1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
____ [38]
2 years ago
14

Help. help. help. help.​

Mathematics
1 answer:
Yuri [45]2 years ago
8 0

Answer:

Step-by-step explanation:

You might be interested in
Derive the equation of the parabola with a focus at (-5,5) and a directix of y = -1
Paladinen [302]

Answer:

D

Step-by-step explanation:

From any point (x, y) on the parabola the focus and directrix are equidistant

Using the distance formula

\sqrt{(x+5)^2+(y-5)^2} = | y + 1 |

Squaring both sides

(x + 5)² + (y - 5)² = (y + 1)^2 , that is

(y + 1)² = (x + 5)² + (y - 5)² ← subtract (y - 5)² from both sides

(y + 1)² - (y - 5)² = (x + 5)² ← expand left side and simplify

y² + 2y + 1 - y² + 10y - 25 = (x + 5)²

12y - 24 = (x + 5)² ← factor left side

12(y - 2) = (x + 5)² ← divide both sides by 12

y - 2 = \frac{1}{12} (x + 5)² ← add 2 to both sides

y = \frac{1}{12} (x + 5)² + 2

or

f(x) = \frac{1}{12} (x + 5)² + 2 → D

7 0
3 years ago
The perimeter of a rectangle is 60. The length is twice the width. Find the length and width.
prohojiy [21]

Step-by-step explanation: Our first task in this problem is to setup variables representing <em>length</em> and <em>width</em> and we do that by using the second sentence.

<em><u>The length is twice the width</u></em>

So if we call our width <em>x</em>, that means that our length is 2 times <em>x</em> or 2x

Width of the rectangle ⇒ <em>x</em>

Length of the rectangle ⇒ <em>2x</em>

Before moving on, go ahead and draw a picture of your

rectangle so that you can visualize what's going on.

I have done this for you below.

We label our widths <em>x</em> and our lengths <em>2x</em>.

Now we can use the first sentence to setup our equation.

The perimeter of a rectangle is the distance

around the outside of the figure.

So if our perimeter is 60, that means that x + x + 2x + 2x = 60.

Simplifying by combining like terms, we get 6x = 60.

Now dividing both sides by 6, we find that <em>x = 10</em>.

Since <em>x</em> represents width, our width is 10.

Our length therefore with be <em>2(10)</em> or 20.

So our width is 10 and our length is 20.

8 0
3 years ago
What is the equation in point-slope form of a line perpendicular to y= ⅕ x+8, through the point (-2, 3) *
ivolga24 [154]

Answer:

it was right but ok

Step-by-step explanation:

First find the total number

6+4+5+3 = 18

6th graders : total

4 : 18

Divide each side by 2

4/2:   18/2

2 : 9

4 0
3 years ago
6th grade math help me pleaseeee
Furkat [3]

Answer:

I think it's the top left one

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Jada was using square stickers that were 3/4in long to decorate the spine of a photo album. The spine is 10 and 1/2in long. If s
nevsk [136]

Answer:

13

Step-by-step explanation:

Given:

  1. Square stickers that were 3/4 in long
  2. The spine is 10 and 1/2 in long

If she laid the stickers side by side without gaps or overlaps so the number of sticker to cover the length of the spine:

\frac{The length of the spine}{the length of the sticker}

10 : \frac{3}{4} ≈13  

She needs 13 stickers cover the length of the spine

7 0
3 years ago
Read 2 more answers
Other questions:
  • The sides of an isosceles triangle are 5, 5, and 7. Find the measure of the vertex angle to the nearest degree.
    15·2 answers
  • Two town on a map are 2 1/4 inches apart.the actual distance between the towns is 45 miles. Which of the following could be the
    12·2 answers
  • An athlete eats 0.35kg of protein per week while training. How much protein will she eat during 7 weeks of training?
    10·2 answers
  • I need help with my work<br>​
    11·1 answer
  • Really needing help with this problem
    11·2 answers
  • What is the value of k?​
    7·2 answers
  • 3. Simplify the expression by combining like terms. 10x+2x+4y
    9·1 answer
  • The stock of Company A gained $0.72 throughout the day and ended at a value of $48.72. By what percentage did the stock rise?
    6·2 answers
  • What time will it be in 3/4 hour
    6·1 answer
  • Can you guys help me on this question 4 + 5y - 6y + y
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!