All categories

3 years ago

HELP PLEASE I NEED IT ASAP IT WILL MEAN A LOT TO ME!!

Mathematics

1 answer:

podryga [215]3 years ago

7 0

Answer:

x=8.499

y=0.167

Step-by-step explanation:

the equation says:x^2-9y^2=72....(1)

x+3y=9.......(2)

divide (2) from (1),it becomes:

x-3y=8

making x subject of formula,

x=8+3y....(3)

submitting (3) into (1),it becomes

(8+3y)^2-9y^2=72

64+48y=72

48y=72-64=8

y=8/48=0.167......(4)

submitting (4) into (2),it becomes

x+3(0.167)=9

x+0.501=9

x=9-0.501

x=8.499

You might be interested in

An equilateral triangle with side length 1 cm is shown in the diagram, work out the area of the triangle.

tatyana61 [14]

Answer:

1/2 cm

Step-by-step explanation:

3 0

3 years ago

Below is data about the labor market in the state of Northwoods. Wage Quantity Demanded Quantity Supplied $10 80,000 120,000 $9

Mars2501 [29]

Answer:

So the number of people who would be unemployed is 111111.

Step-by-step explanation:

We calculate the total number of people and how much money they will need:

$200000\cdot 10\$=2000000\$\\\\200000\cdot 9\$=1800000\$\\\\200000\cdot 8\$=1600000\$\\\\200000\cdot 7\$=1400000\$\\\\200000\cdot 6\$=1200000\$\\$

So the total number of people receiving a salary is 1000000.

A total of $ 8000000 is required for their salaries.

If the minimum wage is $ 9, we get:

$8000000:9=888888.8\\\\\\1000000-888888.8=111111.2\\$

So the number of people who would be unemployed is 111111.

4 0

4 years ago

Which of the following of ordered pairs represent a function?

Julli [10]

A represents a function because each of the input values {-5, -2, 2, 5} has one and only one output (y-) value associated with it.

The same could be said of B: Each of the four input values {4, 3, 9, 11} has one and only one output (y-) value associated with it.

Thus, in both cases the given relations are also functions.

7 0

3 years ago

Luca has a box of dog toys. There are 3 bones, 5 balls, and a stuffed animal. What is the ratio of balls to stuffed animals?

Anna007 [38]

The answer would be D. 1:5 since there is 1 stuffed animal and 5 balls.

5 0

3 years ago

I NEED HELP ASAP PLEASE!!!

julsineya [31]

The answer is if 5(3x - 7 ) = 20 than 6x - 8 is 2(3x - 4) You get this answer when you factor it.

8 0

3 years ago