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1 year ago

Please need help fast! y= -5x^2 +9 in vertex form thx in advance

Mathematics

1 answer:

ira [324]1 year ago

4 0

Answer: (0,-9)

Step-by-step explanation:

I put it in math-way hope this helps

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Solve 3(x - 2) < 18. A{x\x<8) B{x1x > 8) C[xlx<-8} D{xl x>-8)

Evgen [1.6K]

Answer:

A. {x | x < 8}

Step-by-step explanation:

First, we divide both sides by 3.

3(x - 2)/3 < 18/3

Then simplify.

x - 2 < 6

Lastly, add 2 to both sides.

x - 2 + 2 < 6 + 2

x < 8

8 0

4 years ago

Ed is planning daily walking workouts on the same distance of 12 km in the morning and in the evening. Usually he is walking at

melamori03 [73]

Answer:

The morning rate is 5 km/h

Step-by-step explanation:

Let the evening time is t

∴ The morning time = total time - t

∵ Total time is 5 hours and 24 minutes = 5 + 24/60 = 5 + 2/5 = 5.4 hrs

∴ The morning time = 5.4 - t

∵ The rate = distance / time

∵ Morning distance = 12 and morning time = (5.4 - t) h

∵ Evening distance = 12 km and evening time = (t) h

∵ The morning rate = (evening rate + 1) km/h

∴ 12/(5.4 - t) = 12/(t) + 1

∴ 12/(5.4 - t) = (12 + t)/t ⇒ use cross multiplication

∴ (5.4 - t) (12 + t) = 12 × t

∴ 64.8 + 5.4t - 12t - t² = 12t

∴ 64.8 - 6.6t - t² = 12t

∴ t² + 6.6t + 12t - 64.8 = 0

∴ t² + 18.6t - 64.8 = 0

∴ (t - 3) (t + 21.6) = 0 ⇒ (t + 21.6) rejected no -ve value for time)

∴ t - 3 = 0 ⇒ t = 3 h

∵ The evening time = 3 h

∴ The morning time = 5.4 - 3 = 2.4 h

∴ The morning rate = 12/2.4 = 5 km/h

8 0

4 years ago

Read 2 more answers

today each cookie costs 0.75 less than the normal price. pight now if you buy 7 of them it will only cost you 2.80 . writw an eq

lbvjy [14]

The normal price of each cookie is $1.15 derived from the equation, c =today price of each cookie + 0.75

Solution:

Given, Today each cookie costs 0.75 less than the normal price.

Right now if you buy 7 of them it will only cost you 2.80

We have to write an equation to determine the normal price of each cookie(c)

And, we are given that, today 7 cookies cost 2.80

Let the cost of one cookie today be “n”

Then we get,

Today 7 cookies ⇒ 2.8

Then, 1 cookie ⇒ n

By criss cross multiplication we get,

$\begin{array}{l}{7 \times n=2.8 \times 1} \\\\ {\rightarrow 7 n=2.8} \\\\ {\rightarrow n=0.4}\end{array}$

Which means that, each cookie costs $0.4 today

Now, we know that,

normal price of each cookie, c = today price of each cookie + $ 0.75

c = 0.4 + 0.75

c= 1.15

Hence, the normal cost of each cookie is $1.15 derived from the equation, c = today price of each cookie + 0.75

3 0

3 years ago

_______________________

MrMuchimi

To get the answer we have to multiply number of products times cost of 1 (oz/loaf/pound) and add it together.
pickles
128*0.20=25.6
bread
24*0.75=18
coffee
25*2.05=51,25
Finally we can add it.
25.6+18+51.25=94,85$ - its the answer

7 0

3 years ago

Read 2 more answers

Please help me I’m terrible at math

irga5000 [103]

Answer:

...

Step-by-step explanation:

can you show us the options of the drop-down menus?

8 0

4 years ago