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yaroslaw [1]
3 years ago
7

Help asap 25 points worth pre alg x= y=

Mathematics
1 answer:
Mumz [18]3 years ago
8 0

Answer:

Firstly Substitute y=2x-5 into 5x-4y=-10

This will be 5x-4(2x-5)=10 now solve for x

5x-8x+20=-10

-3x=-30

X=10

Now sub x as 10 into the second equation y=2x-5

Y=2(10)-5

Y=15

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A cleaning company charges x dollars per hour to clean floors and y dollars per hour to clean the rest of the house
Nina [5.8K]

Answer:

(15,18)

Step-by-step explanation:

write two equations with the information provided.

2x + 3y = 84

x + 4y = 87

use the property of substitution to answer.

x + 4y = 87,   x = 87 - 4y

2(87 - 4y) + 3y = 84

174 - 8y + 3y = 84

174 - 84 = 8y - 3y

90 = 5y

90/5 = y

y = 18

Add the value of Y to an original equation. Solve for X

2x + 3(18) = 84

2x + 54 = 84

2x = 84 - 54

2x = 30

x = 30/2

x = 15

8 0
3 years ago
Solve for x and explain how I show work
DaniilM [7]

Answer:

x = 100

Step-by-step explanation:

(x - 20) + x = 180  

2x - 20 = 180

<u>    + 20    +20</u>

2x = 200

x = 200/2

x = 100

3 0
3 years ago
Which number is 5.389 rounded to the nearest hundredth? A 5.4 B 5.38 © 5.39 05.399
ankoles [38]

Answer:

c) 5.39

Step-by-step explanation:

The digit that is in the hundredths place is the 8. (The hundredths are two digits to the right of the point).

The thousandths in this case would be the 9, since the 9 is close to the next hundredth, the nearest hundredth would be 9 (adding 1 to the 8), therefore the number would be 5.39

7 0
3 years ago
Draw a number line to show the product of 1/3 and 3/4
Anastasy [175]

the answer to 1/3 times 3/4 is 1/4

8 0
3 years ago
Someone pelase help ASAPPPPPP
Natasha_Volkova [10]

Answer:

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Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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