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Liula [17]
4 years ago
15

Ella bought some key chains. if she paid $24 for the keys chains, and each one cost the same wholedollar amount , how many could

she have bought?
a.5
b.6c.7d.10
Mathematics
1 answer:
olga_2 [115]4 years ago
3 0
Hello,                                                                                                                       To solve this problem, you need to use a process of trial and error, and add up each number until you get 24 or above.  If you get above, it is wrong.  The only number that goes into 24 evenly is 8, so the answer is 8 keychains.<span>
</span>
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I Need help <br><br><br><br> Find the length of ad
Bingel [31]

Answer:

AD = 104

Step-by-step explanation:

Since is the perpendicular bisector of AD, then

DB = AB, that is

9x - 2 = 7x + 10 ( subtract 7x from both sides )

2x - 2 = 10 ( add 2 to both sides )

2x = 12 ( divide both sides by 2 )

x = 6

Thus

AD = 7x + 10 + 9x - 2 = 16x + 8 ← substitute x = 6

AD = 16(6) + 8 = 96 + 8 = 104

7 0
3 years ago
4x- [ x +2 ] + 6 = 2 [ 3x +8 ]
slava [35]

Answer:

x=-4

Step-by-step explanation:

4x-(x+2)+6=2(3x+8)

4x-x-2+6=6x+16

3x+4=6x+16

4=6x-3x+16

4=3x+16

3x=4-16

3x=-12

x=-12/3

x=-4

7 0
3 years ago
Average sales for an online textbook distributor were $67.63 per customer per purchase. Assume the sales are normally distribute
Fynjy0 [20]

Answer:

(a)P(x>85.55)=0.02275

(b)P(x

Step-by-step explanation:

We are given that

Average sales for an online textbook distributor  per customer per purchase

,\mu=$67.63

Standard deviation of the amount spent on textbooks,\sigma=$8.96

(a) We have to find probability for a randomly selected customer spent more than $85.55 per purchase.

P(x>85.55)=P(\frac{x-\mu}{\sigma}>\frac{85.55-67.63}{8.96})

=P(Z>2)

=1-P(Z\leq 2)

=1-0.97725

P(x>85.55)=0.02275

(b)We have to find probability for a randomly selected customer spent less than $76.59 per purchase

P(x

P(x

P(x

6 0
3 years ago
What is the maximum Number of different sizes of faces that a rectangular Prism can have.
telo118 [61]

Answer:

3

Step-by-step explanation:

For a rectangular prism of dimensions L × W × H, pairs of opposite faces will have dimensions ...

  • L × W
  • W × H
  • H × L

These will be three different sets of dimensions if L, W, and H are all different lengths.

7 0
3 years ago
A submarine is at 200 meters below sea level to begin its mission. Then, it dives to a depth of 4 times its initial depth.Where
Kaylis [27]

Answer:

1000 meters below sea level

Step-by-step explanation:

Since the submarine dives at a depth of 4 times 200 meters, then it dives 800 meters.

Sso the submarine now is at 200 meters + 800 meters =1000 meters below sea level.

3 0
3 years ago
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