-2x-9y=-25
-4x-9y=-23
Help ?!

Answers

Answer 1

Answer: Its solve the system of equations. you can do substitution or elimination.

There are two kinds of solving but elimination seems best for this system:

-2x-9y=-25
4x+9y=23 (multiplied it by -1 so you can eliminate the variable "Y")
---------------
2x=-2
x=-1 (divide by 2 on each side)

-2(-1)-9y=-25 (insert what you received for what "X" is)
2-9y=-25 (simplify)
-9y=-27 (subtract 2 on each side)
y=3 (divide each side by -9)

Answer 2

Answer: Turn them into y=mx+b form
(-2/9)x+25/9 and (-4/9)x+23/9.
Then equate them to each other
(-2/9)x+25/9=(-4/9)x+23/9
Then solve of x
(-2/9)x+(4/9)x = (23/9) - (25/9)
X = -1
Then plug in X and solve for y
Y = (-2/9)(-1) + (25/9)
Y= (27/9)
Y= 3
So your solution is (-1,3)

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Which inequality matches the graph? (2 points)A) −2x + 3y > 7

B) 2x − 3y < 7

C) −3x + 2y > 7

D) 3x − 2y < 7

Answers

Answer:

D) 3x − 2y < 7

Step-by-step explanation:

We note that the x- and y-intercepts are about 2.3 and -3.5, respectively.

In "intercept form," the equation of the line can be written ...

x/x-intercept +y/y-intercept = 1

Using the given intercepts, this is ...

x/2.3 +y/(-3.5) = 1

The answer choices suggest that we should multiply this by 7. When we do, we get ...

3x -2y = 7 . . . . the equation of the boundary line

The next trick is to figure the comparison symbol. We note that x-values are less than those on the line, and y-values are greater than those on the line. It is convenient to consider the term with a positive coefficient, so we don't get confused with minus signs and reversed comparisons.

As we said, x-values are less than those on the line, so the shaded area is ...

3x -2y < 7 . . . . matches choice D

Answer:

D) 3x − 2y < 7

Step-by-step explanation:

Took the test and got it right :)

Adult male heights are normally distributed with a mean of 70 inches and a standard deviation of 3 inches. The average basketball player is 79 inches tall. Approximately what percent of the adult male population is taller than the average basketball player?0.13%
0.87%
49.87%
99.87%

Answers

Given:
average height of a basketball player = 79 inches
μ = 70 inches
σ = 3 inches

standardize x to z = (x - μ) / σ
P(x > 79) = P( z > (79-70) / 3)
= P(z > 3) = 0.0013
0.0013 x 100% = 0.13%

0.13 % of the adult male population is taller than the average basketball player.

The Patels took out a 15-year mortgage. How many monthly payments will they have to make on this mortgage? A. 360
B. 60
C. 180
D. 90

Answers

There are 12 months in a year, and 15 years to pay the mortgage.

Therefore you are simply doing 12 multiplied by 15.

12 × 15
= 180

So your answer is C. 180

Final answer:

To calculate the total number of mortgage payments over a period of 15 years, one should multiply the number of years by 12. Thus, a 15-year mortgage will have 180 payments in total.

Explanation:

The Patels took out a 15-year mortgage. A mortgage is usually paid on a monthly basis. Therefore, to calculate the total number of payments the Patels will make, multiply the number of years by 12 - the number of months in a year. So, 15 years * 12 months/year equals 180 payments. Therefore, the correct answer is C. 180.

Learn more about Mortgage Payments here:

brainly.com/question/34218035

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Write a function perim that receives the radius r of a circle and calculates and returns the perimeter p of the circle (p = 2 * π * r). a) def perim(r): b) perim(r): c) def perim_circle(r): d) def calculate_perimeter(r):

Answers

Answer:

Write a function perim that receives the radius r of a circle, and calculates and returns the perimeter P of the circle (P = 2 π r). Here are examples of using the function:

>>perimeter = perim(5.3)

perimeter =33.3009

>>fprintf(‘The perimeter is %.1f\n’, perim(4))

The perimeter is 25.1

>>help perim

Calculates the perimeter of a circle

Renewable energy sources, such as biomass, are gaining increasing attention. Biomass energy units include megawatt hours (MWh) and gigajoules (GJ). One MWh is equivalent to 3.6 GJ. For example, 1 cubic meter of wood chips produces 1 MWh.

Step-by-step solution

Step 1 of 3

The perimeter of a circle is,

Here,

r is the radius of the circle and

P is the perimeter of the circle.

Chapter 3, Problem 25E is solved.

View this answer

View a sample solution

Corresponding textbook

MATLAB | 3rd Edition

9780124058767

ISBN:

0124058760

Authors:

Stormy Attaway

Rent | Buy

MATLAB

(3rd Edition)

Solutions for Chapter 3

Problem 25E: Write a function perim that receives

the radius r of a circle, and calculates and returns

the perimeter P of the circle (P = 2 π r). Here are …

Solutions for problems in chapter 3

Get solutions

7a – b = 15a, for a does anyone have a clue what this is

Answers

welp its kinda easy you are trying to get b so 7a-7a 15a-7a equals 8a

Im new here, Could anyone help me

How to solve a mixed fraction?

Answers

To solve a mixed fraction you will have to multiply the mixed number by the denominator then add the numerator for example:
7 3/4 you are gonna go 7x4=28 then you are gonna take that 28 and add 3 to it so it would be 31. I hope that helped some c:

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