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Gala2k [10]
3 years ago
15

How do you solve equations by substitution​

Mathematics
1 answer:
Jet001 [13]3 years ago
4 0

Answer: The method of solving "by substitution" works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, "substituting" for the chosen variable and solving for the other. Then you back-solve for the first variable.

Step-by-step explanation:

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A student bought 1 box of crayons and 5 reams of paper for $54. She bought 5 boxes of crayons and 3 reams of paper for $50. What
irina1246 [14]

Answer:

A student bought 1 box of crayons and 5 reams of paper for $54 and 5 boxes of crayons and 3 reams of paper for $50.The cost of each box of crayon and each ream of paper will cost $4 for a box of crayons and $10 for a ream of paper.  hope this helps

7 0
3 years ago
A 2-liter bottle is filed completely with water from a faucet in 10seconds. How much water is filled into the bottle each second
andreev551 [17]
In 10 seconds, in fills = 2 L
so, in 1 sec, it will fill = 2/10 L = 1/5 L = 0.2 L or 200 mL

In short, Your Answer would be 0.2 Liter or 200 milliliter

Hope this helps!
4 0
3 years ago
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A plane flying overhead at night is located by two
Gemiola [76]

Answer:

Step-by-step explanation:

B

2

3

​

​

Let the distance of two consecutive stones are x, x+1.

In ΔBCD, we have

tan60

o

=

x

h

​

⇒x=

3

​

h

​

      .....(i)

In ΔABC, we have

tan30

o

=

x+1

h

​

⇒

3

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1

​

=

x+1

h

​

⇒

3

​

h

​

+1=

3

​

h       ......[from equation (i)]

⇒

3

​

2h

​

=1

⇒h=

2

3

​

​

 km

solution

6 0
3 years ago
Look at this I really need help with this
Anettt [7]

y = 7500 {(.97)}^{0}  \\  = 7500(1) \\  = 7500
D
6 0
3 years ago
Todd buys 3 CDs at $16.99 each and a DVD that costs $24.99. He pays
VikaD [51]

Answer:

$24.04

Step-by-step explanation:

3 x $16.99 = $50.97

1 x $24.99 = $24.99

$24.99 + $50.97 = $75.96

$100 - $75.96 = $24.04

5 0
3 years ago
Read 2 more answers
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