how to solve x-2y=8 and x=5-y using substitution method and showing work and please give me the correct answer

Answer:

Step-by-step explanation:

The numbers in the ratio 344 to 111 are written in the wrong order.

Answer:

h = 3

Step-by-step explanation:

Looking at the given image, the height(h) divides the side length of 8 into two equal parts as we see that the height is perpendicular to the side length of 8 m.

Thus, looking at the half triangle of the face where the h is indicated, we can use pythagoras theorem to find h where the hypotenuse is 5 as shown in the diagram since each vertical cross section is an Isosceles triangle. Thus,

h² + (8/2)² = 5²

h² + 4² = 25

h² + 16 = 25

h² = 25 - 16

h² = 9

h = √9

h = 3

Answer:

x is 13.03

Step-by-step explanation:

Start by determining the length of the horizontal side of one of the triangles shown.  The Pythagorean Theorem applies here:

(horizontal side)² + 17² = 19², so that:

(horizontal side)² + 17² = 19² - 17², or 72

Then the length of the horizontal side is +√72, or √36√2, or 6√2.

From the diagram it is obvious that the width of the rectangle, x, can be found by subtracting twice the length of the horizontal side of one of the triangles from 31 (base of the entire figure):

x = 31 - 2(6√2) = 13.03

x is 13.03

Answer:

3.20

Step-by-step explanation:

Answer:

3.24

Step-by-step explanation:

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Answer: r= 5 1/4

Step-by-step explanation:

Answer:150/3.5

Step-by-step explanation:

Step-by-step explanation:

tanA=8/15 and tan B=40/9

tan(A+B)=(tanA+tanB)/1-tanAtanB

(8/15+40/9)/1-(8/15×40/9)

=-672/185

Answer:

Step-by-step explanation:

1) Makes a triangle. 6+8>10 In fact this one makes a right triangle. Try it using a = 6 b = 8 c = 10

2) 6 + 12 should exceed the third side. If these two just equal the third side (as these two do) then no triangle is formed.

3) Same with this one 7 + 1 = 8. No triangle is formed. Just a straight line

4) This one is fine. It makes an isosceles triangle with 2 sides = to 7. Any 2 are bigger than the third.

Answer: 5,2

Step-by-step explanation:

Answer:

The answer will be E(1,-1)

Step-by-step explanation:

I just took the A pex QUIZ!

Answer:

Step-by-step explanation:

The area of the walkway will be 96 square feet. The correct option is C.

The space occupied by any two-dimensional figure in a plane is called the area. The space occupied by the rectangle in a two-dimensional plane is called the area of the rectangle.

Given that the dimensions of the crosswalk are,

19 feet

5 feet

The area of the cross-walk will be calculated as below,

Area = Length x Width

Area = 19 x 5

Area = 96 square feet

Therefore, the area will be equal to 96 square feet.

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Answer:

I believe the answer is D: 10

Step-by-step explanation:

If the other line is 2 segments of 5 and from the center to both lines is the same then x and the other line should be equal

Answer:

At 5:15 PM , they will ring together.

Step-by-step explanation:

We have been given that first bell rings every 15 minutes and second bell rings at every 25 minutes.

In order to find when both will ring together again, we can find the LCM of these two numbers.

15 = 3 × 5

25 = 5 × 5

Therefore, LCM of these two numbers is

LCM = 5 × 5× 3

LCM = 75

Hence, 75 minutes = 75/60 = 5/4 hours

Therefore, at 5:15 PM , they will ring together.

At 5:15 PM the clocks will ring together.

In mathematics, the least common multiple is sometimes referred to as LCM or the lowest common multiple. The smallest number among all the common multiples of the provided numbers is the least common multiple of two or more numbers.

Given:

A clock is set to ring every 15 minutes whereas another clock is set to ring every 25 minutes.

In order to find when both will ring together again, we have to find the LCM of  25 and 15 as

15 = 3 × 5

25 = 5 × 5

LCM (25, 15) = 5 × 5× 3

                     = 75 min

                     = 1 hour 15 minutes.

Hence, At 5:15 PM the clocks will ring together.

Learn more about least common multiple here:

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Answer:

64.5

Step-by-step explanation:

You understand the question, and already have the numbers in order, you're almost there!

So you need to find the median first so you can divide the data set into the upper and lower halves. The median, as you probably know, is the center of the data. What I do for this is list all the numbers out in order, like you've already done, and start crossing them out, one at a time, alternating the sides. I'll show you what I mean. (I'm using underline because there's no strikethrough.)

52, 54, 55, 55, 57, 58, 59, 59, 61, 61, 61, 62, 63, 63, 64, 65, 65, 68, 70, 72

52, 54, 55, 55, 57, 58, 59, 59, 61, 61, 61, 62, 63, 63, 64, 65, 65, 68, 70, 72

52, 54, 55, 55, 57, 58, 59, 59, 61, 61, 61, 62, 63, 63, 64, 65, 65, 68, 70, 72

52, 54, 55, 55, 57, 58, 59, 59, 61, 61, 61, 62, 63, 63, 64, 65, 65, 68, 70, 72

52, 54, 55, 55, 57, 58, 59, 59, 61, 61, 61, 62, 63, 63, 64, 65, 65, 68, 70, 72

...and so on, until you have:

52, 54, 55, 55, 57, 58, 59, 59, 61, 61, 61, 62, 63, 63, 64, 65, 65, 68, 70, 72

Because there's an even number of numbers, the median is the mean of the middle two numbers. Luckily, though, the two numbers in the middle are the same:61. Mean is calculated by adding the terms and dividing by the number of terms. In this case:

(61+61)/2

=61

(You didn't really have to do this mean step, but I'll explain later.)The median is 61. Another way you could have done this is by just counting the number of terms (20) and finding the middle one. Again, since there's no middle one, you'd have to find the mean.

Since you're looking for the third quartile and not the median, you didn't exactly have to do that step. I just wanted to explain how to calculate the median, since you'll have to do it in the next step. All we had to do here was divide the data set into the halves, so we used that visual demonstration by underlining the numbers one at a time. We didn't have to find the mean, we could have split the set down the middle instead.

52, 54, 55, 55, 57, 58, 59, 59, 61, 61, | 61, 62, 63, 63, 64, 65, 65, 68, 70, 72

                                                             ^median/half-way point

We could have also divided the number of terms (20) by 2 (because halves, 2 parts) to get 10 and used the upper 10 values of the set, but I don't know, the crossing out method helps me. Anyway, now we have to look at just the upper 10 values:

61, 62, 63, 63, 64, 65, 65, 68, 70, 72

And you repeat the process! (I'm not going to show the underlining though lol)

There are 10 terms, so the median is between the 5th and the 6th. (10/2=5)

61, 62, 63, 63, 64, 65, 65, 68, 70, 72

This is what I was talking about, there are an even number of values in the upper half of the data set as well, so we have to find the mean of the middle 2: 64 and 65.

 (64+65)/2

=129/2

=64.5

That's your final answer. Hope I could help you!

Answer:

64.5

Step-by-step explanation:

i just answered and got it right

Answer:

(-5,12)

Step-by-step explanation:

use the form (h,k) to find the vertex

Answer:

The equation is;

3(x + 0.75) = 5.88

The original price is $1.21

Step-by-step explanation:

Let the original price per pound be $x

By going up, the new price will be;

(x + 0.75)

3 times this is the new price;

3(x + 0.75) = 5.88

3x + 2.25 = 5.88

3x = 3.63

x = 3.63/3

x = $1.21

Answer:

720 children

Step-by-step explanation:

good day. I think that's the answer hope it helps you.

Answer:

The answer is 261

Step-by-step explanation:

Answer:

sorry if i am wrong but i think it is 35

Step-by-step explanation:

i think you have to add the 37 and 39 to get 76  and subtract 111 to get 35

Answer:

B. 9.1%

Step-by-step explanation:

r= A P −1   = 595 500 −1   ≈0.091 You would need an interest rate of 9.1% to meet your goal.

Answer:

9.1%

Step-by-step explanation:

I confirmed it in grandpoint

Answer:

anything :P

Step-by-step explanation:

Answer:

0and 800m respectively

b

Answer:

b. 0 and 800m respectively

Explanation:

the word "elliptical" means oval or egg-shaped. this means that the displacement of the athlete is 0 since they were running in a circle and stopped where they started, so their end position is not different from their original position.

the distance covered by them is 400m × 2 = 800m.

i hope this helps! :D

Answer:

Do you have a picture or can you explain more?

Step-by-step explanation:

Answer:

Puppies are the cueist

Step-by-step explanation:

Answer:

there is a eye which will make you fall for it .

guess which eye is it

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer: 2/5 x 1/4

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer:

Option B!!!!!

when dividing fractions you just flip the number you will be dividing with which will be 2/5 × 1/4

Anime club: 500 - 30y

Computer club: 150 + 20x

*you could use any letter(variable) you like*

Answer:

Ahoy there, I'm pretty sure that the answer is 15!

Step-by-step explanation:

Answer:

x = 60

y = 50

Explanation:

in a triangle, the sum of all its angles should be 180°. so, to find x, we can subtract the known values from 180° like this:

180° - 50° - 70° = 60°

thus, x is 60.

using the same method, we can find the remaining angle of the other triangle:

180° - 50° - 60° = 70°

now, we know the values of x and the angle next to it. on a straight line, the sum of angles also adds up to 180°. therefore:

180° - 60° - 70° = 50°

i hope this helps! :D

Answer

x^2+3x=270

Explanation

x (x+3) =270

x^2+3x=270

Answer:

25cm

Step-by-step explanation:

each side is 5cm so multiple 5cm times 5cm then you get 25cm

Answer:

25cm^2

Step-by-step explanation:

P=4a

20=4a

a=5

A=a^2

A=5^2

A=25 cm^2