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olchik [2.2K]
3 years ago
14

I picked up 15 shells and my brother picked up 3 more shells than I did. How many shells sis my brother and I picked altogether?

​
Mathematics
2 answers:
natima [27]3 years ago
8 0
Answer: 33 shells
You picked 15
Your brother picked 18(15+3)
15+18 = 33
Ronch [10]3 years ago
5 0
You’ll have 33 shells
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Type the correct answer in each blank. Use numerals instead of words. If necessary, use / for the fraction bar(s). John hosts an
Law Incorporation [45]
We know that <span>John is hosting an art workshop on the weekends. </span>He has an average of 14 students in each session and charges a fee of $12 per session. <span>. He estimates that for every $2 increases in the fee, the average number of students reduces by 1. 

Therefore, we can conclude that </span><span>his revenue is 14 * 12 or 168 bucks. 

T</span><span>he session price goes up in a pattern of 2. 

For example, from 12 the session price goes to 14, 16, 18 and so on.  

As each jumps goes by 2, the amount of students drop by 1. 

(i.e from 14 students the number decreases to 13, to 12 and so on.) 

As we can see the</span> revenue begins at 168 and continues upward until it reaches 200 dollars and then starts to descend.

This indicates that the<span> U-turn or vertex of the revenue function is approximately 4200, where h represents 4, and k is 200. 

To solve we can use Parabola. 

</span>⇒  Parabola: any point is at an equivalent separation from: 

a settled point (the concentration ), and 

a settled straight line (the directrix )

____________________________________________________

f (x) = a(x - h)^2 + k, where (h, k) is the vertex of the parabola.

⇒ \left \{ {{y=192} \atop {x=2}} \right. 

⇒ 192 = a(2-4)^2+200 

⇒ -8=a(-2)^2 

⇒ -8=a*2^2 

⇒ -8=a*4 

⇒ -8=4a 

⇒ -\frac{8}{4} =  \alpha 

⇒ \alpha = -2 

Now lets do the final step: Simplifying 

y-2(x-4)^2+200<span> 

y=-2(x^2-8x+16)+200 

y=-2x^2+16x-32+200 

c(x) = -2x^2+16x+168</span>

3 0
4 years ago
Given: F(x) = 5x - 6 and G(x) = x - 4
fomenos

Answer:

Correct choice is \dfrac{x+26}{5}

Step-by-step explanation:

1. If F(x)=5x-6, then you can find the inverse F^{-1}(x):

y=5x-6,\\ \\5x=y+6,\\ \\x=\dfrac{y+6}{5},\\ \\F^{-1}(x)=\dfrac{x+6}{5}.

2. If G(x)=x-4, then

y=x-4,\\ \\x=y+4,\\ \\G^{-1}(x)=x+4.

3. Hence,

G^{-1}(F^{-1}(x))=G^{-1}\left(\dfrac{x+6}{5}\right)=\dfrac{x+6}{5}+4=\dfrac{x+26}{5}.

7 0
4 years ago
in sunlight, a vertical stick has a height of 3ft and casts a shadow 2ft long. at the same time, that a nearby tree casts a shad
Gnoma [55]
30 ft. tall. You must find the ratios and compare. 2/20=3/x The best way I know to do this is to cross multiply. 2 times x and 20 times 3. So, 2x= 60. Divide by 2 and you get x =30. The height of the tree would be 30 ft. You could also find the proportion. 20/2= 10, so the height,x, over 3 would be equal to 10. 3 times 10 is equal to 30.
7 0
3 years ago
A rectangular prism has a surface area of 400 cm 2. If it is 10 cm long and 10 cm wide, what is its height? 4 cm 5 cm 8 cm 40 cm
Snowcat [4.5K]

by the way it looks , would be 40 cm

5 0
4 years ago
I NEED HELP ASAP PLS DO STEP BY STEP WILL GIVE BRAINLIEST!!!!!!!!!!!!!
faltersainse [42]

Answer:

x=98

Step-by-step explanation:

Lets reduce then multiply

7 \times  \frac{x}{7}  = 7 \times 14 \\  \\ x = 7 \times 14 \\ x = 98

5 0
4 years ago
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