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krek1111 [17]
3 years ago
5

HELP ASAP ROCKY!!! will get branliest.​

Mathematics
1 answer:
Alina [70]3 years ago
7 0

Step-by-step explanation:

Haley: 10x + 155

brother: 230-15x

10x+155=230-15x

25x + 155 = 230

25x = 75

x = 3 weeks

10(3)+155= 30+155= $185 for Haley

230-15(3)= 230-45= $185 for brother

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There are 20 black, 15 white, 12 green, 12 red, 9 blue and 2 yellow candies in a box. How many candies should you take (without
kow [346]
<h3>Answer:  13</h3>

=============================================================

Explanation:

The best case scenario is that you get 3 of the same color in a row on the first three attempts. The lower bound is 3.

However, we have to consider the worst case scenario when we want to guarantee something like this, without looking at the candies we selected.

Consider the case of something like this sequence:

  1. black
  2. white
  3. green
  4. red
  5. blue
  6. yellow
  7. black
  8. white
  9. green
  10. red
  11. blue
  12. yellow
  13. black

As you can see above, I've listed the colors in the order presented by your teacher. I pick one candy at a time. Once I reach yellow, I restart the cycle. In slots 1, 7 and 13, we have a black candy selected. This example shows that we must make 13 selections to guarantee that we get at least 3 candies of the same color (that color being black). The order of the candies selected doesn't matter. We could easily use any other color except yellow to do this example. The black candy just happened to be the first listed, so I went with that.

Note how we have 6 unique colors in the set {black, white, green, red, blue, yellow}. If we pick 2 candies of each color, then we've selected 6*2 = 12 candies so far. That 13th candy (some color other than yellow) is guaranteed to be a color we already selected; therefore, we'll be guaranteed to have 3 of the same color. We won't know what color it is but we will know we have a match like this.

For more information, check out the Pigeonhole Principle.

4 0
2 years ago
Con un diámetro de 4x y un ares de 28.26cm cual es el valor de X
ASHA 777 [7]

Answer:

2826/25

Step-by-step explanation:

28.26×4=========2826/25

5 0
2 years ago
Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280lb mixt
TiliK225 [7]
0.14x + 0.07(280-x) = 0.08*280

0.14x + 19.6-0.07x = 22.4

0.07x + 19.6 = 22.4

0.07x = 2.8
x = 2.8 / 0.07 = 40
 x = 40 pounds of Soybean
280 -40 = 240 of cornmeal



7 0
3 years ago
The diameter of a circle pass through
Neko [114]
The diameter of a circle passes through the middle
8 0
3 years ago
Micheal was asked to give examples of the identity property of addition and identity multiplication. Below are his answers.
xxMikexx [17]

Answer:

identity property of addition-

a+0=a

identity property of multiplication-

a*1=a

Step-by-step explanation:

i cant give u an exact answer as u didnt give Micheals answers so i just gave some examples about what addition and multiplication identity property should look like. Identity property's concept is to keep the same identity. Basically, "a" shouldnt change. In addition, to keep a the same all u hv to do is add 0 as anything plus 0 is the same. for multiplication, just multiply by 1. Hope this helps!!

5 0
3 years ago
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