3 years ago

How do I work this out

Mathematics

1 answer:

alukav5142 [94]3 years ago

5 0

9514 1404 393

Answer:

no, it is good for 2 weeks (almost 3)

Step-by-step explanation:

The volume of the pool is ...

V = LWH

V = (20 m)(8 m)(1.8 m) = 288 m³

Then the amount of chlorine powder needed for 1 week is ...

(300 g/(50 m³)) × (288 m³) = 1728 g

A box of 5000 g holds enough chlorine for ...

(5000 g)/(1728 g/treatment) = 2.89 treatments

A box of chlorine powder is enough for 2 weeks, not 4.

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Please help me !!!!!!!!!

lidiya [134]

Answer:

f(-2) = 0

f(1) = 12

f(2) = 5

Step-by-step explanation:

f(-2) will lie in the function $f(x) =x^2 - 4$

$\therefore f( - 2) = {( - 2)}^{2} - 4 = 4 - 4 = 0$

f(1) will lie in the function $f(x) =2x^2 +10$

$\therefore f(1) = 2 {(1)}^{2} + 10 = 2 + 10 = 12$

f(2) will lie in the function $f(x) =5$

$\therefore f(2) = 5$

5 0

3 years ago

Sammi went to the store to get 2 party favors for each of her birthday party guests. If she has n guests at her party, which exp

Luden [163]

I’m fairly sure it’s 2N as N is the amount of people. Say there were 100 people that turned up, you would need 200 party favours (obviously because it’s two each) so 2N is 2 x 100 = 200
I’m sorry if it’s wrong! That’s what I would have put :)

7 0

3 years ago

Read 2 more answers

What is the first step when solving the equation below for x?

Aleonysh [2.5K]

Answer: add 0.3 to both sides

Step-by-step explanation:

1) combine like terms

ALWAYS eliminate constant (number with no variable) Before variable

2) when eliminating constant use the opposite sign, ex: x-5, use +5 to eliminate -5

3) eliminate variable by dividing on both sides

Hope this helps!