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Reptile [31]
3 years ago
7

Need help with solving a 2x2 system of linear equations PLEASE HELP ME

Mathematics
1 answer:
Yakvenalex [24]3 years ago
7 0
\bf \begin{array}{llll}
-5x-y=5\\
-5x+y=5\\
-------\\
-10x+0=10
\end{array}\implies -10x=10\implies x=-1

so if x = -1, let's plug that in the second equation

-5(-1)+y = 5
5+y = 5
y = 0
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HELP ASAP plz I’ll give brainliest and plz explain:)
yaroslaw [1]

Answer: No, Store A is charging $2.20 per rose while Store B is charging 2.166667 dollars per rose.

Step-by-step explanation:

11/5 = 2.2

(To check) 2.2 x 5 also equals $11

However, they are not selling roses at the same rate because if you were to do 2.2x6 it will equal 13.2.

13/6 = 2.166667

4 0
3 years ago
Read 2 more answers
Miche found that most helicopters fly at speeds of less than 270 kilometers per hour. Her work is shown below. s > 270 A numb
almond37 [142]

Answer:

  • The inequality should be s<270.
  • The number line should be shaded to the left.

Step-by-step explanation:

Miche found that most helicopters fly at speeds of less than 270 kilometers per hour.

If s=speed of the helicopters

  • Then: s<270

Representing this on a number line:

  • We have an open circle at 270.
  • Everything to the left of the circle is shaded.

Since the options are not given, I would list the mistakes made by Miche.

  • The inequality should be s<270.
  • The number line should be shaded to the left.

6 0
3 years ago
25 POINTS!!! Simplify 3x - 4 - 5x = 6 + 4x + 2
Maksim231197 [3]
3x-5x-4x=6+2+4
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Hope this can help.
6 0
3 years ago
Find the rate of change of the following table.
Serjik [45]

Answer:

\frac{1}{3}

Step-by-step explanation:

The rate of change is measured by the slope of the line in this linear table.

Calculate the slope m using the slope formula

m = \frac{y_{3}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 3, 0) and (x₂, y₂ ) = (3, 2) ← 2 ordered pairs from the table

m = \frac{2-0}{3+3} = \frac{2}{6} = \frac{1}{3} ← rate of change

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3 years ago
Find the slope of the line that passes through (-34, 81) and (32, 12).
Sauron [17]

Answer:-23/22 or -1.045

Step-by-step explanation:

slope = rise/run

Slope =y2−y1x/2−x1 (The 2's and 1's here should be subscripts sorry)

slope= 12-81 (the y's) divided by 32-(-34)( the x's)

12-81/32-(-34) (Parentehsis just to emphisis the minus a negative number  the second coordinate is -32)

slope= -69/66

simplfy to -23/22 or to decimal

slope = -1.045

7 0
2 years ago
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