Mathematics High School

The sum of John and Dave's ages is 63. Dave is is six years less then twice Johns
age. How old is Dave?

Answers

Answer 1

Answer:

The present age of Dave is 40 years

Step-by-step explanation:

Let the present age of Johns be x

We are given that Dave is six years less then twice Johns  age.

Dave's present age = 2x-6

We are also given that The sum of John and Dave's ages is 63.

So, [tex]x+2x-6=63[/tex]

[tex]3x-6=63[/tex]

[tex]3x=63+6[/tex]

[tex]3x=69[/tex]

[tex]x=\frac{69}{3}[/tex]

[tex]x=23[/tex]

Dave's present age = 2x-6=2(23)-6=40

Hence The present age of Dave is 40 years

Related Questions

Solve -319 + x) = 33

Answers

Answer:

x = 352

Step-by-step explanation:

Move all terms not containing  x  to the right side of the equation.

Answer:

x=352

Step-by-step explanation:

-319+x=33

+319    +319

x=352

38% of the 1200 Robinson students are 7" graders. How many Robinson
students are 7 graders?

Answers

For percentages, we write the number before the % sign as a decimal out of 1. So our percentage would actually be 0.38

To find what percent of Robinson students are 7th graders, we simply multiply 0.38 by 1200 which gives us 456

The answer is 456

does anyone know the answer to this?​

Answers

Answer:

it might be 48 seeing that 1/4 of df is dz so add zf to it and df should equal 48

Step-by-step explanation:

Kayley needs to find the area of a circle. Which process should she use? She should multiply the diameter by 2 and then multiply the result by 3.14. She should multiply the radius by 2 and then multiply the result by 3.14. She should square the diameter and then multiply the result by 3.14. She should square the radius and then multiply the result by 3.14.

Answers

Answer:

The correct answer is the last one:

"She should square the radius and then multiply the result by 3.14"

Step-by-step explanation:

Answer:

The answer is D which says she should square the radius and then multiply the result by 3.14 or pi

Step-by-step explanation:

Took the review, and got 100 on Edge2021 <3

Hope this helped you c:

solve the literal equation for x. 2y-18x= -26

Answers

Answer:x=y+13/9

Step-by-step explanation:

Answer:

262y/18

Step-by-step explanation:

Ali bought 8 apples for a total of $14.32. How much
did each apple cost?

Answers

Each apple costs 1$ and 78 cents

given m ll n find the value of x

Answers

Answer:

63°

Step-by-step explanation:

opposite angle

63°

Which value of x makes the equation
0.25(x + 20) = 0.1(x + 70) + 0.05x true?
A.0.2
B.25
C.20
D.2

Answers

Answer:

C. 20

Step-by-step explanation:

20 is the only value that makes x true. Basically x = 20.

We find this by doing the "good ol' Isolate the variable by dividing each side by factors that don't contain the variable."

Hope this helps and have a nice day!

What is the length of the line?
a. 6.5
b. 7
c. square root of 35
d. square root of 37

Answers

Answer :A


Explanation

Answer: the correct anwser is D square root of 37

Step-by-step explanation:

SOLVE ASAP WILL GIVE BRAINLIEST 100 POINTS

Answers

Answer:

I believe thats 8 to the power of 7

Step-by-step explanation:

Answer:

i clicked your link adn it looks like 8^7 or 8 to the 7th power which would be 2,097,152

Step-by-step explanation:

Determine whether the statement is true or false. Justify your answers.

The graph of y = f(-x) is a reflection of the graph of y = f(x) in the x-axis.

The graph of y = -f(x) is a reflection of the graph of y = f(x) in the y-axis.

Answers

Answer:

The graph of y = f(-x) is a reflection of the graph of y = f(x) in the x-axis. ⇒ False

The graph of y = -f(x) is a reflection of the graph of y = f(x) in the y-axis. ⇒ False

Step-by-step explanation:

Let us explain the reflection about the axes

If a graph is reflected about the x-axis, then the y-coordinates of all points on it will opposite in sign

Ex: if a point (2, -3) is on the graph of f(x), and f(x) is reflected about the x-axis, then the point will change to (2, 3)

That means reflection about the x-axis change the sign of yy = f(x) → reflection about x-axis → y = -f(x)

If a graph is reflected about the y-axis, then the x-coordinates of all points on it will opposite in sign

Ex: if a point (-2, -5) is on the graph of f(x), and f(x) is reflected about the y-axis, then the point will change to (2, -5)

That means reflection about the y-axis change the sign of xy = f(x) → reflection about y-axis → y = f(-x)

Now let us answer our question

The graph of y = f(-x) is a reflection of the graph of y = f(x) in the x-axis.

It is False because reflection about x-axis change sign of y

The graph of y = -f(x) is a reflection of the graph of y = f(x) in the x-axis

The graph of y = -f(x) is a reflection of the graph of y = f(x) in the y-axis.

It is False because reflection about y-axis change sign of x

The graph of y = f(-x) is a reflection of the graph of y = f(x) in the y-axis

What is the LCM (12, 15)?

Answers

Answer:

60

Step-by-step explanation:

12x5=60 and 15x4=60 so 60 is the LCM

how do you do 32x−4=14x+12

Answers

Answer:

8/9

Step-by-step explanation:

you will add 4 to both sides and minus 14x from both sides making it 18x= 16 divided 18 from both sides with will be 16/18 but simplify it and it will be 8/9

Answer:

8

9

Step-by-step explanation:

What two numbers multiply get 45 and added get -18?

Answers

Answer:

-3 and -15

Step-by-step explanation:

-3*-15=45

Answer: When 45 is added to -18 it’s written as 45-18=27.

Tyrell went to the park to go jogging. The beginning of the running path has an elevation of -2 feet. The highest elevation on the jogging path is 14 feet. What is the difference in elevation between the highest point and the beginning of the path? Make sure you write down the highest point first then take away the negative two.

Answers

Answer:

16 ft

Step-by-step explanation:

Difference in a math question always signifies that we are subtracting. When finding the difference between an elevation you need to subtract the highest point first from the lowest point or starting point. Therefore in this scenario, we subtract 14 feet which is the highest point from the starting point which is -2 ft. Since the starting point is at a negative elevation, the negatives will cancel out and becomes a positive.

14 - (-2) = x ... negative cancel out and become a positive or addition

14 + 2 = x

16 ft = x

Finally, we can see that the difference between these two points is 16 ft.

i need help with this geometry

Answers

Answer:

2.

Step-by-step explanation:

supplementary= 180 degrees.

Step-by-step Explanation: If two parallel lines are cut by a transversal, then same-side interior angles are supplementary or the sum of their measures is 180 degrees.

Notice that <3 and <5 are same-side interior angles because they lie on

the same side of the transversal and on the interior of lines l and m.

Notice that same-side interior angles make a C shape.

what is 1000x57 to the second power?

Answers

Answer:

57*57*1000= 3249000

(>'-'<)    

Dan mixed two parts of milk and three parts of syrup to make a drink how many parts of milk did Dan mix with each part of syrup

Answers

Answer:

0.66 parts of milf with 1 part of syrup

Step-by-step explanation:

Using the table created in part a determine how long it will take to complete the calls of Emma and Jackson work together

Answers

Answer: look at the image. hope this helps

Step-by-step explanation:

Carlos works at a bicycle shop.
He earns $8 for each bicycle tire he repairs and $45 each week for cleaning the shop.
Which expression shows how much Carlos earns each week if

Answers

Answer: 360

Step-by-step explanation: Carlos earns 8x45

What is 5+5 and how do i use my fingers to get it?

Answers

10


Each hand has 5 fingers, so hold up both of your hands and count them up and you’ll get 10 fingers in total!

Answer:

5+5=10

Step-by-step explanation:

If you have 5 fingers on 2 hands, you put them together and count 1 by 1. if not then since there are 2 5s, multiply 5 and 2, hten tell you're teavher you dont got no fingers

Find the midpoint of the segment with the following endpoints.
(4, -10) and (10,0)
literally anyone know this ?

Answers

Ok the answer is (7,-5)

Peyton go shopping she finds T-shirts one +24.97 and the other cost 13.75 she needs to know if she has enough money to buy both shirts using mental math she round $24.97-$25 and exit 213.75 to get 38.75 how does Peyton need to compensate find the exact all of the Two shirts

Answers

Answer: Subtract 0.03.

Step-by-step explanation:

given data:

Cost of T-shirt one = $24.97.

cost of T-shirt two = $13.75.

peyton rounded the cost of the first T-shirt up to $25 ( by adding $0.03 ). The addeded the cost of the second shift to arrive at a total cost of $38.75 for both.

to find the exact amount of the two shirts, peyton needs to subtract 0.03 from the total amount.

= $38.75 – 0.03

= $38.72

The original amount of both T-shirt is $38.72.

What is the slope of the line y=3?

Answers

Answer:

The slope of the line is zero.

Step-by-step explanation:

The slope is zero. This is a perfectly horizontal line passing through y=−3 .

Simplify the problem bellow, please. The correct answer will receive brainliest and follow. I won't tolerate idiots

Answers

Answer: 325

Step-by-step explanation:

I wrote down the steps but thats the answer it took me a while to complete that was some difficult math lol.

Does anyone know if this is a function ?

Answers

Answer:

Yes, it is a function

Step-by-step explanation:

This is a function since each x value, the number on the left in the paretheses only has one y value.

If any x had more than one y value, it wouldn't be a function.

Hope this helps:)

[tex]\frac{1}{x} *x^2+5x[/tex]

Answers

The answer is 6x if you simplify the equation

A spaceship on a journey between planets would have to recycle as much air and water as possible. Suppose the crew on such a spaceship used 32.99 L of water one day and recycled all but 0.24 L. About what percent of the water was​ lost?

Answers

You take the percent that was lost (0.24) and divide by the total used (32.99) and you get a decimal of 0.007274 and the percentage of that is 0.7274%

Name the plane in 2 ways please! simple and quick :) ​

Answers

Answer:

Plane A or Plane MVN

Step-by-step explanation:

the next model of the car will cost 14.4% more than the current model. the current model costs 39,000 how much will the price increase in dollars? what will be the price of the next model​

Answers

Answer:

$ 44616

Step-by-step explanation:

Hi there !

What will be the price of the next model​ ?

$39000 + $39000×14.4% =

= $39000 + $39000×0.144

= $39000(1 + 0.144)

= $39000×1.144

= $ 44616

Good luck !

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