them.
Probability of rolling a 4:
One side out of 6 on the dice. So
[tex]P(A) = \frac{1}{6}[/tex]
Probability of spinning an 8:
One side out of 8 on the spinner. So
[tex]P(B) = \frac{1}{8}[/tex]
Probability of rolling a 4 and spinning an 8:
[tex]P(A \cap B) = P(A)P(B) = \frac{1}{6} \times \frac{1}{8} = \frac{1}{48}[/tex]
[tex]\frac{1}{48}[/tex] probability of her rolling a 4 and spinning an 8.
C) What is the probability of her rolling an even number and spinning a number less than 3?
Since the events are independent, we find each separate probability and multiply them.
Probability of rolling an even number:
2, 4 or 6(3 sides out of 6). So
[tex]P(A) = \frac{3}{6} = \frac{1}{2}[/tex]
Probability of spinning a number less than 3:
Two numbers(1 or 2) out of 8 on the spinner. So
[tex]P(B) = \frac{2}{8} = \frac{1}{4}[/tex]
Probability of rolling an even number and spinning a number less than 3:
[tex]P(A \cap B) = P(A)P(B) = \frac{1}{2} \times \frac{1}{4} = \frac{1}{8}[/tex]
[tex]\frac{1}{8}[/tex] probability of her rolling an even number and spinning a number less than 3.
44%
Bill needs to build a rectangular sheep pen.
The pen must have a perimeter of 24 m.
Every half metres of fencing cost him £1.20.
a) Work out the cost of fencing used to make
the sheep pen.
The length of the sheep pen is three times its width.
b) Find the length and width of the sheep pen.
Length
metres
Width
metres
Answer:
£57.60
9m
3m
Step-by-step explanation:
cost of fencing = perimeter of the fence x cost of half meter x 2
1.2 x 2 x 24 = £57.60
Perimeter = 2 x ( length + width)
let x = width
length = 3x
2 x (3x + x) = 24
divide both sides of the equation by 2
4x = 12
x = 3
Length = 3 x 3 = 9m
How do you do this question?
Answer:
the answer is 4 of it will help you
Need help please help I got time limit
Answer:
wdym
Step-by-step explanation:
the circumference of an ellipse is approximated by…
9514 1404 393
Answer:
see attached
Step-by-step explanation:
To solve for b, undo what is done to b.
[tex]\displaystyle C=2\pi\sqrt{\frac{a^2+b^2}{2}}\\\\\frac{C}{2\pi}=\sqrt{\frac{a^2+b^2}{2}}\\\\\left(\frac{C}{2\pi}\right)^2=\frac{a^2+b^2}{2}\\\\\frac{C^2}{2\pi^2}=a^2+b^2\\\\\frac{C^2}{2\pi^2}-a^2=b^2\\\\\boxed{b=\sqrt{\frac{C^2}{2\pi^2}-a^2}}[/tex]