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RSB [31]
3 years ago
8

In the graph shown, which ordered pair does NOT represent a solution to the graph?

Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
8 0
A) (1, 7) Doesn't
B) (0, 4) Doesn't
C) (2, –2) Doesn't
D) (3, –5) DOES

All the steps are right at the exception of line 7 (and onwards)

line 6 : 6x = 42 (it's right). Now divide both sides by 6:

line 7 should be:  6x/6 = 42/6
line 8 should be: x = 7. 

deff fn [24]3 years ago
4 0
Problem 1)

Check out the attached image "figure 1". The graph of the line is shown in red. The red line is the equation y = -3x+4. The answer choices A through D are shown as blue points. Only point A = (1,7) is not on the red line. So point A is not a solution to the equation.

Answer: Choice A) (1,7)

=============================================

Problem 2)

First error is in step 3, specifically the "additive inverse" portion. It should be "additive property of equality" since we're adding 10x to both sides.

The second error is the reasoning in step 5. Instead of "symmetric property" it should be "subtraction property of equality".

The third error is all of line 7. We are not multiplying both sides by 6. Instead we divide both sides by 6. The reasoning should be "division property of equality"

Finally, the last error is the first column on line 8. The final answer should be x = 7 (since 42 divided by 6 = 7)

See the image attachment "figure 2" for the visual summary of the table, and what needs to be fixed.

=============================================

Problem 3)

The equation I have come up with is 8x-4+2x = 3x-11

The steps to solve it are shown in the image attachment labeled "figure 3"

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A coach can hold 50 people how many coaches would be needed for 830 people?
marusya05 [52]

Answer:

Exact: 16.6

Rounded: 17

Step-by-step explanation:

1 coach = 50 people                  (50 / 1 = 50 people)

2 coaches = 100 people            (100 / 2 = 50 people)

x coaches = 830 people            (830 / x = 50 people)

830 / x = 50

mutely both sides by x

830 / x * x = 50 * x

830 = 50x

divided both sides by 50 to get x alone

830 / 50 = 50x / 50

830/50 = x

16.6 couches needed to fit 830 people

5 0
2 years ago
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5x+2(1-x)=2(2x-1)<br> x=6<br> O x=-3<br> O x = 3<br> O<br> x = 9
Katena32 [7]

Answer:

x= 4

Step-by-step explanation:

We do like:

5x+2(1-x)=2(2x-1)

5x + 2 -2x = 4x -2

or 3x +2 = 4x -2

3x-4x +2 = -4x+4x -2

or -x +2= -2

and -x+2 -2 = -2 -2

or -x = -4

and x = 4 is the solution.

Have a good day.

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A company's logo was designed using circles of 3 different. sizes. The diameters of two of the circles are shown. Which measurem
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Answer:

option D . 254.34cm^2

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

The options are:

A . 56.52cm^2

B . 141.30cm^2

C . 1,017.36cm^2

D . 254.34cm^2

step 1

Find the diameter of the largest circle

we know that

The diameter of the largest circle is equal to the sum of the diameter of the two inside circles

so

D=6+12=18\ cm

step 2

Find the area of the largest circle

we know that

The area of the circle is given by the formula

A=\pi r^2

we have

r=18/2=9\ cm ----> the radius is half the diameter

assume

\pi=3.14

substitute

A=(3.14)(9^2)=254.34\ cm^2

4 0
3 years ago
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