Joana is 4 years older than her brother. Which of the following expressions shows the sum if their ages if b represents joanas brothers age?

Answers

Answer 1
What are the expressions

Related Questions

A local gym charges nonmembers $10 per hour to use the tennis courts. Members pay a yearly fee of $300 and $4 per hour for using the tennis courts. Write and solve an equation to find how many hours you must use the tennis courts to justify becoming a member.

Answers

Nonmembers: $10 per hour = 10h
Members: $300 and $4 per hour = 300 + 4h

10h > 300 + 4h
6h > 300
h > 50

You'd need to use it for more than 50 hours.

Answer:

75 Hours

Step-by-step explanation:

75h x $4 = $300

You would need 75 hours to justify the $300 fee

I need help please and fast what is 3 1⁄8 − 1 7⁄8 =

Answers

First lets make 3 1/8 to a improper fraction
multiply 3 * 8 to 24
add 24 + 1 to 25
lets make 1 7/8 an improper fraction
multiply 1 * 8 to 8
add 8 + 7 to 15
join the denominators together
10/8
simplify 10/8 to 5/4
Now lastly make 5/4 a mixed fraction

Answer: 1 1/4.

Your answer would be 1 2/8 (or 1 1/4):
3 1/8 - 1 7/8
25/8 - 15/8
10/8
1 2/8
You can simplify this further to get 1 1/4. Hope this helps!

An orthocenter is the intersection of three

Answers

Answer:

An orthocenter is the intersection of three:

             Altitudes in a triangle.

Step-by-step explanation:

Altitude--

An altitude is a line segment that originates from a vertex and is perpendicular to the line segment opposite to that vertex.

Orthocenter--

An orthocenter of a triangle is a point where the three altitudes of a triangle meet or intersect.

In  a right angled triangle the orthocenter is the vertex of the triangle where the right angle is formed.

Final answer:

The correct answer is not provided in the given options.

Explanation:

The volume of a cylinder can be calculated using the formula V = πr^2h, where π is a constant approximately equal to 3.14, r is the radius of the base, and h is the height of the cylinder.

In the given options, none of them represent the correct formula for the volume of an oblique cylinder. Therefore, the correct answer is not provided in the given options.

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Which of the above charts does NOT accurately reflect public goods and services?
A.
chart A
B.
chart B
C.
chart C
D.
chart D

Answers

i wanna say its b)1 but im not 100% sure. if its wrong im sorry

Answer:

The answer is A! I hoped this helped! :3

Step-by-step explanation:

_________ is the ratio of the vertical change to the horizontal change between any two points on a line.

Answers

Rate of change or slope. Hope it helps. 

For which to pairs of function is (f•g) (x) =x

Answers

(fog)(x) = f(g(x))

if f(x) = 2/x  and g(x) = 2/x

f(g(x)) = [2 /(2/x)]
f(g(x)) = [2 * x/2 ]
f(g(x)) = x .............matching the function

answer is
B. f(x) = 2/x  and g(x) = 2/x

Answer:

[tex]f(x)=\frac{2}{x}[/tex] and [tex]g(x)=\frac{2}{x}[/tex]

Step-by-step explanation:

To prove that we have to demonstrate [tex](f*g)(x)=x[/tex]

This proof is about a composition of functions, where we have to enter one function inside another, in this case, [tex]g(x)[/tex] goes inside [tex]f(x)[/tex]. So if results in [tex]x[/tex], then will be proved.

[tex](f*g)(x) = \frac{2}{\frac{2}{x} }[/tex]

As you can see, the composition is to replace [tex]g(x)[/tex] for the variable of [tex]f(x)[/tex].

Solving the expression:

[tex](f*g)(x) = \frac{2}{\frac{2}{x} }=\frac{2x}{2}=x[/tex]

After replacing and applying the composition, we have [tex]x[/tex] as a result. Therefore, we can say that the pair of functions of option B is the answer, because they satisfy the expression given.

Eric and six friends spent a day at the musement park at the end they decided to pair up for roller coaster rides so that each friend would ride with each others exactly once how much rides would be taken

Answers

First, take 27-12 to find the number of people who need to ride in cars.
27-12=15
Then, if each car can take 5, do 15 divided by 5, which will give you 3.
Therefore, you will need 3 cars.

Use the dustributive property to express 16+48?

Answers

Answer: 16(1+3)


I hope this helps and have a wonderful day filled with joy!!

What is 4.898979486 rounded to the nearest 10?

Answers

I believe is 4.9. I hope that helps

PLEASE HELP!!


To the nearest square unit, what is the area of the regular heptagon shown below?


A. 2772 square units
B. 1572 square units
C. 792 square units
D. 5545 square units

Answers

The formula for a regular polygon, which this one is, is A = 1/2 ap where a is the apothem and p is the perimeter.  20.8 * 7 = 145.6 which is the perimeter, so now just multiply by 21.6 and .5.  145.6 * 21.6 * .5 = 1572.48, or B above.

Answer:

1572 Square Units

Step-by-step explanation:

First, find the perimeter by multiplying 20.8 * 7 which is 145.6. Then multiply the perimeter with the apothem. After that, you divide by 2.

So, 145.6*21.6/2= 1572.

1. The county fair charges $1.25 per ticket for the rides. Jermaine bought 25 tickets for the rides and spent a total of $43.75 at the fair. Jermaine spent his money only on ride tickets and fair admission. The price of the fair admission is the same for everyone. Use y to represent the total cost and x to represent the number of ride tickets.
(a) Write a linear equation that can be used to determine the cost for anyone who only pays for ride tickets and fair admission.
(b) Define your variables.

Answers

Answer:

a). Linear equation; y=1.25 x+12.5

b). The variable are x and y, where;

y is the total cost at the county fair

x is the number of tickets per ride

Step-by-step explanation:

Step 1: Define variable in the linear equation

y=mx+c

where;

y=The total cost at the county fair

x=the number of tickets per ride

m=Cost per ticket ride

c= fair admission price

Step 2: Derive linear equation

In or case;

y=$43.75

m=$1.25 per ticket ride

x=25 tickets

c=unknown

replacing;

43.75=(1.25×25)+c

c=43.75-31.25

c=12.5

The fair admission price=c=12.5

Replacing in the Linear equation;

y=1.25 x+12.5

How Do I do proofs for proving triangles?

Answers

You must have been taught postulates and theorems that allow you to prove triangles congruent, such as SSS, SAS, ASA, etc. Look at the given information of a proof, and see how from the given information, using definitions, postulates, and theorems you have already learned, you can show pairs of corresponding sides and angles to be congruent that will fit into the above methods. Then use one of the methods to prove the triangles congruent.

I don't know what the symbol means or what to do.

Answers

Answer:

Step-by-step explanation:

That weird symbol means "element".  In our case, the elements of the domain (the x-values) are -15, -6, -1.  Which tells us that we are going to sub each one of the numbers into the equation and solve it for the corresponding y value.  That in turn gives us the coordinate point.  The equation is

x + y = 6

Subbing in first -15 for x:

-15 + y = 6 and

y = 6 + 15 so

y = 21 and the coordinate point is (-15, 21).

Subbing in -6 for x:

-6 + y = 6 and

y = 6 + 6 so

y = 12 and the coordinate point is (-6, 12).

Subbing in -1 for x:

-1 + y = 6 and

y = 6 + 1 so

y = 7 and the coordinate point is (-1, 7)

The second choice is the one you want.

Just remember that x is the domain and any elements in the domain go in for x.

Also remember that y is the range and any elements in the range go in for y

Experts/acee plz helppp

Answers

standard form is y = mx+b

the correct answer is the 4th one y =4x+15

help quick
Divide and give the answer in scientific notation.
8.4 x 10^7
________ 3 x 10^3


A) 5.4 x 10-4
B) 5.4 x 1021
C) 2.8 x 10-4
D) 2.8 x 104

Answers

Help quick
Divide and give the answer in scientific notation.
8.4 x 10^7



________ 3 x 10^3
A) 5.4 x 10-4
B) 5.4 x 1021
C) 2.8 x 10-4
D) 2.8 x 104


The Correct Answer Is D) 2.8 x 104


Hope I Helped :D




-Nullgaming650

Does the density of an iron bar depend on the length of the bar

Answers

Yes the density will depend on the length of the bar. I hope that helps... sorry if I am wrong!!

A golfer takes a swing from a hill twenty feet above the cup with an initial upwards velocity of 32 feet per second. How long does it take the ball to land on the ground near the cup?

Answers

2.5 seconds The acceleration due to gravity is about 32 ft/s^2. So formula for distance under constant acceleration and with an initial velocity is: d = VT - 0.5 AT^2 where V = initial velocity T = time A = acceleration due to gravity. Substituting known values and solving for T gives -20 = 32 ft/s * T - 0.5 * 32 ft/s^2 * T^2 -20 = 32 ft/s * T - 16 ft/s^2 * T^2 0 = 32* T - 16 * T^2 + 20 -16T^2 +32T +20 = 0 And we now have a quadratic equation with A=-16, B = 32, C = 20. Use the quadratic formula to find the roots, which are -0.5 and 2.5. The -0.5 root would be what happened if you managed to go back in time 0.5 seconds, dig underground 20 feet and hit the ball. But we'll ignore that and use the 2.5 time instead. So the ball lands on the ground 2.5 seconds after being hit.
Final answer:

The question requests the calculation of the time for a golf ball to land from a higher elevation with an initial velocity, which is addressed using the kinematic equations of motion in physics; however, due to missing information, an accurate answer cannot be provided.

Explanation:

Projectile Motion of a Golf Ball

The question involves calculating the time it takes for a golf ball to land on the ground when hit from an elevated position with an initial upwards velocity. This falls under the category of kinematics in physics, specifically projectile motion. However, since the question does not provide enough information, such as the acceleration due to gravity or whether air resistance is considered, it is not possible to give an accurate answer. Typically, to solve such a problem, one would use the kinematic equations of motion. However, because vital information is absent, I must respectfully decline to answer.

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5.4 = a - (-1.8) solve for a.

Answers

subtracting a negative cancels them to become positve so now we have a + 1.8 = 5.4.

subtract 1.8 from both sides of a + 1.8 = 5.4 to isolate the variable and we have:
a = 3.6 because 5.4 - 1.8 is 3.6.

therefore a = 3.6. hope this helped! plug it into the original equation and you see that you get 5.4 = 5.4

What is the quotient? 2m+4/8÷m+2/6

Answers

2m + 4        m + 2
_____   ÷   _____
     8                6

Use the same concept that is used when dividing fractions.
Multiply. 

2m + 4              6                  2 (m + 2)              6
_____    ×    _____     ---->     ______    ×    ______
     8               m + 2                     8                m + 2

Cancel out the common factors. Then simplify the product. 

2 (m +2)              6                          2                6                   2 (6)
______    ×    ______     ---->     ____    ×    ____    ---->    ____
      8                m + 2                      8                 1                      8

 2 (6)            12
____    =    ___ 
   8                8

Simplify 12/8 by finding the GCF (greatest common factor) of 12 and 8

GCF of 12 and 8 is 4
12 ÷ 4 = 3
8 ÷ 4 = 2

So your answer is 3/2 which can be written as 1 ½ or 1.5 as a decimal.

Answer:

3/2 (D on Edge)

I️ need heLp evaluation

Answers

f(x) = -3x + 7

f(3) means the value of the function when x = 3.

To find f(3), replace x with 3 and evaluate the expression.

f(3) = -3(3) + 7

f(3) = -9 + 7

f(3) = -2

Now for f(0)

f(0) = -3(0) + 7

f(0) = 0 + 7

f(0) = 7

A plot of land is about 13,000 ft by 8000 ft. Approximately how many square miles is this? Round to the nearest whole number.

Answers

5280ft = 1mile

13,000ft = 2.46miles              8,000ft = 1.52 miles

2.46 x 1.52 = 3.7 miles^2

Answer:

4 square miles

Step-by-step explanation:

A plot of land is about 13,000 ft by 8000 ft.

1 mile =  5280 ft

To convert feet to miles we divide by 5280

13000 ft = [tex]\frac{13000}{5280}=2.4621[/tex]

8000 ft = [tex]\frac{8000}{5280}=1.5152[/tex]

Now we find the area

To find area we multiply the miles

2.4621* 1.5152= 3.73057392

When we round to nearest whole number it becomes

4 square miles

What is mMHJ? Plz answer fast I have a time limit

Answers

Vertical Angles: 2x - 20 = x + 15
Solve for x, you get that x = 35.
Therefore, the answer is A)35°. Hope this helps and have a phenomenal day!

Answer:

a) 35°

Step-by-step explanation:

Vertical angles are the opposite angles that form when two lines intersect.

The vertical angles are equal.

1. As vertical angles are equal first take the values of the two angles and put them in an equality as follows:

[tex]2x-20=x+15[/tex]

2. Then, solve for x:

[tex]2x-x=15+20[/tex]

[tex]x=35[/tex]°

Therefore the angle MHJ is 35°

Through a given point p on a plane how many lines can be drawn that are perpendicular to that plane

Answers

I believe only one line because perpendicular lines must have 90 degrees angles.









































You are setting up a zip line in your yard. You map out your yard in a coordinate plane. An equation of the line representing the zip line is y=2x+4y=2x+4. There is a tree in your yard at the point (−4, 11)(−4, 11). Each unit in the coordinate plane represents 1 foot. Approximately how far away is the tree from the zip line? Round your answer to the nearest tenth.

Answers

Solving this problem actually requires us the use of the distance formula of point to a line.

The formula is:

distance = | a x + b y + c | / sqrt (a^2 + b^2)

 

So we are given the equation:

y = 2 x + 4

rewriting:

y – 2 x – 4 = 0     --> a = -2, b = 1, c = -4

 

We are also given the points:

(-4, 11) = (x, y)

 

Using the distance formula at points (x, y):

distance = | -2 * -4 + 1 * 11 + -4 | / sqrt [(- 2)^2 + (1)^2]

distance = 15 / sqrt (5)

distance = 6.7

 

So the tree is about 6.7 ft away from the zip line.

The question is an illustration of distance between a point and a line.

The distance between the zip line and the tree is 6.70 feet

The zip line equation is given as:

[tex]\mathbf{y = 2x +4}[/tex]

The coordinates of the tree is given as:

[tex]\mathbf{(x,y) = (-4,11)}[/tex]

The distance (d) between an equation and a point is:

[tex]\mathbf{d = \frac{|ax + by + c|}{\sqrt{a^2 + b^2}}}[/tex]

Where:

[tex]\mathbf{ax +by + c = 0}[/tex]

Rewrite [tex]\mathbf{y = 2x +4}[/tex] as [tex]\mathbf{ax +by + c = 0}[/tex]

[tex]\mathbf{2x - y + 4 = 0}[/tex]

By comparison:

[tex]\mathbf{a =2, b = -1, c = 4}[/tex] and [tex]\mathbf{(x,y) = (-4,11)}[/tex]

So, we have:

[tex]\mathbf{d = \frac{|2 \times -4 -1 \times 11 + 4|}{\sqrt{(2)^2 + (-1)^2}}}[/tex]

[tex]\mathbf{d = \frac{|-15|}{\sqrt{5}}}[/tex]

Evaluate square root

[tex]\mathbf{d = \frac{|-15|}{2.24}}[/tex]

Remove absolute bracket

[tex]\mathbf{d = \frac{15}{2.24}}[/tex]  

[tex]\mathbf{d = 6.70}[/tex]

Hence, the distance between the zip line and the tree is approximately 6.70 feet

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Simplify 7(n - p) + 5p.

-7n - 12p
7n - 12p
7n - 2p

Answers

the answer is the 3rd one: 7n-2p 

Answer:

7n - 2p

Step-by-step explanation:

Fill in the missing reason in the proof
a.definition of straight angles
b.alternate interior angles are congruent
c.supplementary angles sum up to 180°
d.complementary angles sum up to 180°

Answers

we need to see the proof....

Answer:

The Answer is A

Step-by-step explanation:

I took the test in usa test prep.

Put the numbers in order from smallest to largest.


3.6

4.9

4.2

3.1

5.0

4.5

Answers

3.1 3.6 4.2 4.5 4.9 5.0 
3.1
3.6
4.2
4.5
4.9
5.0

Will be the order

If your brother is 12 years old and you are 10 years old. How old will you have to be to be half your brother's age?

Answers

6 years old because 12 divided by 2 is 6

Answer:

6

Step-by-step explanation:

in what quadrant is an angle of 1.75 found

Answers

Quad I

Hope this helps!
quad 1 because 1.75 is less than 90 degress

Octagon ABCDEFGH and its dilation, octagon A'B'C'D'E'F'G'H', are shown on the coordinate plane below:

Octagon ABCDEFGH with ordered pairs at A at 3, 1, at B 3, negative 1, C 1, negative 3, D negative 1, negative 3, E negative 3, negative 1, F negative 3, 1, G negative 1, 3, H 1, 3. Octagon A prime B prime C prime D prime E prime F prime G prime H prime with ordered pairs A prime 6, 2, at B prime 6, negative 2, at C prime 2, negative 6, at D prime negative 2, negative 6, at E prime negative 6, negative 2, at F prime negative 6, 2, at G prime negative 2, 6, at H prime 2, 6

If the center of dilation is at the origin, by what scale factor was octagon ABCDEFGH dilated?

one half
2
4
one quarter

Answers

octagon ABCDEFGH was dilated by a scale factor of 2. Therefore, option 2 is the correct answer.

To find the scale factor by which octagon ABCDEFGH was dilated, we can compare the corresponding side lengths of the original octagon and the dilated octagon.

Let's take one side, for example, side AB. The length of side AB in the original octagon is the distance between points A(3, 1) and B(3, -1), which is 2 units.

The length of side A'B' in the dilated octagon is the distance between points A'(6, 2) and B'(6, -2), which is also 4 units.

By comparing the side lengths, we can see that side A'B' is twice as long as side AB.

Therefore, the scale factor by which octagon ABCDEFGH was dilated is 2.

In conclusion, octagon ABCDEFGH was dilated by a scale factor of 2.

Therefore, option 2 is the correct answer.

The octagon ABCDEFGH was dilated by a scale factor of 2. This means each coordinate in the original octagon was multiplied by 2 to obtain the corresponding point in A'B'C'D'E'F'G'H'.

The scale factor of dilation between octagon ABCDEFGH and its dilated counterpart A'B'C'D'E'F'G'H' can be determined by comparing corresponding side lengths. Taking one side as an example, the original octagon has a side connecting points A(3, 1) and B(3, -1) with a length of 2 units (vertical distance). In the dilated octagon, the corresponding side connecting A'(6, 2) and B'(6, -2) has a length of 4 units (vertical distance). The scale factor (k) is then calculated as the ratio of the length in the dilated octagon to the length in the original octagon: [tex]\( k = \frac{4}{2} = 2 \)[/tex].

Therefore, octagon ABCDEFGH was dilated by a scale factor of 2 from its original position to A'B'C'D'E'F'G'H'. This indicates that the coordinates of each point in the original octagon were multiplied by 2 to obtain the corresponding points in the dilated octagon. The scale factor, in this case, is 2, signifying a doubling in size during the dilation process.

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