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AlekseyPX
3 years ago
8

X to the power of 2 equals to negative 25

Mathematics
1 answer:
Masja [62]3 years ago
4 0

Answer:22

Step-by-step explanation:

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Kevin and Randy Muise have a jar containing 80 ​coins, all of which are either quarters or nickels. The total value of the coins
SCORPION-xisa [38]

Answer:

  • 39 quarters and 41 nickels

Step-by-step explanation:

Let the number of quarters be x and nickels be y.

<u>Given:</u>

  • Quarter is 25 cents
  • Nickel is 5 cents
  • Number of coins is 80
  • Total amount is $11.80 = 1180 cents

<u>We have equations:</u>

  • x + y = 80
  • 25x + 5y = 1180

<u>Solve the system by elimination, subtract 5 times the first equation from the second one:</u>

  • 25x + 5y - 5x - 5y = 1180 - 80*5
  • 20x = 780
  • x = 780/20
  • x = 39

<u>Find the value of y:</u>

  • 39 + y = 80
  • y = 80 - 39y = 41

<u>Verify:</u>

  • 25*39 + 5*41 = 975 + 205 = 1180
7 0
2 years ago
I need help<br> please someone
mina [271]

Answer:

second option

Step-by-step explanation:

x - y= 28

x+y = 56

4 0
2 years ago
Determine if the question posed is a statistical question (yes) or not (no). What is 2 plus 2?
dimulka [17.4K]

Answer:yes?

Step-by-step explanation:

it has #s in it lol

5 0
3 years ago
Please help fast! (see picture)
valentina_108 [34]

m =  \frac{y2 - y1}{x2 - x1}  \\ m(x2 - x1) = y2 - y1 \\ m(x2 - x1) + y1 = y2
3 0
2 years ago
HELP ASAP PLEASE I HAVE TO TURN THIS IN SOON
Rom4ik [11]

Answer:

B

Step-by-step explanation:

It has a slope of -1/4

and it's y intercept is 2

y = -1/4x + 2  

7 0
2 years ago
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