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Sphinxa [80]
3 years ago
13

What is the solution to the system of equations? Use the substitution method to solve the system of equations. Show all of your

work! Y = x + 5 4x ? 4y = ?20
Mathematics
1 answer:
Luden [163]3 years ago
5 0

Answer:

The solution would be (0, 5)

Step-by-step explanation:

In order to solve this system by substitution, simply take the value of y in the first equation and use it in place of y in the second. This will allow you to solve for x.

4x + 4y = 20

4x + 4(x + 5) = 20

4x + 4x + 20 = 20

8x + 20 = 20

8x = 0

x = 0

Now that we have the value of x, we can find the value of y.

y = x + 5

y = 0 + 5

y = 5

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Stephanie went to the shoe store and bought two pairs of flip-flops one pair was 19.95 and the other was 23.55 if she had $50.00
Levart [38]

Answer:

$6.9

Step-by-step explanation:

23.55 + 19.95 = 43.1 (total amount spent)

She had $50 and she spent $43.1 on shoes

50 - 43.1 = 6.9

= $6.9


7 0
3 years ago
Pump 1 can empty a pool in 8 hours while Pump 2 can empty the same pool in 9 hours. If the two pumps worked together, how long w
yan [13]
<span>Rate of pump A: 1/8 of a pool per hour 
Rate of pump B: 1/9 of a pool per hour 
Combined rate: 1/8+1/9 = 17/72 +1/9 = 25/72 

So if they work together, the two pumps have a combined rate of 25/72 of a pool per hour (i.e in one hour, the two pumps will empty 25/72 of the pool) 

</span><span>But we want to empty ONE pool (not 25/72 of one). So we need to multiply 25/72 by some number x to get 1.
 </span>
<span>Now solve for x 
x=2.88
</span><span>It will take the two pumps 2.88 hours to empty the pool.
2 hours 52 minutes 50 seconds</span>
7 0
3 years ago
How do I solve (21/12)/(7/12) ?<br>Is the answer 3?
alukav5142 [94]
It is! When you're doing a fraction specifically like that, the denominators cancel out. Therefore you can get rid of the 12. It just becomes 21/7, which as you know is 3.

Hope that helps :)
5 0
3 years ago
Help me please on this please open the whole photo so you can see other problems ​
OlgaM077 [116]

Answer: 1. 57

               2. 43

              3.  20

             4.  32

             5.    16

Step-by-step explanation: am here to help

7 0
2 years ago
PLEASE HELP DUE SOON
Mazyrski [523]

Answer:

A

Step-by-step explanation:

The lines cross or touch the X-Axis 4 times which means that there are 4 solutions.

7 0
3 years ago
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