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Morgarella [4.7K]

2 years ago

14

What is the value of b if 9+b=-8

2 answers:

Liono4ka [1.6K]2 years ago

8 0

Subtract 9 from both sides of the '=' sign

9 - 9 + b = -8 -9

b = -17 That's the answer.

lubasha [3.4K]2 years ago

7 0

To solve for b, we must move all constants to the right side of he equation. We will do this by subtracting 9 from both sides.
9-9+b=-8-9
B=-17

-17 is your final answer.

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Which property explains why these two expressions are equal?

ratelena [41]

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With this, the parenthesis have nothing multiplying into it, so we can drop the parenthesis to get:

W+23+5=W+23+5
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The radius of a circle is 8 kilometers. What is the area?

Scorpion4ik [409]

Answer:

Area of the circle= $200.96 km^2$

Step-by-step explanation:

Area of a circle= $\pi *r*r$

For radius(r)=8 km

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As:

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-2x^2+4x-1 from 6x^2+3x-9

kirza4 [7]

Answer:

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Step-by-step explanation:

We want to subtract

$- 2 {x}^{2} + 4x - 1$

from

$6 {x}^{2} + 3x - 9$

We set up the subtracttion problem to get:

$6 {x}^{2} + 3x - 9 - ( - 2 {x}^{2} + 4x - 1)$

We expand the parenthesis to get:

$6 {x}^{2} + 3x - 9 + 2 {x}^{2} - 4x + 1$

Group similar terms:

$6 {x}^{2} + 2 {x}^{2} + 3x- 4x + 1 - 9$

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