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nevsk [136]
3 years ago
13

Solve for x and y y+2x=2 y=-4x+10

Mathematics
1 answer:
Katena32 [7]3 years ago
7 0

Answer:

x=4 and y=(-6)

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

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Evaluate the expression.<br> 621+5) - 3
Gennadij [26K]

Answer:

I think its 623

8 0
4 years ago
10. Jenna flips two pennies 105 times. How
Studentka2010 [4]

Answer:

26

Step-by-step explanation:

When you flip two coins, you can have 4 different outcomes:

HH

HT

TH

TT

All outcomes are equally likely, but notice that if you do not keep track of which coin is which, you will get 1/4 of the flips to be both heads, 1/4 of the flips to be both tails, and 1/2 of the flips to be one heads and one tails.

p(both heads) = 1/4

With 105 flips, the expected number of both heads is

105 * 1/4 = 26.25

Answer: 26

7 0
3 years ago
38000000 times 460000000
jonny [76]

Answer:

1.748*10^16

Step-by-step explanation:

(3.8*10^7)(4.6*10^8)=1.748*10^16

3 0
3 years ago
A ticket brokering company is randomly distributing tickets to customers who pre-ordered tickets for an upcoming concert. Out of
bonufazy [111]

Answer:

  • <em><u>12 tickets</u></em>

Explanation:

You must assume that the ratio of the number of tickets in row 7 is a constant.

That permits you to set a proportion with the ratio of the number of tickets in row 7 for the first batch of tickets and the ratio of the number of tickets in row 7 for the next 33 tickets sent out:

<u>1. Ratio of number of tickets in row 7 for the first batch.</u>

  • Number of tickets in row 7: 20
  • Total number of tickets: 20 + 19 + 16 = 55
  • Ratio: 20/55

<u>2. Ratio of number of tickets in row 7 in the next 33 tickets sent out:</u>

  • Number of tickets in row 7: x
  • Total number of tickets sent out: 33
  • Ratio: x/33

<u>3. Proportion</u>

Set the proportion and solve for x:

          \dfrac{20}{55}=\dfrac{x}{33}\\\\\\20\times 33=55x\\\\\\ x=\dfrac{20\times 33}{55}\\ \\ \\ x=\dfrac{20\times 3}{5}\\ \\ \\ x=4\times 3\\ \\ \\ x=12

Answer: 12 tickets

5 0
3 years ago
What is the product in lowest terms ?
Fantom [35]

-\dfrac{5}{12}\cdot\dfrac{8}{13}=-\dfrac{5}{3}\cdot\dfrac{2}{13}=-\dfrac{10}{39}\to\boxed{B.)}

5 0
3 years ago
Read 2 more answers
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