please help with the problem bellow

Answer:

Step-by-step explanation:

1  2/3  + 3 3/4 = 1  8/12 + 3  9/12 = 4 17/12 = 5 5/12

4 1/2 + 2 5/7 = 4 7/14 + 2 10/14 = 6 17/14 = 7 3/14

3/4 + 2/3 + 1/5 = 45/60 + 40/60 + 12/60 = 97/60 = 1 37/60

Answer:

Step-by-step explanation:

boom  = 1 37/60

Answer:

A.  r = ∛ 15V / 2π

Step-by-step explanation:

Volume of a sphere = 4/3 π r³    

And to be divided into 10 equal wedges parts.

Volume of each wedge = V = 2/15 π r³

find r

V = 2 π r³ / 15

15 V = 2 π r³

15V / 2π = r³

r = ∛ 15V / 2π

The correct option will be option A i.e., r = [tex]\sqrt[3]{\frac{15}{2\pi } }[/tex]

It is given that a solid sphere is cut into 10 equal wedges , with each wedge having volume V = [tex]\frac{2}{15} \pi r^{3}[/tex]

We have to solve it to get the value of radius r.

What is the formula for volume of sphere ?

The volume of sphere is given by V = [tex]\frac{4}{3} \pi r^{3}[/tex] where , r is the radius of the sphere.

As per the question ;

Volume of sphere =  [tex]\frac{4}{3} \pi r^{3}[/tex]

To be divided into 10 equal wedges ;

Volume of each wedge of sphere will be ;

V = [tex]\frac{2}{15} \pi r^{3}[/tex]

15 V = 2[tex]\pi r^{3}[/tex]

or

r³ = [tex]\frac{15V}{2\pi }[/tex]

or

r = [tex]\sqrt[3]{\frac{15}{2\pi } }[/tex]

Thus , the correct option will be option A i.e., r = [tex]\sqrt[3]{\frac{15}{2\pi } }[/tex]

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Answer:

8

Step-by-step explanation:

8 is in "One's place".

So, that number is multiplied with 1

=> 8 x 1

=> 8

The value of 8 is 48 = 8

Answer:

[tex](\frac{1}{\sqrt{2} }, \frac{-1}{\sqrt{2} } )[/tex]

Step-by-step explanation:

The unit vector for a nonzero vector, say u, in the direction of u is given by:

û = [tex]\frac{u}{|u|}[/tex]             ---------------(i)

Where;

|u| = magnitude of vector u

From the question;

u = (4, -4)

First let's calculate the magnitude of u as follows;

|u| = [tex]\sqrt{(4)^2 + (-4)^2}[/tex]

|u| = [tex]\sqrt{16 + 16}[/tex]

|u| = [tex]\sqrt{32}[/tex] = [tex]4\sqrt{2}[/tex]

Now, substitute u and |u| into equation (i) as follows;

û = [tex]\frac{(4, -4)}{4\sqrt{2} }[/tex]

û = [tex](\frac{4}{4\sqrt{2} }, \frac{-4}{4\sqrt{2} } )[/tex]

û = [tex](\frac{1}{\sqrt{2} }, \frac{-1}{\sqrt{2} } )[/tex]

Therefore, the unit vector is [tex](\frac{1}{\sqrt{2} }, \frac{-1}{\sqrt{2} } )[/tex]

Answer:

Sum of the sequence (Sn) = 33,859

Step-by-step explanation:

Given:

Sequence = 685+678+671+664+...+6

Find:

Sum of the sequence (Sn)

Computation:

a = 685

d = 678 - 985 = -7

an = 6

an = a+(n-1)d

6 = 685+(n-1)(-7)

-679 = (n-1)(-7)

97 = n-1

n = 98

So,

Sum of the sequence (Sn) = (n/2)[a+an]

Sum of the sequence (Sn) = (98/2)[685+6]

Sum of the sequence (Sn) = (49)(691)

Sum of the sequence (Sn) = 33,859

Answer:

  8

Step-by-step explanation:

The midpoint of AC is ...

  B = (A +C)/2 = (-10 +14)/2 = 2

The midpoint of BC is ...

  D = (B +C)/2 = (2 +14)/2 = 8

The midpoint of BC is 8.

Answer:

50.24

Step-by-step explanation:

The formula for the area of a circle is

Area = 3.14 (π) x radius squared [tex]4^{2[/tex]

Area = 3.14 (π) x (4 x 4)

Area = 3.14 (π) x 16

Area = 50.24

Step 1) Set up a proportion

180 girls / x boys = 4 girls / 3 boys

540 = 4x

x = 135 boys

Step 2) Add the number of boys and girls together

180 + 135 = 315

Answer: 315 total students

Answer:

the anwser is 6

Step-by-step explanation:

Answer:

x<6

Step one Pull out like factors :

6x - 36  =   6 • (x - 6)

Step two: Solve : 6   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Step three: Solve  :    x-6 = 0

Add  6  to both sides of the equation :

                     x = 6

Hoped I helped

Answer:

49

Step-by-step explanation:

area if a square: side length x side length (s^2)

7 x 7 = 49

Area of Square is 49 square feet

Given that;

Side length of square = 7 feet

Find:

Area of Square

Computation:

Area of Square = Side²

Area of Square = 7²

Area of Square = 49 square feet

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Answer:o

Step-by-step explanation:

Given :

Given a curve , [tex]y=2x^2[/tex] .

To Find :

The area of the region between the given curve and the​ x-axis on the interval [0, b] .

Solution :

Now , area under the curve is given by :

[tex]A=\int\limits^b_0 {2x^2} \, dx \\\\A= |_0^b(\dfrac{2}{3}x^{(2+1)})\\\\A=\dfrac{2b^3}{3}[/tex]

( Integration of [tex]x^2[/tex] is [tex]\dfrac{x^3}{3}[/tex] )

Therefore , the region between the given curve and the​ x-axis on the interval [0, b] is [tex]\dfrac{2b^3}{3}[/tex] .

Hence , this is the required solution .

Answer:

A and B.

Step-by-step explanation:

So we want to select the fractions that equal -1/7.

Let's go through each of the answer choices.

A)

A is -1/7, the exact same.

A is correct.

B)

B is 1/-7.

We can move the negative to the top.

So, 1/-7 is equivalent to -1/7.

B is also correct.

C)

C is 1/7

There are no negatives whatsoever.

C is not correct.

D)

We have -1/-7.

Again, move the negative to the top. We will have:

-(-1)/7

The two negatives cancel:

=1/7.

So, D is not correct.

Our answers are A and B.

Answer:  A) f(x) = x² + 2x + 1

Step-by-step explanation:

The standard form of a quadratic equation is: y = Ax² + Bx + C

Input (x, y) coordinates into the standard equation to solve for A, B, & C.

(0, 1) →  1 = A(0)² + B(0) + C

            1 = C

(-2, 1) → 1 = A(-2)² + B(-2) + C

            1 = 4A - 2B + 1

            0 = 4A - 2B

(1, 4) → 4 = A(1)² + B(1) + C

           4 = A + C + 1

           3 = A + B

Solve the system of equations:

0 = 4A - 2B   →   1(0 = 4A - 2B)   →     0 = 4A - 2B

3 = A + B       →  2(3 = A + B)      →      6 = 2A + 2B

                                                           6 = 6A

                                                           1 = A

Input A = 1 into either equation to solve for B:

3 = A + B

3 = 1 + B

2 = B

Now, Input A = 1, B = 2, and C = 1 into the standard equation:

y = (1)x² + (2)x + (1)

y = x² + 2x + 1

Answer:

34.9% of the data in a standard normal distribution lies between x = .09 and x = 1.2.

Step-by-step explanation:

We have to find the percentage of the data in a standard normal distribution that lies between X = 0.09 and X = 1.2.

As we know that the mean and the standard deviation of a standard normal distribution is 0 and 1 respectively.

The z-score probability distribution for the standard normal distribution is given by;

                          Z  =  [tex]\frac{X-\mu}{\sigma}[/tex] = [tex]\frac{X-0}{1}[/tex]  ~ Standard normal

Now, the percentage of the data in a standard normal distribution that lies between X = 0.09 and X = 1.2 is given by = P(0.09 < X < 1.2)

        P(0.09 < X < 1.2) = P(X < 1.2) - P(X [tex]\leq[/tex] 0.09)

       P(X < 1.2) = P( [tex]\frac{X-0}{1}[/tex] < [tex]\frac{1.2-0}{1}[/tex] ) = P(Z < 1.2) = 0.8849

       P(X [tex]\leq[/tex] 0.09) = P( [tex]\frac{X-0}{1}[/tex] [tex]\leq[/tex] [tex]\frac{0.09-0}{1}[/tex] ) = P(Z [tex]\leq[/tex] 0.09) = 0.5359

The above probabilities are calculated by looking at the value of z = 1.2 and x = 0.09 in the z table which has an area of 0.8849 and 0.5359 respectively.

Therefore, P(0.09 < X < 1.2) = 0.8849 - 0.5359 = 0.349.    

Answer:

c

Step-by-step explanation:

Please see attached picture for full solution.

Answer:

0.193877

Step-by-step explanation:

The data given to us is

Pre-Employment Drug Screening Results

                    Positive test result                 Negative test result

                    Drug Use Is Indicated            Drug Use Is Not Indicated

Subject Uses Drugs:            38                                         12

Subject Is Not a drug user: 19                                         29

Now the total of this is = 38+19+12+29= 98

Now the probability of false positive is = 19/98= 0.193877

The Subject Is Not a drug user  would suffer from a false positive. He is not a user and has a positive result.

Answer:

(3,-1)

Step-by-step explanation:

So we have the system of equations:

[tex]3x+y=8\\2x-y=7[/tex]

As directed, add straight down. The y-variable will cancel:

[tex]5x=15[/tex]

Now, divide both sides by 5. The left cancels:

[tex]x=3[/tex]

So x is 3.

Now, substitute 3 for x in either of the equations:

[tex]3x+y=8[/tex]

Substitute 3 for x:

[tex]3(3)+y=8[/tex]

Multiply:

[tex]9+y=8[/tex]

Subtract 9 from both sides:

[tex]y=-1[/tex]

So, our answer is: x=3, y=-1 or (3,-1).

And we are done :)

Complete Question:

In ABC, the measure of sides c is 3.9 cm If DEF is a dilation ABC with a scale factor of 2.5 what is the measure of side f

Answer:

f = 9.75

Step-by-step Explanation:

From the information given, a sketch of ∆ABC and ∆DEF with their corresponding sides and angles have been attached below.

∆DEF is a dilation of ∆ABC, which is said to be on a scale factor of 2.5.

The scale factor is a whole number, this implies that ∆DEF is an enlargement of ∆ABC.

Since side c = 3.9 cm, in ∆ABC corresponds to side f, in ∆DEF, therefore, the measure of f would be:

f = measure of c × scale factor

f = 3.9 cm × 2.5

f = 9.75

Answer:

About 1.3 times faster.

Step-by-step explanation:

First set up an inequality.

[tex]\frac{37.45}{47.5}[/tex] =[tex]\frac{x}{y}[/tex]

Now divide top and bottom by 37.45 And you would get 1.26..... which is rounded to about 1.3

Please give brainliest thanks

39x - 11 = 17x + 6

Answer is A

Answer:

The answer is

Step-by-step explanation:

First of all separate the two from the x

That's

Next we use the rules of indices

Since they have the same base and are dividing we subtract the exponents

That's

So we have

We have the final answer as

Hope this helps you

Answer:

  5/6 cups/lemon

Step-by-step explanation:

(15 cups)/(18 lemons) = (15/18) cups/lemon = 5/6 cups/lemon

Answer:

guess

Step-by-step explanation:

i ain't going to cap but idk

Answer:

You can insert any number instead of X and y because they are Variables.

Answer:

2,640 miles in 12 hours.

Step-by-step explanation:

440/2=220mph

220*12 hours=2,640

rate of speed=220pmh

Answer:

1. 1.23

2. 15400

3. 0.0025

4. 0.567

5. 100000000

6. 0.00000001

Step-by-step explanation:

you just move the decimal point left for negative and right for positive

Answer:

[tex]f(x) = |2\cdot x^{2}+x|[/tex] and [tex]g(x) = x+1[/tex]

Step-by-step explanation:

Let [tex]f \circ g\, (x) = |2\cdot (x+1)^{2}+(x+1)|[/tex], a composition consist in replacing the variable of the first function ([tex]f(x)[/tex]) with the second function ([tex]g(x)[/tex]). By observation, it is quite evident that [tex]g(x) = x+1[/tex], whereas [tex]f(x) = |2\cdot x^{2}+x|[/tex].

Answer:

D on edg

Step-by-step explanation:

got it right

Answer:

7.00

Step-by-step explanation:

so you have to round to the narest 0.01 the easy way to do it is round to the hundreth place. And you will get your answer which is 7.00