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Dafna11 [192]
3 years ago
7

7x+3y =-4 X-5y=-6 substitution please explain

Mathematics
1 answer:
inysia [295]3 years ago
4 0
First you have to isolate one of the equations for y=mx+b.
Then substitute the equation is made into the first equation
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A shop has one-pound bags of peanuts for $2 and three-pound bags of peanuts for $5.50. If you buy 8 bags and spend $37, how many
Andrew [12]

Answer:

  • 6 3-lb bags
  • 2 1-lb bags

Step-by-step explanation:

Let x represent the number of 3-lb bags purchased. Then the total purchase was ...

  $2(8 -x) +$5.50(x) = $37

  16 +3.50x = 37 . . . . . . . . . divide by $, collect terms

  3.50x = 21 . . . . . . . . . . . . . subtract 16

  21/3.50 = x = 6 . . . . . . . . divide by the coefficient of x

You bought 6 3-lb bags of peanuts and 2 1-lb bags.

4 0
4 years ago
Do you think making a table is the best way to find the total area of the rooms
Komok [63]
Well it depends on how many tables you are using and if all the sides of the table are equal lengths....you can it will not hurt anything just make sure you right down all of the area length/width that you cover that way you get the amount you need :) remember to hit that thanks button please:)
6 0
4 years ago
Which expression is<br> equivalent to the following complex fraction?
tino4ka555 [31]

Answer:

(y - x)/(y + x)

Step-by-step explanation:

(1/x - 1/y)/(1/x + 1/y) =

= (1/x - 1/y)/(1/x + 1/y) × (xy)/(xy)

= (y - x)/(y + x)

8 0
2 years ago
Find the measures of the interior angles?
Ludmilka [50]

Answer:

well it's says for a its 35° and B is 100° to find x it would be 180-(35+110)=x

Step-by-step explanation:

180-(35+110)=180-145=35. so x=35°

4 0
3 years ago
True or false? The GCF of any two odd numbers is always odd
nevsk [136]
The answer to this question would be true.

An odd number wouldn't have any 2 in their factor because it is the definition of odd number, can't be divided by 2. Since they have no probability of having factor 2, then their GCF would not become an even number.
4 0
3 years ago
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