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DochEvi [55]
3 years ago
14

Kinda need help anything helps

Mathematics
1 answer:
katovenus [111]3 years ago
6 0
First you have to find the slope with the equation y2 - y1 / x2 - x1 , then once you have found the slope (slope = -2) you simply plug it into the point slope formula. y-0 = -2(x-5) solving it algebraically you should arrive at Y=-2x+10. (the 5 and 0 were plugged in are two of the X and Y points of the line which is why we plugged them into the X and Y values of the equation)
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Solve the system with the addition method 7x-6y=11<br>-2×+y=-6​
Anvisha [2.4K]

Step-by-step explanation:

the value of x = 5 and the value of y = 4

6 0
3 years ago
Prove that (x + y)3 - (x-y)3 = 6y(x2+y2) - 4y3​
algol [13]

Answer:

It’s 4x+y3

Step-by-step explanation:

Which equal x+y

7 0
3 years ago
How do you start this and find the weight of each shape? I do not remember doing this in class.
suter [353]
Let's say   make the shapes, some variable name

say   

⛁    ⚪     ◽    ▯
a     b      c     d

so.. if take those are the shapes provided

then we can take a look at the first set and we can say that

2a + b + c = 20

a + 4d + b = 19

a + c = 9

3c + d + a = 19 

thus     \bf \begin{cases}&#10;2a + b + c = 20\\&#10;a + 4d + b = 19\\&#10;a + c = 9\\&#10;3c + d + a = 19 &#10;\end{cases}\\\\&#10;-----------------------------\\\\&#10;a+c=9\implies \boxed{c}=9-a\qquad thus&#10;\\\\\\&#10;2a+b+\boxed{9-a}=20\implies \underline{b}=11-a\impliedby thus&#10;\\\\\\&#10;a+4d+\underline{11-a}=19\implies d=\cfrac{8}{4}\implies d=2\\\\&#10;-----------------------------\\\\&#10;then\qquad 3\left(\boxed{9-a } \right)+\boxed{2}+a=19\implies 27-3a+2+a=19&#10;\\\\\\&#10;10=2a\implies 5=a

and surely you can find the other two

4 0
3 years ago
Which equations are true? Choose all answers that apply: Choose all answers that apply: (Choice A) A -x +0+(- x) = 0−x+0+(−x)=0m
lora16 [44]

Answer:

(B)-x-(-x) =0

Step-by-step explanation:

<u>Option A</u>

Our equation is: -x +0+(- x) = 0

Left Hand Side:

-x +0+(- x) = -x-x=-2x

($Left Hand Side) $-2x\neq 0$ (Right Hand Side)

<u>Option B</u>

Our equation is: -x-(-x) =0

Left Hand Side:

-x-(-x) =-x+x=0

($Left Hand Side) 0 = 0 (Right Hand Side)

Therefore, the equation in Option B is true.

3 0
4 years ago
Mary can do a job in 80 minutes, Working with Jané, both can do the job in 30
LenKa [72]

Answer:

see below

Step-by-step explanation:

The equation to determine the work time is

1/a+1/b = 1/c  where a and b are the times alone and c is the time together

1/80 + 1/30 = 1/c

Multiply by the least common denominator to clear the fractions, which is 240c

240c(1/80 + 1/30 = 1/c)

3c+8c = 240

11c = 240

Divide by 11

11c/11 =240/11

c = 240/11 minutes

c=21.81818

Approximately 22 minutes

3 0
3 years ago
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