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faltersainse [42]
3 years ago
10

Math work plz, i just need to get an answer

Mathematics
2 answers:
Allushta [10]3 years ago
8 0
5x + 5y = 15
x = -y + 3

2x - 2y = 10
2(-y + 3) - 2y = 10
-2y + 6 -2y = 10
-4y = 4
y = -1

5x + 5y = 15
5x + 5(-1) = 15
5x -5 = 15
x = 4

the answer is (4,-1)
Neporo4naja [7]3 years ago
6 0
It is 10, and 15 I believe
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Raj builds a side table in the shape of a cube. Each edge of the cube measures 21 inches. Raj wants to cover the top and four si
elena-s [515]

Answer: 2000/25 = 80 tiles

Step-by-step explanation:

Date: s=20

equation of surface area of a cube prism: surface area = 6s*2

the surface area to be covered with tiles is requires, the base is not included, so the equation reduces: surface area = 5s*2

subtitute values: surface area = 5(20)*2

= 5(400)

surface area = 2000

area of 2 tile is 5*2 = 25 square inches

2000/25 = 80 tiles

5 0
3 years ago
A triangle has a perimeter of 77 inches. What are the side lengths of a, b, and c?
Yuki888 [10]

Answer:

I believe this is pathgorean theorem, which I did at the beginning of alegbra last year. It is basically finding the missing side of a triangle. (Trust me some of the easiest stuff you do all year) Below are my notes from last year. I hope it helps! Good Luck!!!

Step-by-step explanation:

Given two sides

If you know two other sides of the right triangle, it's the easiest option; all you need to do is apply the Pythagorean theorem:

a² + b² = c²

if leg a is the missing side, then transform the equation to the form when a is on one side, and take a square root:

a = √(c² - b²)  

if leg b is unknown, then

b = √(c² - a²)  

for hypotenuse c missing, the formula is

c = √(a² + b²)

6 0
3 years ago
Use the expressions that represent the length and width of the game board to write an equation that models the area of the figur
Ne4ueva [31]
The picture is incomplete and the width is missing.

I am going to show you how to do it using any width.

The length shown is x + 4 and the width starts with - x.

Assume the width is - x + a.

Then the area of the rectangle with dimensions x + 4 and - x + a is calculated in this way:

1) given: (x + 4) (- x + a)

2) use distribuitive property: (x)(-x) + (x)(a) + (4)(-x) + (4)(a)

= - x^2 +ax -4x + 4a

3) Combine like terms: - x^2 + (a -4)x + 4a

If the polynomial missing were - x + 7, the answer would be:

- x^2 + (7 -4)x + 4(7) = - x^2 + 3x + 28

With this you are able to get the answer using the real values.
3 0
3 years ago
$1000 earning 5.25% interest compounded annually for 3 years.
Schach [20]

Answer:

$1165.92

Step-by-step explanation:

1000*5.25%=52.5

1000+52.5=1052.5

1052.5*5.25%=55.26

1052.5+55.26=1107.76

1107.76*5.25%=58.16

1107.76+58.16=1165.92

I could b very wrong here tho XD

4 0
3 years ago
A television set manufacturing firm has to decide on the mix of color and black-and-white TVs to be produced. A market research
zhannawk [14.2K]

Answer:

Objective Function,  Max P =60c+30b

Subject to the Constraints

0

0

20c+15b\leq 60000

Step-by-step explanation:

Let the number of black t.v. produced =b

Let the number of colored t.v. produced =c

at most, 2000 units of color t.v. can be sold i.e. c\leq 2000

at most 4000 units of black-and-white TVs can be sold i.e. b\leq 4000

Total man hours per product = Number of Units X Man Hour Per Unit

A color TV requires 20 man-hours  = 20c

A black-and-white TV requires 15 man-hours =15b

Since Maximum number of man Hours is 60000 hours

20c+15b\leq 60000

The unit profits of the color TV is $60, therefore total profit =60c

The unit profits of the black-and-white TVs $30, respectively, therefore total profit =30b

Since we are to maximize profit, the Objective Function, Max P =60c+30b

3 0
3 years ago
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