MATHEMATICS HIGH SCHOOL

How do you solve:

x-y=3
x-y=7

Answers

Answer 1
Answer: \left\{\begin{array}{ccc}x-y=3\nx-y=7&/\cdot(-1)\end{array}\right\n\n+\left\{\begin{array}{ccc}x-y=3\n-x+y=-7\end{array}\right\n---------\n.\ \ \ \ \ \ \ \ 0=-4\ -\ FALSE\n\nAnswer:no\ solution;\ x;\ y\in\O
Answer 2
Answer: If you are trying to solve those equations using the equal values method, you would first turn both the equations to equal y. So for x-y=3, you would add y to each side to get x=3+y and then subtract 3 from each side to get x-3=y. When you do the same thing to the equation x=y=7, you get x-7=y. When you plug them together you take away the y's and put an equal sign in between:
                     x-3=x-7  -then you would subtract x from any side and do that to the other side. You get -3=-7 which isn't correct so you would get a "no solution" problem.

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Spencer is designing the interior of a house. The length of one room is twice as long as it's width

Answers

Final answer:

The subject of this question is Mathematics at a High School level. The length of the room is twice the width.

Explanation:

The subject of this question is Mathematics and it is at a High School level.

Step 1: Define the variables

Let the width of the room be represented by w.

Then, the length of the room would be 2 times the width, so it can be represented as 2w.

Step 2: Set up an equation

Since we know that the length is twice the width, we can write the equation:

2w = l

Step 3: Solve for the length

To find the length, we substitute the value of the width into the equation:

2w = 2 * w

l = 2w

So, the length of the room is twice the width.

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L=w+w so W*2=L. i’m gonna need some numbers but that’s the basic equation

X+y=10 , x+z=20 , y+z=24, x+y+z=???
and why??

Answers

+\left\{\begin{array}{ccc}x+y=10\nx+z=20\ny+z=24\end{array}\right\ \ \ \ \ add\ both\ sides\n----------\n2x+2y+2x=54\ \ \ \ |divide\ both\ sides\ by\ 2\n\nx+y+z=27

Evaluate.
9-33.4 +6
9-33.4 +6 =

Answers

The answer is -18.4

9-33.4= -24.4
-24.4+6= -18.4

Hope this helped.

In 2004, it was reported that "the relationship between body mass, M, and standard metabolic rate, B, among living organisms remains controversial. However, in many cases B is approximately proportional to the three-quarters power of M. a.he average mass of an African forest elephant is 4.6 metric tons, and that of a typical mouse is 25 grams. Use part (a) to determine how many times greater the metabolic rate of an elephant is than that of a mouse. Recall that 1 metric ton = 1,000,000 grams.

Answers

The answer is 8884.37 times

In many cases, B is approximately proportional to the three-quarters power of M:
B= M^(3/4)

Elephant:
M1 = 4.6 mt = 4.6 * 1,000,000 g = 4,600,000 g
B1= 4600000^(3/4)=99327.24

Mouse 
M2 = 25 g
B2= 25^(3/4)=11.18

determine how many times greater the metabolic rate of an elephant is than that of a mouse:
B1/B2 = 99327.24 / 11.18 = 8884.37 times

A cereal company used to fill the boxes with 16 ounces of cereal. They have reduced that amount to 14 ounces. The percent decrease is 87.5%. True or false

Answers

Answer:

False

Step-by-step explanation:

Given: A cereal company used to fill the boxes with 16 ounces of cereal. They have reduced that amount to 14 ounces.

Decreased amount = 16 -14 = 2 ounces.

Now let's find the decreased percentage using the following formula.

Decrease percent = (decreased amount)/(original amount) *100

= (2)/(16) *100

= (200)/(16)

= 12.5%

The percentage of decrease is 12.5%.

Therefore, the answer is false
This is a true statement


%87.5 = .875 in decimal form
multiply 16 by 8.75 and it will give you 14

hope this helped

Which expression represents y⁴ - 36 in simplest factored form?A. ( y² + 4)( y² - 9)
B. ( y² + 4)( y - 3)( y + 3)
C. ( y² + 6)( y² - 6)
D. ( y⁴ - 36)( y +1)

Answers

y^4 - 36 = (x^2)^2-6^2 = (y^2+6) (y^2-6)\n \n \n a^2+b^2 =(a+b) (a-b) \n \n\n Answer : \ C. \ ( y^2+ 6)( y^2- 6)
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