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posledela
2 years ago
10

50 points HELLP!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
finlep [7]2 years ago
8 0

Answer:

-(8,-1)

Step-by-step explanation:

ira [324]2 years ago
8 0

Answer:

c. -8,-1

Step-by-step explanation:

Hope this helps.

~Learning with Natalia~

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In a contest run by a store, each customer whose purchase exceeds $100 is allowed to draw a discount coupon from a jar. At the b
fiasKO [112]
Answers:
x = 7%
y = 2 slips

Explanation:

The expected value is the result of the sum of each value times its probabilities:

Expeted value = probability 1 × value 1 + probability 2 × value 2 + probability 3 × value 3 + .....


Case 1: at the beginning of the contest:
total number of slips: 30 + 15 + 5 = 50

probability 1 = 30/50

value 1 = 5%


probability 2 = (15/50)
value 2 = x%


probability 3 = (5/50)

value 3 = 15%


⇒  Expected value = 6.6% = (30/50) 5% + (15/50)x% + (5/50)15%
⇒ (15/50)x% = 6.6% - (30/50)5% - (5/50)15%
⇒ (15/50) x% = 2.1% 
⇒ x% = (50 / 15) 2.1% = 7%

Answer: 7%

2) Case 2: at one point, ...


Yet, the equation for the expected value is:

Expeted value = probability 1 × value 1 + probability 2 × value 2 + probability 3 × value 3 + .....

Only the probabilities have changed, but the discounts are the same. This is x% is the same value found above: 7%.

The total number of slips now is 4 + y + 2 = 6 + y

And the expected value becomes:
8% = [ 4 / (6+y) ] 5% + [ y / (6 + y) ] 7% + [2 / (6 + y)] 15%

From which you obtain:

Mulitplying by 6+ y: 8% [6 + y] = 4×5% + y×7% + 2×15%

⇒ 8% y + 8%×6 = 4×5% + y 7% + 2×15%

⇒ 8% y - 7%y = 4×5% + 2×15% - 6×8%
⇒  0.01y = 0.2 + 0.3 - 0.48 = 0.02
⇒ y = 2



6 0
3 years ago
For the values a = 7.2 which is a leg of a right triangle, and value c = 11.1, which is the hypotenuse, find the length of the o
Lelechka [254]
Phythagoras theorem:
hypotenuse²=leg₁²+leg₂²

Data:
leg₂=7.2
hypotenuse=11.1

Therefore:

(11.1)₂=leg₁² +(7.2)²
123.21=leg₁²+51.84
leg₁²=123.21 - 51.84
leg₁²=71.37
leg¹=√(71.37)
leg₁=8.4

Answer: b=8.4
4 0
4 years ago
Read 2 more answers
5. If 15 men can finish a work in 16 days in how many days will 8 men can finish the same work? a. 15 b. 20 c. 30 d. 42​
Gnom [1K]

Answer:

C. 30

Step-by-step explanation:

15 men do work in 16 days

This means that 7.5 men (15/2) would do that same work in 32 days (16x2).

If the number of men increase, the amount of days decrease.

8 men would do that work in 30 days

8 men > 7.5 men

30 days < 32 days

7 0
2 years ago
Read 2 more answers
Lisa collected leaves from different trees for a science project. Every day for a week (7 days), she collected 7 leaves. How man
Anna35 [415]
The total number of leaves that was collected by Lisa is the product of the number of days in a week and the number of leaves she collected per tree. This is shown below,
              (7 trees / week) x (7 leaves / 1 tree) = 49 leaves / week
Thus, Lisa collected 49 leaves in a week. 
7 0
3 years ago
30 points ASAP! <br> Help!!! Explanation would be great of how to do it.
Fofino [41]
<h3>Answer:   14400</h3>

Chances are your teacher doesn't want you to enter any commas. You won't type in the dollar sign either.

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

Explanation:

Nice work on selecting the correct equation to set up.

We'll cross multiply to help solve for x.

The idea of cross multiplication is that \frac{A}{B} = \frac{C}{D} turns into A*D = B*C

So,

\frac{5040}{280000} = \frac{x}{800000}\\\\5040*800000 = 280,000*x\\\\4,032,000,000 = 280,000x\\\\280000x = 4,032,000,000\\\\x = \frac{4,032,000,000}{280,000}\\\\x = 14,400\\\\

That means the person would pay $14,400 on a property worth $800,000.

4 0
3 years ago
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