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adell [148]
3 years ago
12

Theresa is comparing the graphs of y=2x and y=5x. Which statement is true?

Mathematics
1 answer:
abruzzese [7]3 years ago
7 0

Answer:

Both graphs have a “y-intercept” at (0,0), so i believe the answer would be they don’t have y intercepts

Step-by-step explanation:

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The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +
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You have a system of equations \left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right..

1. Substitude right side of second equation into the left side of the first equation: -6x+6=-x^2+2x-9.

2. Solve this equation:
 x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4,  \\ \sqrt{D}=2,  \\ x_{1,2}=\dfrac{8\pm 2}{2  } =3,5.

3. Find y:
for x_1=3, y_1=-6\cdot 3+6=-18+6=-12,
for x_2=5, y_2=-6\cdot 5+6=-30+6=-24.

4. The solutions of the system are: (3,-12) and (5,-24).
Answer: Correct choice is A.


7 0
3 years ago
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600 millimeters is the accuracy
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How much 15.50 decreases by 10.75
Daniel [21]
The answer is -30.65%
8 0
4 years ago
Mr. Davis has 15 students in his class he wants to send three of his students to pick up books for the class how many combinatio
rusak2 [61]

Answer:

45 combinations

Step-by-step explanation:

15*3= 45

6 0
3 years ago
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d. If you double a certain number and subtrack 7 you get the same answer as when you add 5 to the number, Determine the number​
umka21 [38]

Answer:

12

Step-by-step explanation:

Let n = the number.

2n - 7 = n + 5

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Let’s check if we got the right answer by substituting 12 for n into the original equation.

2*12 - 7 = 12 + 5

24 - 7 = 17

17 = 17

4 0
2 years ago
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