Mathematics Middle School

find cos^-1 0.9455 to the nearest degree.
A.26 degrees
B.71 degrees
C.19 degrees
D.41 degrees

Answers

Answer 1
c) 19 degrees

Hope this helped!
Answer 2

Answer:

[tex]Cos^{-1}(0.9455)[/tex] = 19 degree.

Step-by-step explanation:

Given: [tex]Cos^{-1}(0.9455)[/tex].

To find : values of  [tex]Cos^{-1}(0.9455)[/tex].

Solution : We have given that  [tex]Cos^{-1}(0.9455)[/tex].

[tex]Cos^{-1}(0.9455)[/tex].  =0.33166 radians

In form of degree

0.33166 radians =  19 degree.

Therefore,   [tex]Cos^{-1}(0.9455)[/tex] = 19 degree.

Related Questions

Can anyone help me? Or at least explain how you solved the problem

Answers

2/3.3/1=6/3
Answer is 2.
The answer would be 2 because 2/3/1/3 is the same as 2/3 multiplied by 3/1 because you are dividing fractions so you keep change flip.

Find the total surface area of the cube box below

Answers

The surface area of the cube is 24 feet.
We know a cube has 6 equivalent sides. One side has an edge of 2 ft so the other edges are all 2 ft so 6(2 x 2) or 2 x 2 + 2 x 2 + 2 x 2 + 2 x 2 + 2 x 2 + 2 x 2 = 24ft.

Please help me !!! Easy math

Answers

the first one is $10 , the second one is $22

Answer:

i agree with answer above mine

Step-by-step explanation:


The area of a trapezoid is 144 ft squared. If the height is 8 ft and one of the bases is 12 ft, what is the length of the other base?
A. 7.2 ft
B. 14.4 ft
C. 24 ft
D. 16 ft

Answers

144 =  (12 +x)/2 * 8

144 = (12+x)* 4

36 = 12 +x

x = 36-12

x =24

 Answer is C

What is the answer to 2/5 + 7/20 and 6/15 + 14/40

Answers

2/5+7/20=3/4

6/15+14/40=3/4
2 times 5=10 7 times 20 is 140 6 times 15 is 90 and 14 times 40 is 560 and all the anwsers to that and that’s what you get

The ratio of plates to napkins is 3:12. Write the ratio in simplest form.

Answers

The ratio 3:12 in simplest form would be 1:4. We can figure this out by dividing the ratio by 3 which would leave 1 plate to 4 napkins.
I hope this helped! :-)
1:4 is the answer.

The common factor of 3 and 12 is 3.

3 divided by 3 is 1

12 divided by 3 is 4

So you get 1:4

Hope this helped! ♡

th original price of a computer was reduced by $250. if p= the computer original price in dollars. which algebraic expression represents the reduced price

Answers

the algebraic expression would be p-250
The original price is p, it was reduced by $250 so your expression should be

p-250

I need the answers to 5&6 explain how you found the answer and I'll give brainliest

Answers

I found the answer to 5, but I couldn't see the rest of worksheet to solve 6 thoroughly.

Both of these problems can be solved through substitution using the variables that you know equal a number.

For example #5: 5(3)(3)-7(3)+4
45-21= 24, and 24+8=28

That is how you solve number 5 and can also solve 6 the same way using the same method.



Congruency means that two figures or items are exactly the same size and shape. Where in life would it be vitally important for two or more items to be congruent?

Answers

money and the wheels of a car
I agree with Awesome5864. Wheels should be congruent...You need at least 2 of the same size and shape because if you dont the car is going to have one side taller than the other one.
Hope this helps!
Brainliest? Please?

What is the surface area of this design/

Answers

A=lxw so 640in that is your answer

what is yhe best approximation of the value of w?
A) 1.4 cm
B) 4.0 cm
C) 6.0 cm
D) 7.3 cm

Answers

b 4.0 cm because if you think about it the one that says 3.3 cm is actually just slightly shorter than w so it has to be 4.0cm
Answer

B) 4.0 cm

Explanation

First, we can adapt the law of sines to the notation of our triangle:

[tex]\frac{sin(W)}{w} =\frac{sin(U)}{u}[/tex]

Now, we can infer from our diagram that [tex]W=39[/tex], [tex]U=31[/tex], and [tex]u=3.3[/tex], so we can replace the values in our previous expression:

[tex]\frac{sin(W)}{w} =\frac{sin(U)}{u}[/tex]

[tex]\frac{sin(39)}{w} =\frac{sin(31)}{3.3}[/tex]

Finally, we can solve for [tex]w[/tex]:

[tex]\frac{3.3sin(39)}{w} =sin(31)[/tex]

[tex]3.3sin(39)=wsin(31)[/tex]

[tex]\frac{3.3sin(39)}{sin(31)} =w[/tex]

[tex]w=\frac{3.3sin(39)}{sin(31)}[/tex]

[tex]w=4.03224[/tex]

Which rounds to [tex]w=4.0[/tex]

We can conclude that the best approximation of w is 4.0 cm

The volume of a right rectangular shipping carton is 948.75 cubic meters. The height of the shipping carton is 11 meters, and the width is 7.5 meters. What is the length of the shipping carton? Enter your answer as a decimal in the box.

Answers

11.5 meters I think.. took teh test

If volume of a right rectangular shipping carton is 948.75 cubic meters and the height of the shipping carton is 11 meters, and the width is 7.5 meters then length is 11.5 meters.

What is Three dimensional shape?

a three dimensional shape can be defined as a solid figure or an object or shape that has three dimensions—length, width, and height.

Given that volume of a right rectangular shipping carton is 948.75 cubic meters.

The height of the shipping carton is 11 meters, and the width is 7.5 meters.

We have to find the  length of the shipping carton

V=Length × width × height

V= Length x 7.5 x 11

948.75 = 82.5 length

Divide both sides by 82.5

Length = 948.75/82.5

Length = 11.5 meters

Hence, if volume of a right rectangular shipping carton is 948.75 cubic meters and the height of the shipping carton is 11 meters, and the width is 7.5 meters then length is 11.5 meters.

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a circular rug is 6 feet in diameter. binding for the edge costs $1.50 per yard. what will it cost to bind the rug? justify your answer

Answers

C = circumference or perimeter of circle

d = diameter length

C = πd

How many yards in 6 feet?

1 yard = 3 feet

So, 2 yards = 6 feet

C = π(2 yards)

C = 2π yards

Each yard is $1.50.

So, what do you think we do next?

Can you finish?

What is the solution to the system of equations?

2x – y = 7

y = 2x + 3

(2, 3)
(2, 7)
no solution
infinite number of solutions

Answers

No solution would be the answer.
ANSWER


The given system of equations has no solution.

EXPLANATION

We write the two equations in the slope-intercept form,

[tex]y = mx + c[/tex]


The first equation is
[tex]2x - y = 7[/tex]

We make y the subject to obtain,

[tex]y = 2x - 7 - - (1)[/tex]

The second equation is already in slope intercept form.


[tex]y = 2x + 3 - - (2)[/tex]



We can see that the two equations have the same slope but different y-intercept. This implies that, the two equations will never intersect. Therefore the system of equations has no solution.



Gene has a gasoline budget of $275 per month. He uses an average of $7 of gasoline each day he drives. Which of the following equations represents how much money is left in his gasoline budget after x days of driving?

Answers

Final answer:

The equation to represent how much money is left in Gene's gasoline budget after driving for x days is y = 275 - 7x, where x is the number of days Gene drives and y is the money left in the budget.

Explanation:

The equation representing how much money is left in Gene's gasoline budget after driving for x days can be expressed as y = 275 - 7x. Here, 275 represents the monthly gasoline budget, 7 is the cost of gasoline each day, and x is the number of days. If we plot y against x, we can visualize how Gene's monthly gasoline budget decreases by $7 for each day he drives.

This equation is a simple example of a linear equation, which describes a straight line in a coordinate system. The variable x is the independent variable (number of days driven) and y is the dependent variable (money left in the budget). The slope of the line (-7) represents the rate at which the budget decreases each day.

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The ratio of the number of boys to the number of girls in the class is 1:6. Which statement must describe the class?

A) There are exactly 7 students in the class.

B) There is 1 boy for every 6 girls in the class.

C) There are 5 more girls than boys in the class.

D) There is 1 boy out of the 6 students in the class.

Answers

Your answers either A or B but im leaning more towards A

: ) have  a nice day

Answer: B

Step-by-step explanation: If it is asking the ratio from boys to girls the boy would be 1 and the girl would be 6 so the ratio is for every one boy is six girls. So it would be B.

Lucy is a dress maker. She sews 4/7 of a dress in 3/4 hour. Lucy sews at a constant rate. At this rate, how many dresses does Lucy sew in one?

Answers

To find out how many dresses she can sew in one hour, divide the fraction of the dress she makes by the number of hours it takes for her to make the dress.

[tex]\sf\dfrac{4}{7}\div\dfrac{3}{4}[/tex]

When dividing fractions we flip the one we're dividing by and multiply:

[tex]\sf\dfrac{4}{7}\times\dfrac{4}{3}[/tex]

Multiply the numerators and denominators together:

[tex]\boxed{\sf\dfrac{16}{21}}[/tex]

So she sews 16/21 of a dress in one hour.

7.2 = 8t
t = ???
I need a little help with this one
sorry...

Answers

You have to get t alone so you divide both sides by 8
7.2/8= 0.9 and 8t/8=t
T=0.9
Hey!
There is no problem with needing a little help, no need to apologize. To solve this use the  inverse operation of multiplication (division) to solve. See photo :D

Cheers,
Izzy

Graph the function y=x+8 ?

Answers

Hope I helped!

Let me know if you need anything else!

~ Zoe

4(2.1k-4)=6(3.4k-2) what does (K) equal?

Answers

Hey there.

4(2.1k - 4) = 6(3.4k - 2); apply the distributive property to remove the parenthesis.
8.4k - 16 = 20.4k - 12; Get the variable to one side, so subtract 8.4k.
-16 = 12k - 12; isolate the variable by adding 12.
-4 = 12k; divide by 12 to solve for our variable.
k = -1/3

I hope this helps!

Help with 3 and show all work

Answers

x<=50.

< is less than
> is greater than

Without him paying the extra fee is <=50
x is pounds.
Now, you have x<=50.

Hope this helped☺☺
Hi there!

The answer should be x<=50, or x is less than or equal to 50.

Your previous answer was almost correct, but the inequality actually has a less than or equal to sign since Michael could still be at exactly 50 pounds without having to pay extra. The charge only applies when the weight is more than 50 pounds.

Hope this helps!

if the selling price is $18.00 and the markup is 33%.what is te dollar markdown?

Answers

the answer is 16.67 hope this helps
Good night. How ru?

If the markup is 33%, then the markdown is 67%

(18*67)/100 = x
1.206/100 = x
100x = 1.206
x = 1.206/100
x = 12,06$

A probability experiment is conducted wich of these can not be considered a probability of an outcome: a) 0.222 b) 8.2% c) 0.0234 d) 122.96% e) 5/3 f) 0.45%

Answers

Probability can only range from 0 to 1 and d) 122.96% and e) 5/3 is bigger than 1 so the answer would be d and e.

122.96% and 5/3 cannot be considered probabilities of outcomes in a probability experiment because they are greater than 1. Correct option is d and e.

In probability, the probability of an outcome must be a value between 0 and 1, inclusive. Therefore, any value less than 0 or greater than 1 cannot be considered a probability of an outcome.

Let's check each option:

a) 0.222 - This is a valid probability since it is between 0 and 1.

b) 8.2% - This can be converted to a decimal as 0.082, which is a valid probability since it is between 0 and 1.

c) 0.0234 - This is a valid probability since it is between 0 and 1.

d) 122.96% - This can be converted to a decimal as 1.2296, which is not a valid probability since it is greater than 1.

e) 5/3 - This can be simplified to approximately 1.6667, which is not a valid probability since it is greater than 1.

f) 0.45% - This can be converted to a decimal as 0.0045, which is a valid probability since it is between 0 and 1.

Therefore, options (d) 122.96% and (e) 5/3 cannot be considered probabilities of outcomes in a probability experiment because they are greater than 1. The other options are valid probabilities as they fall within the range of 0 to 1, inclusive.

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everyday on her way home from school, Minnie usea $1 to buy a bag of chips. The bag cost $0.75, and she saves the remaining quarter in her change jar. Minnie buys 5 bags of chips per week. At this rate, how long will it take her to save $10.00

Answers

If she saves $1.25 a week ,divide it by 10 and you get 8 weeks. It would take her 8 weeks to save $10.00 hope this helped :)

show your work and simplify the expression (x – 2) (3x-4)

Answers

The answer is 3x^2-10x+8.

(x - 2)(3x - 4)

Remember F.O.I.L

First
Outside
Inside 
Last

First: x * 3x = 3x^2

Outside: x * -4 = -4x

Inside: -2 * 3x = -6x

Last: -2 * -4 = 8

3x^2 - 4x -6x + 8

Now, combine like terms.

3x^2 - 10x + 8


Hope I helped!

I'd be very happy to help if you need anything else!

~ Zoe

What is 2x2 ? Plz I need the answer .

Answers

the answer is to the question you asked is 4
2x2 is 4.
All you are doing is multiplying 2 by 2, doubling it.
Hope this helped<3

PLZ HELP!!!!!! (WILL GIVE BRAINLIEST!!!!)


Answers

You can use feet or inches because they are both on the diagram and they are both a part of the same measuring system. If you use inches, you would be using larger numbers, but if you used feet, you would be using fractions.

"write an equation in slope-intercept form of the line satisfying the given conditions."

The line passes through (-3,2) and is parallel to the line whose equation is y = 4x + 1.

How do I do this problem? Show all work.

Answers

The given line has a slope of 4. 
This is because y = 4x+1 is in the form y = mx+b (m = 4 is the slope)

Any line parallel to the given line is also going to have the same slope of m = 4

Plug in m = 4 and (x,y) = (-3,2) and then solve for b
y = mx+b
2 = 4(-3)+b
2 = -12+b
2+12 = -12+b+12
14 = b
b = 14

So m = 4 and b = 14 means that y = mx+b turns into y = 4x+14

----------------------------------------

Final Answer: y = 4x+14

Please help!! Due soon

Answers

Answer: 24 cm

-----------------------------------------------

Explanation:

Let
P = area of triangle ABC
Q = area of triangle ACD

The two areas mentioned above are in ratio 1.5:1 which basically means 
P = 1.5*k
Q = 1*k
for some value k
Notice how P/Q = (1.5k)/(1k) = 1.5 which proves that P:Q = 1.5:1

We can find the value of k by determining the area of triangle ABC
P = area of triangle ABC
P = (base)*(height)/2
P = 36*10/2
P = 360/2
P = 180

If P = 180, then
P = 1.5*k
1.5*k = 180
k = 180/1.5
k = 120

Telling us that
Q = 1*k
Q = 1*120
Q = 120
Q = area of triangle ACD
area of triangle ACD = 120 
note how P/Q = 180/120 = 1.5 so P:Q = 1.5:1

We'll use this area to find the base of triangle ACD which is AD

Area of Triangle ACD = (base)*(height)/2
120 = AD*10/2
120*2 = AD*10
240 = AD*10
240/10 = AD
24 = AD
AD = 24

a 20 foot ladder leans against a wall so that the base of the ladder is 8 feet from the base of the building. what angle does the ladder make with the ground?

Answers

66.42° you can just do 66.4°

use cos(x)8/20

The ladder makes an angle of 63.43 degrees with the ground.

What is Trigonometry?

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

Given that 20 foot ladder leans against a wall so that the base of the ladder is 8 feet from the base of the building

We need to find the angle which the ladder make with the ground.

tan(x) = opposite side / adjacent side

In this case, the opposite side is the height of the building, which is 20 feet.

The adjacent side is the distance from the wall to the base of the ladder, which is 8 feet.

Plugging in the values:

tan(x) = 20 / 8

x=tan⁻¹(20/8)

x=63.43 degrees

x is the angle

Hence, the ladder makes an angle of 63.43 degrees with the ground.

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