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7nadin3 [17]
3 years ago
10

PLS HELP ME I DONT HAVE MUCH TIME

Mathematics
1 answer:
Rufina [12.5K]3 years ago
3 0

Answer:

- 75 and - 28

Step-by-step explanation:

To evaluate f(6) substitute x = 6 into f(x)

f(6) = - 2(6)² - 3 = - 2(36) - 3 = - 72 - 3 = - 75

Similarly

g(5) = - 5(5) - 3 = - 25 - 3 = - 28

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A 1.0 l buffer solution is 0.15 m in hcn and 0.10 m in nacn. which action will destroy the buffer?
rjkz [21]

The buffer will probably be destroyed by the addition of HCN.

<h3>What is buffer solution?</h3>

A weak acid and the conjugate base of the weak acid, or a weak base and the conjugate acid of the weak base, are combined to form the buffer solution, a water-based solvent solution. They withstand being diluted or having modest amounts of acid or alkali added to them without changing their pH.

Given that a 1.0 l buffer solution is 0.15 m in HCN and 0.10 m in NaCN.

We need to find a action which one destroy the buffer solution.

A buffer is a substance made of salt and a weak acid that is beneficial. From the aforementioned chemicals, HCN is a potent acid and NaCN is a salt between HF and NaCN. Therefore, the buffer will probably be destroyed by the addition of HCN.

To learn more about buffer solution from the given link

brainly.com/question/22390063

#SPJ4

8 0
2 years ago
Natalie has a choice of three breads five choices of meat and four choices of cheese to make a sandwich how many different sandw
Ivahew [28]
You would have 15 types of sandwiches that she can make
8 0
4 years ago
I need helpppp!! plzz
kumpel [21]

Answer:

Step-by-step explanation:

The slope is 3/2

the y-intercept is -4.5

so the equation is y = 3/2x + (-4.5)

(it’s a plus because the slope is positiv, meaning the line goes upwards to the right.)

8 0
3 years ago
Fiona's school is in the shape of a triangle, with three hallways connecting the corners. Fiona enters the building and walks 90
laiz [17]

Answer: between 30 yards and 60 yards

Step-by-step explanation:

6 0
3 years ago
Heather can complete two problems in ten minutes, and when she started she had three problems done. joel can complete three prob
zzz [600]
 heather can do 2 problems in 10 minutes....60 minutes in an hr
2/10 = x / 60...2 problems to 10 min = x problems to 60 min
10x = 120
x = 120/10
x = 12....so she can do 12 problems in 1 hr

Joel can complete 3 problems in 15 minutes...
3/15 = x / 60
15x = 180
x = 180/15
x = 12....so he can do 12 problems in 1 hr

so 24 problems can be done in 1 hr

Heather started with 3 problems done and Joel started with 2 problems done....added = 5 problems already done

and it is asking between 30 and 50 hrs.....so there is no equal sign in ur problem

ur answer is : 30 < 24x + 5 < 50 <==




5 0
3 years ago
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