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9966 [12]
2 years ago
11

A lifeguard fills a pool with water at a constant rate. After 1/2 hour, 1/3 of the pool is filled.

Mathematics
2 answers:
erma4kov [3.2K]2 years ago
8 0

Answer:

D

Step-by-step explanation:

1/2 hour -> 1/3 pool

multiply this by 2

1 hour -> 2/3 pool

so D 2/3 pool

Dominik [7]2 years ago
4 0

1/2 hour...................1/3

1 hour (1/2 x 2).......1/3x2

so = 2/3 of the pool is filled per hour

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2
Burka [1]

Answer:

2x^2+13

Step-by-step explanation:

Given

(-5x^2-2x+4)+(8x^2-x-1)-(x+2)(x-5)

Required

Simplify

Expand brackets

(-5x^2-2x+4)+(8x^2-x-1)-(x^2-5x+2x-10)

(-5x^2-2x+4)+(8x^2-x-1)-(x^2-3x-10)

Open all brackets

-5x^2-2x+4+8x^2-x-1-x^2+3x+10

Collect Like Terms

-5x^2+8x^2-x^2-2x-x+3x+4-1+10

2x^2+13

<em>Hence, the polynomial simplifies to </em>2x^2+13<em> and it has a degree of 2</em>

5 0
3 years ago
6x-2=7x+9 find x plz help
steposvetlana [31]

Answer:

x=-11

Step-by-step explanation:

6x-2=7x+9

Add 2 to both sides:

6x-2+2=7x+9+2

6x=7x+11

Subtract 7x from both sides:

6x-7x=7x+11-7x

-x=11

Divide both sides by -1:

\frac{-x}{-1}=\frac{11}{-1}

x=-11

7 0
3 years ago
Read 2 more answers
If f(x)=2x-5, find <br><br> a. f(4)<br> b. f(-3)
Vladimir [108]

Replace x in the given equation with each value:

a. f(4) = 2(4) -5

= 8-5

=3

b. (f-3) = 2(-3) - 5

= -6 -5

= -11

8 0
3 years ago
How do I get to the end dragon i don't know where the portal is will give 50 points​
zmey [24]

Answer:

?

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Solve for x: 3 − (2x − 5) &lt; −4(x + 2)
Firdavs [7]

Answer:

A. x < -8 (first option)

Step-by-step explanation:

3 - (2x - 5) <  - 4(x + 2)

3 - 2x + 5 <  - 4x - 8

8 - 2x <  - 4x - 8

- 2x + 4x <  - 8 - 8

2x <  - 16

\boxed{\green{x <  - 8}}

6 0
3 years ago
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