A telephone company charges 50 cents for along distance call for the first two minutes, and
30 cents for each additional minute. Find the cost
of a 15-minute call.

Answers

Answer 1

Answer:

Answer: $4.40 is the cost for the call

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7th grade math help me plzzz

Answers

Answer:

a. -7 + 3

b. draw 7 negatives + 7 positives

Step-by-step explanation:

Answer:

3.a) -7 + 3

3.b) 4

I hope this helps!

An electronics store has a current inventory of 50 stereo systems. The lowest priced stereo system in the store sells for $800, The lowest priced stereo system in the store sells for 800 dollars, and the highest priced stereo system sells for $3000. and the highest priced stereo system sells for 3000 dollars. Which of the following is the maximum amount of $3000 systems on hand Which of the following is the maximum amount of 3000 dollar systems on hand if the current inventory totals $111,000?The answer is 32, I need an explanation how to find the answer.

Answers

B) 32

Explanation:

let H = number of expensive high price stereo

systems

let L = number of less expensive low price

stereo systems

H +L = 50 =

3,000H + 80OL = 110,000

H = 50 - L (now replace)

3,000 (50 - L) + 800 L = 110,00

150,000 - 3,000L + 800L = 110,000

150,000 - 110,000 = 3,000L - 800L =

40,000 = 2,2OOL

L = 40,000 / 2,200 = 18.18 = 18 lower priced = =

stereo systems H = 50 - 18 = 32 higher priced stereo systems

=

=

(3,000 x 32) + (800 x 18) = 96,000 + 14,400 = 110,400

Even though the answer is not exact, if you had 33 high cost stereo systems, your inventory's cost = $112,600 which is $1,600 off

The center of the circle is located (3'8), and the circle has a radius that is 5 units long. What is the general form of the equation for the circle

Answers

9514 1404 393

Answer:

x² +y² -6x -16y +48 = 0

Step-by-step explanation:

Given:

circle center: (3, 8)
circle radius: 5

Find:

general form equation for the circle

Solution;

The standard form equation for the circle is ...

(x -h)² +(y -k)² = r² . . . . . circle with radius r centered at (h, k)

(x -3)² +(y -8)² = 5²

Subtracting 25 and expanding this will give the general form.

x² -6x +9 +y² -16y +64 -25 = 0

x² +y² -6x -16y +48 = 0

_____

Additional comment

"General form" of an equation is usually the form f(x,y) = 0, where f(x, y) is written in "standard form," with terms in lexicographical order and decreasing degree.

Complete the pattern 0.095 9.5 950 95,000 9,500

Answers

Answer:

the next number is 9,500,000 each time you multiply the number by 100

Step-by-step explanation:

0.095×100=9.5

9.5×100=950

and so on good luck

Silvio wants to find the perimeter of quadrilateral ABCD. He begins by computing the length of side AB using the distance formula. Finish Silvio’s work to find the length of side AB.

Answers

Answer:

Step-by-step explanation:

AB = √(-4)² + (-3)²

AB = √ 16 + 9

AB = √ 25

AB = 5

AD = 4 ; DC = 4 ; BC = 7

Perimeter = 5 + 4 + 4 + 7 = 20 units

A Christmas tree is supported by a wire that is 9 meters longer than the height of the tree. The wire is anchored at a point whose distance from the base of the tree is 41 meters shorter than the height of the tree. What is the height of the tree

Answers

Answer:

The height of the tree is 80 meters.

Step-by-step explanation:

Let the height of the Christmas tree be x meters.

Then the length of the wire will be, (x + 9) meters.

And the wire will (x - 41) meters away from the base of the tree.

Consider the diagram below.

Use Pythagoras theorem to solve for x as follows:

$AB^(2)=AC^(2)+CB^(2)$

$(x+9)^(2)=x^(2)+(x-41)^(2)\n\nx^(2)+18x+81=x^(2)+x^(2)-82x+1681\n\nx^(2)-100x+1600=0\n\nx^(2) -80x-20x+1600=0\n\nx(x-80)-20(x-80)=0\n\n(x-80)(x-20)=0$