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beks73 [17]
2 years ago
11

Hiii pleasee help if u know it :)​

Mathematics
2 answers:
Free_Kalibri [48]2 years ago
8 0

Answer:

82

Step-by-step explanation:

shepuryov [24]2 years ago
6 0

Answer:

82 M

Step-by-step explanation:

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An electrician earns 100 dollars for a project installing light fixtures. She must pay for the light fixtures herself and they c
Gnoma [55]

Answer:

y = 100 - 2.5 x is the equation that represents her total profit from

the project

Step-by-step explanation:

The given is:

1. An electrician earns 100 dollars for a project installing light fixtures

2. She must pay for the light fixtures herself and they cost 2 dollars

   and 50 cents each

3. x represent the number of light fixtures and y represent her

  total profit

Her profit is the amount of money she has left over after paying for

the light fixtures

∵ The cost of each light fixtures is 2 dollars and 50 cents

- Let us change the cents to dollar

∵ $1 = 100 cents

∴ 50 cents =  dollar

∴ 2 dollars and 50 cents = $2.5

∵ Her profit = The money she earns - The money she pays

∴ The cost of each light fixtures = $2.5

∵ She installs x light fixtures

∴ She pays 2.5 x dollar

∵ She earns $ 100 for installing x light fixtures

∵ Her profit is $y

∴ y = 100 - 2.5 x

y = 100 - 2.5 x is the equation that represents her total profit from

the project

Step-by-step explanation:

4 0
3 years ago
A searchlight uses a parabolic mirror to cast a beam of light in parallel rays where the light bulb is located at the focus of t
Vitek1552 [10]

Answer:

the third option

Step-by-step explanation:

Our equation is

{y}^{2}  = 36(x - 10)

Equation of a vertical parabola is

( {y - k)}^{2}  = 4p(x  - h)

where (h,k) is the center

The focus is

(h+p, k)

Equation of directrix is

x= h-p,

Here the center is (10,0)

Next, we factor out 4 in the original equation

4(9)

So we have

{y}^{2}  = 4(9)(x - 10)

So our p=9,

So our focus is

(10+9,0) or (19,0)

The third option is the answer

3 0
2 years ago
A woman bought a number of items for $24. She realized that if she had bought 4 more items for
Roman55 [17]

Answer:

The woman bought 2 items at $12 each.

Step-by-step explanation:

Given that a woman bought a number of items for $ 24, and she realized that if she had bought 4 more items for the same money, she would have paid $ 8 less per item, to determine how many Items did she buy the following calculation must be done:

X = 24

X + 4 = 24

24/2 = 12

24/6 = 4

12 - 4 = 8

Therefore, the woman bought 2 items.

3 0
3 years ago
Solve the inequality |6x + 2| < 10 and graph its solution.
mars1129 [50]
This is a modulus inequality.
First part: when (6x + 2) is positive
6x + 2 < 10
6x < 10 - 2
6x < 8
x < 8/6
x < 4/3

Second part: when (6x + 2) is negative.

-(6x + 2) < 10   Divide both sides of inequality by -1 and change the sign.

  (6x + 2) > -10
   6x + 2 > -10
   6x > -10 - 2
   6x > -12        Divide both sides by 6.
     x > -12/6
     x > -2.

Combined solution:   x < 4/3  and x > -2

  -2 < x < 4/3.

Graph is a line on the number line between -2 and 4/3.  
 
-2 and 4/3 are excluded from solution.
8 0
3 years ago
does the amount of water you can fit in a aquarium relfect the volume or the surface area of an aquarium?​
scoundrel [369]

Answer:

<h2>Volume!</h2>

Step-by-step explanation:

it the amount of space that can be occupied

7 0
3 years ago
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