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4 years ago

What is the square root of 361???

Mathematics

2 answers:

REY [17]4 years ago

8 0

The square root of 361 is 19

Mrac [35]4 years ago

3 0

The square root of 361=19

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If the vertex of a parabola is at (2, 3) and the point (0, -1) is also on the parabola, find an equation for the parabola. Write

STALIN [3.7K]

Answer:

$y=-1(x-2)^2+3$

Step-by-step explanation:

W have been given that the vertex of a parabola is at (2, 3) and the point (0, -1) is also on the parabola. We are asked to find the equation of parabola in the form $y=(x-h)^2+k$ .

We know that vertex form of parabola in form $y=a(x-h)^2+k$ , where (h,k) in vertex of parabola.

Upon substituting coordinates of vertex, we will get:

$y=a(x-2)^2+3$

To find the value of a, we will substitute coordinates of point (0, -1) as:

$-1=a(0-2)^2+3$

$-1=a(4)+3$

$-1=4a+3$

$-1-3=4a+3-3$

$-4=4a$

$\frac{-4}{4}=\frac{4a}{4}$

$-1=a$

Therefore, our required equation would be $y=-1(x-2)^2+3$ .

3 0

3 years ago

Which is an arithmetic sequence with a common difference of 4?

Readme [11.4K]

C because its 4,8,16,20,24,28,32,36,etc

7 0

3 years ago

(help me) Which is the correct operation to use to solve this problem?

antoniya [11.8K]

D 1,020÷15=68 (that's the equation and the answer)

4 0

3 years ago

Solve for x? I'm confused

bezimeni [28]

180-145 will give you your answer cause when its a triangle they all = 180
so you add 80 + 65 = 145
so 180-145

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3 years ago

Help asap show work i will make u brainlest.

Mariulka [41]

Answer: (10) C (11) D (12) B (13) D (14) C (15) A

Step-by-step explanation:

10) 9x - 1 > 9 - x or 7x - 4 ≥ 4 + 9x

+x +x -9x -9x

10x - 1 > 9 -2x - 4 ≥ 4

+1 +1 +4 +4

10x > 10 -2x ≥ 8

÷10 ÷10 ÷ -2 ↓ ÷ -2

x > 1 or x ≤ -4

11) 7 + 4x < 4x - 7 or -x + 6 > x + 6

-4x -4x -x -x

7 < -7 -2x + 6 > 6

FALSE -6 -6

-2x > 0

÷ -2 ↓ ÷ -2

x < 0

12) |x + 1| = 10

x + 1 = 10 or x + 1 = -10

-1 -1 -1 -1

x = 9 or x = -11

x = {9, -11}

13) 3 - 7 | -1 + 2x| = -116

-3 -3

- 7 | -1 + 2x| = -119

÷ -7 ÷ -7

| -1 + 2x| = 17

-1 + 2x = 17 or -1 + 2x = -17

+1 +1 +1 +1

2x = 18 2x = -16

÷2 ÷2 ÷2 ÷2

x = 9 or x = -8

x = {9, -8}

14) 8 - | 2n - 8 | = 0

-8 -8

- | 2n - 8 | = -8

÷ -1 ÷ -1

| 2n - 8 | = 8

2n - 8 = 8 or 2n - 8 = -8

+8 +8 +8 +8

2n = 16 2n = 0

÷2 ÷2 ÷2 ÷2

n = 8 or n = 0

n = {8, 0}

3 0

3 years ago