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ANEK [815]
4 years ago
14

This Is the questions I need help with

Mathematics
1 answer:
Ksenya-84 [330]4 years ago
5 0

Answer:

Step-by-step explanation:

1. no

2. no

3. yes

4. no

5. yes

6. yes

7. yes

8. yes

9. yes

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HELPPP 20 PNTS
enot [183]

Answer:

25.1327cm

Step-by-step explanation:

C= 2πr

C=2π(4)

C=25.13274122

6 0
3 years ago
Simplify into one fraction. -5x/x-3 - 7/x+3
Alexxandr [17]
-5x(x+3)-7(x-3)/x^2-9= -5x^2-15x-7x+21/x^2-9= -5x^2-22x+21/x62-9
4 0
3 years ago
Read 2 more answers
Please hurry please
Charra [1.4K]

Answer:

a = -10

Step-by-step explanation:

solving inequation : a \leq -6.5    so   a = -10   complies

4 0
3 years ago
Read 2 more answers
1. 36(a+b)^2 - 49(a-b(^2
Brums [2.3K]

Answer:

-13a^2 + 170ab - 13b^2.

Step-by-step explanation:

1.  36(a+b)^2 - 49(a-b)^2

This is the difference of 2 squares: a^2 - b^2 = (a + b)(a - b).

36(a+b)^2 - 49(a-b)^2

= (6(a + b) + 7(a - b))(  6(a + b) - 7(a - b))

= (6a  + 7a + 6b - 7b)( 6a - 7a + 6b + 7b)

= (13a - b)(-a + 13b)

If you require the expansion of this it is:

-13a^2 + 170ab - 13b^2.

8 0
3 years ago
What is x=3y+6 converted into y intercept form
Goshia [24]
Okay so to convert x=3y+6 into y intercept form you need to f<span>irst subtract x from both sides of the equation: 
</span>x + 3y = 6 
<span>(x + 3y) -x = 6 - x </span>

<span>3y = -x + 6 <-- (Which is the same thing as 6-x, but with x in front) </span>

<span>Now, to get rid of the 3 on the y side, divide by 3 on both sides of the equation (remember, what you do to one side you MUST do to the other side of the equation as well): 
</span>(3y)/3 = (-x + 6)/3 

<span>y = (-x/3) + 6/3 </span>
<span>or </span>
<span>y = (-1/3)x + 2 (Same thing, don't forget the negative) </span>

<span>y = mx + b </span>
<span>So the slope is (-1/3) and the y-intercept, b, is 2. </span>

<span>Hope you could understand that :3</span>
3 0
4 years ago
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