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Kamila [148]
4 years ago
8

7x + 2y=-7 y=5x+5 I need help with this

Mathematics
1 answer:
AlexFokin [52]4 years ago
6 0
Make the first system of question in y=... form and then just equal 5x+5= whatever the other one equals.
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Derek measured the height of a window frame as 5.49 feet, but the actual height was 6 feet. What is the percentage of error in D
Dvinal [7]
The percentage of error in deters measurement is 8.50%

6 - 5.49 = 0.51%
100% = .51/6
100% = 8.5%
5 0
3 years ago
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The length of a rectangle is 5 ft less than three times the width, and the area of the rectangle is 28 ft2 . find the dimensions
Minchanka [31]
Let the width = w.
Then the length is 3w - 5.
The area = LW = 28

w(3w - 5) = 28

3w^2 - 5w = 28

3w^2 - 5w - 28 = 0

(3w + 7)(w - 4) = 0

3w + 7 = 0 or w - 4 = 0

w = -7/3 or w = 4

The width of a rectangle cannot be a negative number, so we discard w = -7/3.

The width is 4 ft.
The length is 3w - 5 = 3(4) - 5 = 12 - 5 = 7
The length is 7 ft

Answer: The dimensions are length 7 ft and width 4 ft.
6 0
4 years ago
in the table below x is the number of loaves of bread maria bakes and y is the cups of flour she uses which table could be model
Sedaia [141]

Answer:

Answer Choices??

Step-by-step explanation:

8 0
3 years ago
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Solve the system of equations by substitution. Write your solution as an ordered pair
oksano4ka [1.4K]

Answer:

hello

Step-by-step explanation:

djh;vkajhkjbcbvusiwihalkjfbih

6 0
3 years ago
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Scott and Isaac went to the school carnival. Scott ride on 5 rides and played 4 games. Isaac rode on 7 rides played 2 games. If
BlackZzzverrR [31]

Answer:

The cost of the rides are 3 tickets

And 1 ticket per game

The ride and game cost 3 tickets and 1 ticket for each respectively.

Step-by-step explanation:

Step 1 of 5

Let <em>a</em> be the number of tickets per ride costs. And <em>b</em> be the number of tickets per game costs.Thus from the given, we get the equations. For Scott, <em>5a+4b=19</em>    For Isaac,  <em>7a​+2b=23</em>

Step 2 of 5

Multiplying the equation 2 by 2, we get  ​<em>5a+4b=19→1</em>  <em>14a+4b=46→2​</em>

<em>Step 3 of 5</em>

<em>By subtracting both the equations, we get </em>

<em>(−)​5a+4b=1914a+4b=46​          </em>

<em>_____________         </em>

<em>−9a      =−27                  </em>

<em>  ​a=−27−9⇒a=3​</em>

Step 4 of 5

<em>Substituting the above value in the equation 1, we get​5(3)+4b=1915+4b=194b=19−154b=4b=44⇒b=1​</em>

<em>Step 5 of 5 </em>

<em>The solution is (3,1).The cost of the rides is 3 tickets per ride.The cost of the games is 1 ticket per game.</em>

<em>sorry its really confusing this how I was taught tho. </em>

7 0
3 years ago
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