19. The present age of brother and sister are in the ration 4:5 Before three years the ration of their age was 3:4. find their present age-​

GIVEN:

We are told that Barbara works 2/5 of her time doing paper work and this fraction represents 10 hours of her total working time.

Required;

To determine how many hours she will have to work in order to have 10 hours doing paper work.

Step-by-step solution.

Take note that her entire working hours is represented by 1 whole since, a fraction of it has already been identified as two-fifths.

This means

Take note that the fraction is taken as two-fifths of the total hours h and, if multiplied by the total hours, we would get 10 hours.

Hence, if we simplify the above equation, we would get the value of h as follows;

Therefore,

ANSWER:

Barbara has to work for 25 hours in order to spend 10 hours on paper work.

Answer:

1. I believe some solutions could be x= -7, x= -8, x= -9 etc.

Step-by-step explanation:

2. If the inequality was -3x is greater than or equal to 18 then x and also be equal to x=6.

The solution is option a)

How to graph an equation?

To graph an equation using the slope and y-intercept. Write the equation in the form y = mx + b to find the slope m and the y-intercept (0, b). Next, plot the y-intercept. From the y-intercept, move up or down and left or right, depending on whether the slope is positive or negative.

Given data ,

Let the function be f ( x ) = ( 1 / 2 ) x⁵

Now , to know which graph represents the equation mentioned, you can put some values of x in the equation and evaluate the value of y

So , when x = 1

y = ( 1 / 2 )

when x = 2

y = ( 1 / 2 ) × 2⁵

  = 2⁴

  = 16

when x = -1

y= ( 1 / 2 ) × ( -1 )⁵

 = - ( 1 / 2 )

So , by plotting all the points of x and y in the graph , Option a ) satisfies the solution

Hence , the solution is Option a)

To learn more about equation from graph click :

https://brainly.com/question/19034995

#SPJ2

Write 3 3/4 as a fraction:

Use conversion factor to find the exact number of loaves that Maliyah can make with 3 3/4 (15/4) cups of dough.

1 loaf requires 1/6 of cup of dough.

You can write the answer as a mixed number:

Then, with 3 3/4 cups of dough Maliyah can make 22 1/2 (45/2) loaves of bread.

Answer:

3.90 sq cm

Step-by-step explanation:

\(A_{equilateral\: \triangle} = \frac{ \sqrt{3} }{4} \times {(side)}^{2} \\ \\ = \frac{ \sqrt{3} }{4} \times {(3)}^{2} \\ \\ = \frac{9 \sqrt{3} }{4} \\ \\ = 3.89711432 \: {cm}^{2} \\ \\ \approx \: 3.90 \: {cm}^{2} \)

Answer:

That fourth ordered pair is (4, -1)

Step-by-step explanation:

A rectangle is a set of permutations of x and y

x can either be -1, or 4

y can either be -1, or 1

the only one missing from this set is (4, -1)

Input:

{F(x) = 3 x + 1, 1/f = x - 1/3 f(2)}

Result:

{F(x) = 3 x + 1, 1/f = x - f(2)/3}

Alternate forms:

{3 x + 1 = F(x), 3 x = f(2) + 3/f}

{F(x) = 3 x + 1, f(2) = 3 x - 3/f}

{F(x) = 3 x + 1, 1/f = 1/3 (3 x - f(2))}

Alternate form assuming f and x are positive:

{3 x + 1 = F(x), 3 f x = f(2) f + 3}

Answer:

hey, i just did this question and double checked everything and i got a different answer.

So C, =x^2−25 should be the correct one

Step-by-step explanation:

good luck on the test

The required scale factor of the dilation, between the triangles, is 3/4.2.

Transform the shapes on a coordinate plane by rotating, reflecting, or translating them. Felix Klein introduced transformational geometry, a fresh viewpoint on geometry, in the 19th century.

Here,
To determine, a sequence of rigid transformations that could take one triangle to another.

Since as we can see, the triangles have certain dilation, translation, and reflection. As for the data given, we can only calculate the dilation factor or scale factor only.

So,
Scale factor = Length of the one side of 1st triangle/length of 2nd triangle.

Scale factor = 6/8.4
Scale factor = 3/4.2

Thus, the required scale factor of the dilation, between the triangles is 3/4.2.

Learn more about transformation here:
brainly.com/question/18065245

#SPJ1

Answer:

Step-by-step explanation:

volume=10 1/2 ×2 3/4 ×5

=21/2×11/4×5=1155/8=144 3/8 cubic inch

Answer:

6

Step-by-step explanation:

hope this helps

The number of silver coins Lily initially had is 28.

A ratio is described as a comparing two quantities with the same unit to determine the amount of each quantity is existent in the other. Ratios are divided into two types.

Now according to the question;

Let 'x' be the share of silver coin of Lily.

Let 'y' be the share of silver coin of Nada.

Lily and Nada share silver coins in the ratio 7:3

Thus, x/y = 7/3

Cross-multiplying

3x = 7y (equation 1)

Now, if Lily gives 3 silver coins to Nada, the ratio becomes 5:3.

(x - 3)/(y + 3) = 5/3

cross multiplying;

3x - 9 = 5y + 15

Simplifying;

3x  = 5y + 24 (equation 2)

Comparing equation 1 and 2.

7y = 5y + 24

2y = 24

y = 12 (Nada's share)

Substitute the value of y in equation 1;

3x = 7y

3x = 7×12

x = 28

Therefore, the initial share if Lily was 28.

To know more about the ratios, here

https://brainly.com/question/2914376

#SPJ4

American adults believes in alien for the  given 95% confidence interval and sample surveyed is in the interval range of ( 0.66 , 0.78 ).

As given in the question,

Sample of American adults surveyed 'n' = 200

Percent of people believes in aliens are success  'p'= 72%

                                                                                      = 0.72

Percent of people who don't believes (failure) in aliens ' 1 - p'  = 1 - 0.72

                                                                                          = 0.28                                                                                    

95% Confidence interval that represents Americans adults who believes in aliens

value of z - score for 95% confidence interval = ± 1.96

Margin of error 'MOE'= (z-score)√p ( 1- p) /n

                                   = ( 1.96)√(0.72 × ( 1 - 0.72 )/ 200

                                   = 1.96 ( √0.2016 / 200)

                                   = 1.96 ×√0.001008

                                   = 0.063

Lower limit = p - MOE

                 = 0.72 - 0.063

                 = 0.66

Upper limit =  p + Margin of error

                 = 0.72 + 0.063

                 = 0.78

Therefore, 95% confidence interval with sample size of the Americans adults who believes in alien are in the interval of ( 0.66 , 0.78 ).

Learn more about sample here

brainly.com/question/11045407

#SPJ4

Answer:

Margo walks 1 mile

Step-by-step explanation:

Given that;

Margo walks to her friend's house in 10 minutes.

Using the same route, it takes Margo 20 minutes to get back home.

Total walking rate = 20+ 10 = 30 minutes

The average of her walking rate for the entire trip is 4 miles per hour

i.e 30/2 minutes = 4 miles/hr

15 minutes = 4 miles/hr

Let x be the total number of miles that Margo walk;

So;

15 minutes × x  = 4 miles/hr

15 minutes × x = 4 miles/ 60 minutes

x  = (4 miles/ 60 minutes) × 15 minutes

x  = 1 mile

Thus, Margo walks 1 mile

Answer:

Margo walks 1 mile

Step-by-step explanation:

Nina pay in property taxes 501. or \(5.01*10^{2}\).

A property tax, often known as a millage rate, is an ad valorem tax based on a property's value. The tax is imposed by the administrative body of the region where the property is situated. This could be the federal government, a federated state, a county, a region of land, or a municipality. The average effective property tax rate in the Lone Star State is 1.60%, making Texas' property taxes the seventh-highest in the nation. Comparing that to the current 0.99% national average will help. Property taxes in Texas cost the average homeowner $3,797 a year. It is well known that British property owners do not pay property tax. But hold on, it's too soon to celebrate because there might still be taxes to pay.

Based on the given conditions, formulate:

3340*15%

Calculate.

501

Alternative forms.

\(5.01*10^{2}\)

Learn more about property taxes here

https://brainly.com/question/30021587

#SPJ1

Answer:

Input:

500×500×2

Result:

500000

Step-by-step explanation:

here is how i got the answer

500000

SOLUTION STEPS :

2 ^5  × 5^6 Which equals 500000.

________________________________________________________

hope this helps, let me know if i am wrong, and Brainliest?

The area of the triangle ABC is 6 square centimeters.

To find the area of the triangle, we can use Heron's formula, which is based on the lengths of the triangle's sides. Heron's formula states that the area (A) of a triangle with side lengths a, b, and c can be calculated using the following formula:

A = √(s(s-a)(s-b)(s-c))

where s is the semi-perimeter of the triangle, calculated as:

s = (a + b + c) / 2

In this case, the side lengths are given as a = 4 cm, b = 5 cm, and c = 3 cm.

Calculating the semi-perimeter:

s = (4 + 5 + 3) / 2 = 6 cm

Using Heron's formula:

A = √(6(6-4)(6-5)(6-3))

= √(621*3)

= √(36)

= 6 cm²

Therefore, the area of triangle ABC is 6 square centimeters.

Learn more about area here:

https://brainly.com/question/28642423

#SPJ11

Answer:

2 triangles + 3 different rectangles = total surface of the triangular prism

Step-by-Step:

Honestly, the best way I can help you is to give you a proper way but you must know how to find each area on each shape of the triangular prism.

First, Calculate each Triangle by its area.

1/2 times base times height = surface area of triangle

Then, Calculate each Rectangle by its area.

base times height = surface area of rectangle

Once you have each area of the shape of the prism, you add all of them to get the total surface area.

2 triangles + 3 different rectangles = total surface of the triangular prism

A hypothesis is an educated guess about a phenomenon that can be tested through experimentation or observation. The null hypothesis is the hypothesis that nothing is happening, and the alternative hypothesis is the hypothesis that there is an effect or difference. Reasonable doubt about a null hypothesis can be raised by finding evidence that contradicts it. A p-value is the probability that the results obtained in a study or experiment occurred by chance alone.

After analyzing a set of data, if the results support a hypothesis, this does not prove the hypothesis is true. This means the hypothesis is consistent with the data but further evidence or experimentation must be done to truly prove the hypothesis. After analyzing a set of data, if the results are inconsistent with a hypothesis, this does not prove the hypothesis is false. It could be due to chance or an inadequately tested hypothesis.

The reasoning of hypothesis testing is to determine if the results of a study or experiment support the null hypothesis or alternative hypothesis. A two-sided alternative hypothesis is when the difference between two groups is tested to be either greater or lesser than the reference value, whereas a one-sided alternative hypothesis tests the difference to be only greater or lesser than the reference value. A one-sided test is more conservative than a two-sided test as the former has a higher risk of making a type II error. The size of the effect when testing a hypothesis can be measured by the power of the test and the magnitude of the effect.

To know more about hypothesis refer here:

https://brainly.com/question/29519577

#SPJ11

Answer:

a < 16

Step-by-step explanation:

We must get a alone to solve this. So first multiply by 2

3a/2 < 24

*2

3a < 48

Divide by 3

a < 16

how are we suposed to do this

Answer:

One solution

Step-by-step explanation:

So long as you don't have any term x² or to a power higher than 2, the equation will have 1 solution only.

Answer:

2.18 ounces

Step-by-step explanation:

12/5.5=2.181...

rounded it is 2.18

hope this helps :3

if it did pls mark brainliest

Answer:

200 in2

Step-by-step explanation:

diameter= 15 in. so raduis = 15/2

area of circle = πr2

= 22/7 * 15/2 *15/2

= 176.79

rounding to the nearest 100, its 200 in2

Answer:

the distance from Minneapolis to Duluth is 137 miles

Step-by-step explanation:

The computation of the distance from Minneapolis to Duluth is shown below:

Given that

The cost per mile is $0.40

And, the total trip cost is $54.80

So based on the above information

The distance from Minneapolis to Duluth is

= $54.80 ÷ $0.40

= 137 miles

Hence, the distance from Minneapolis to Duluth is 137 miles

The same would be considered

Answer:

-8.5 and 7.5

Step-by-step explanation:

Let's call the two numbers x and y. We know that their difference is 16, so we can write:

x - y = 16 or x = y + 16

We want to find the values of x and y that minimize the expression:

x + y + xy

Substituting x = y + 16, we get:

(y + 16) + y + (y + 16)y

Simplifying and expanding, we get:

y^2 + 17y + 16

To minimize this expression, we can take its derivative with respect to y and set it equal to 0:

d/dy (y^2 + 17y + 16) = 2y + 17 = 0

Solving for y, we get:

y = -8.5

Substituting y = -8.5 into x = y + 16, we get:

x = 7.5

Therefore, the two numbers with a difference of 16 such that the result of adding their sum and their product is a minimum are -8.5 and 7.5.

Answer:

Hi! This question tells us that the book costs $18 and that it costs 3 times more than a DVD. In order to determine the cost of the DVD, all we have to do is divide 18 by 3. 18 divided by 3 is 6. Therefore, the DVD costs $6.

Hope this helps!

Answer:$6

Step-by-step explanation: 18÷3=6

Answer:

52 units²

Step-by-step explanation:

A = L × W

Area = Length × Width

First find the total area: 44

Half that to find the total left side that is shaded: 22

Find the bottom right side, imagine it is a seperate shape. It would be 4 × 2 = 8. 44 + 8 = 52.

- Educator