Find the x-intercepts for the parabola defined by this equation: y=-3x^2-6x+9

Mathematics

1 answer:

JulijaS [17]2 years ago

7 0

X=1,
X=-3
Use Photomath it helps

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Which of the following is a solution of 4x2 = − 9x − 4?

Arte-miy333 [17]

Step-by-step explanation:

4x2=−9x−4

Step 1: Subtract -9x-4 from both sides.

4x2−(−9x−4)=−9x−4−(−9x−4)

4x2+9x+4=0

For this equation: a=4, b=9, c=4

4x2+9x+4=0

Step 2: Use quadratic formula with a=4, b=9, c=4.

−b±√b2−4ac

−(9)±√(9)2−4(4)(4)

2(4)

−9±√17

−9

√17 or x=

−9

−1

√17

8 0

2 years ago

6x + y > -3 and 2x + y ≤ 4

Sergeu [11.5K]

X greater than negative 1 over 6y plus negative 1 over 2

3 0

2 years ago

The scores on a test for a sample of 42 statistics students are summarized in the following table. 9, 90, 18, 80, 15, 70. Find t

igomit [66]

<h3>Answer: 78.6</h3>

Work Shown:

$\begin{array}{|c|c|} \cline{1-2}\text{Number of People} & \text{Score}\\\cline{1-2}9 & 90\\\cline{1-2}18 & 80\\\cline{1-2}15 & 70\\\cline{1-2}\end{array}$

Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.

$\begin{array}{|c|c|c|} \cline{1-3}\text{Number of People} & \text{Score} & \text{Number*Score}\\\cline{1-3}9 & 90 & 810\\\cline{1-3}18 & 80 & 1440\\\cline{1-3}15 & 70 & 1050\\\cline{1-3}\end{array}$