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Nezavi [6.7K]
2 years ago
9

!!PLEASE THIS IS A QUIZ I NEED HELP PLEASE!! Which statement about the system of equations y=3x+ 9 and y=3x- 4 is true?

Mathematics
1 answer:
-Dominant- [34]2 years ago
4 0

Answer:

The system of the equation has no solution

Step-by-step explanation:

Step: Solvey=3x+9for y:

y=3x+9

Step: Substitute3x+9foryiny=3x−4:

y=3x−4

3x+9=3x−4

3x+9+−3x=3x−4+−3x(Add -3x to both sides)

9=−4

9+−9=−4+−9(Add -9 to both sides)

0=−13

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Please help im desperate :)​
kupik [55]

Answer:

-2

Step-by-step explanation:

You can see that the line is passing through the negative point, which is -2.

I hope this helped!

~natasha

4 0
3 years ago
In a lab, a substance was cooked by 42 C over a period of 7 hours at a constant rate. What was the change in temperature each ho
Mekhanik [1.2K]

Given that we have the change in temperature over 7 hours and we are looking for the change over 1 hour, we can divide the total change in temperature by 7. Thus, the change in temperature would be \frac{42}{7} C^{\circ}.


Additionally, this can be solved by equations:

\dfrac{42 \,\textrm{C}^{\circ}}{7 \,\textrm{hours}} = \dfrac{x \,\textrm{C}^{\circ}}{1 \,\textrm{hour}}

1 \,\textrm{hour} \cdot \dfrac{42 \,\textrm{C}^{\circ}}{7 \,\textrm{hours}} = x \,\textrm{C}^{\circ}

\dfrac{42}{7} \,\textrm{C}^{\circ} = x \,\textrm{C}^{\circ}

\dfrac{42}{7} = x


By using two different methods, we can determine that the change each hour was equal to 42/7 C° per hour.

6 0
3 years ago
A triangular prism is shown in the diagram.
qaws [65]

Answer:

246 cm^3

Step-by-step explanation:

See attached image.

8 0
3 years ago
The students at Midtown Middle school sold flowers as a fundraiser in September and October. In October, they charged $1.50 for
Phoenix [80]
Let the price of flowers in September be x, then (100 + 20)/100 * x = $1.50
120/100 * x = $1.50
1.2x = $1.50
x = $1.50/1.2 = $1.25
The price of flowers in September is $1.25

Total money realised in September = $1.25 x 900 = $1,125
40% earned = 0.4 x $1,125 = $450

Total money realised in October = $1.50 x 700 = $1,050
40% earned = 0.4 x $1,050 = $420

The class earned more money in September and they earned $30 more than in October.


5 0
3 years ago
Which of the following points is a solution of the inequality y < |x - 2|?
crimeas [40]

Answer:

(-2,0)

Step-by-step explanation:

y < |x - 2|

Substitute the points in and check

(-2,0)

0 < |-2 - 2|

0 < |-4|

0 < 4  True

(2,1)

1 < |2 - 2|

1 < |0|

1 < 0  False

(2,0)

0 < |2 - 2|

0 < |0|

0 < 0 False

3 0
3 years ago
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