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3 years ago

HELPPPPPPP PLEASEEEE PLEASEEEEEEE

Mathematics

2 answers:

kondor19780726 [428]3 years ago

8 0

Answer:

1. Exact Form: 71/28 Mixed Number Form: 2 15/28

2. Exact Form: 27/10 Mixed Number Form: 2 7/10

3. Exact Form: 5/6

4. Exact Form: 5/4 Mixed Number Form: 1 1/4

5. Exact Form: 25/12 Mixed Number Form: 2 1/2

Step-by-step explanation:

Anit [1.1K]3 years ago

4 0

What she saiddddd ^ is correct

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Ax+by=(a-b) , bx - ay =(a+b) simultaneous linear equations using cross multiplication

Molodets [167]

Answer:

$x=1\,,\,y=-1$

Step-by-step explanation:

Given: $ax+by=a-b\,,\,bx-ay=a+b$

To solve: the given linear equations

Solution:

Consider the equations:

$A_1x+B_1y+C_1=0\\A_2x+B_2y+C_2=0$

By method of cross multiplication:

$\frac{x}{B_1C_2-B_2C_1}=\frac{y}{C_1A_2-C_2A_1}=\frac{1}{A_1B_2-A_2B_1}$

For equations: $ax+by=a-b\,,\,bx-ay=a+b$

$ax+by-(a-b)=0\\bx-ay-(a+b)=0$

Take $A_1=a\,,\,B_1=b\,,\,C_1=-(a-b)\,,\,A_2=b\,,\,B_2=-a\,,\,C_2=-(a+b)$

So,

$\frac{x}{-b(a+b)-a(a-b)}=\frac{y}{-b(a-b)+a(a+b)}=\frac{1}{-a^2-b^2}\\\frac{x}{-ab-b^2-a^2+ab}=\frac{y}{-ab+b^2+a^2+ab}=\frac{1}{-(a^2+b^2)}\\\frac{x}{-(a^2+b^2)}=\frac{y}{a^2+b^2}=\frac{1}{-(a^2+b^2)}\\\frac{x}{-(a^2+b^2)}=\frac{1}{-(a^2+b^2)}\,,\,\frac{y}{a^2+b^2}=\frac{1}{-(a^2+b^2)}\\x=1\,,\,y=-1$

6 0

3 years ago

2. a=1, If -a=1, then a =

FinnZ [79.3K]

Answer:

a=1,

If -a=1, then a =

a=1

3 0

3 years ago

Read 2 more answers

Write an expression that is equivalent to 21h - 10h + 16 - 9 + 14h + 5 .

Annette [7]

Answer:

25h+12

Step-by-step explanation:

Add the numbers :

21h-10h + 16-9 + 14h+ 5

21h-10h + 12 + 14h

Combine like terms:

25h + 12

3 0

2 years ago

Find the length of a segment in the coordinate plane with endpoints (-1 , 2) and (4 , -6).

Kobotan [32]

Answer:

Step-by-step explanation:

If you graph the points and count the points from one coordinate to the other, you get 7.

4 0

3 years ago

PLEASE HELP, IT WOULD BE MUCH APPRECIATED!! THANK YOU SO MUCH!! Do the graphs above show a relation, a function, both a relation

rewona [7]

Answer:

Well it definitely can't be a function

Step-by-step explanation:

To find out if a graph is a function, you can use the vertical line test. The vertical line test is when you draw a line down the center and if it hits one point, it's a function. But, when it hits more than one point, it's not. In this case, a line would hit more than one point; meaning that they are not functions.

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3 years ago