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3 years ago

WILL MARK BRAINLIEST!

Mathematics

2 answers:

nadya68 [22]3 years ago

4 0

Answer:

Step-by-step explanation:

-5x-y=5 since its substitution, take the equation that has the variables on

x=7y-1 opposite sides(x-7y-1) and sub in whats on the opposite side of the

-5(7y -1)-y=5 equal sign (7y-1) in for the x variable in the first equation

-35y+5-y=5. then you distribute the -5 to every value in the parenthesis

-36y=0 then you isolate the remaining variable on one side

y=0 then divide until the variable has no coefficiant

-5x-0=5 then you plug that value back in to the first equation

-5x=5 isolate the variable again

x=-1 then divide again. your y value is 0 and your x value is -1

SVEN [57.7K]3 years ago

3 0

Answer: x = - 1 and y = 0

Step-by-step explanation:

I've attached the answer

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A dance class consists of 22 students, of which 10 are women and 12 are men. if 5 men and 5 women are to be chosen and then pair

OverLord2011 [107]

solution:

I choose 5 women from a pool of 10 in 10C2 ways.

I choose 5 men from a pool of 12 in 12C2 ways.

So total number of ways of choosing in 10C2 x 12C2. Now I need to arrange them in 5 pairs. This is where I have a different solution. The solution says that there are 5! ways to arrange them in pairs.

But I cant seem to understand why? My reasoning is that for first pair position I need to choose 1 man from 5 and 1 woman from 5. So for the first position I have 5 x 5 choices (5 for man and 5 for woman). Similarly for the second position I have 4 x 4 choices and so on. Hence the total ways are 5! x 5!

So I calculate the total ways as 10C2 * 12C2 * 5! * 5!. Can anyone point the flaw in my reasoning for arranging the chosen men and women in pairs.

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4 years ago

Angela lives in the United States. She went on a trip, flying first to London, then to Paris, then back to the United States. As

kobusy [5.1K]

$\bf \begin{array}{ccll} dollar&po und\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
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3 years ago

How do you simplify -(5x+1)

Roman55 [17]

-1(5x+1)
-5x-1
the (-) in front is just a short way to put (-1)

6 0

4 years ago

Estimate the slope of the tangent line to the curve f(x) = x2 at the point (1, f(1)) by examining the trend in the secant slopes

Ilya [14]

Answer:

f'(1) = 2

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Function Notation

Calculus

The definition of a derivative is the slope of the tangent line.

Derivative Notation

Basic Power Rule:

f(x) = cxⁿ
f’(x) = c·nxⁿ⁻¹

Step-by-step explanation:

Step 1: Define

f(x) = x²

Point (1, f(1))

Step 2: Differentiate

Basic Power Rule: f'(x) = 2 · x²⁻¹
Simplify: f'(x) = 2x

Step 3: Find Slope

Use the point (1, f(1)) to find the instantaneous slope

Substitute in x: f'(1) = 2(1)
Multiply: f'(1) = 2

This tells us that at point (1, f(1)), the slope of the tangent line is 2. We can write an equation using point slope form as well: y - f(1) = 2(x - 1)

8 0

3 years ago

PLEASE HELP ASAP!!!!!!

nexus9112 [7]

D

Step by Step
Find the area of each shape
Triangle, 7x10
Then 70/2=35

Semicircle
1/2(3.14r squared)
Radius = 5
1/2(3.14x5 squared)
1/2(3.14x25)
1/2(78.5)
39.25

So, 35+39.25=74.25

4 0

1 year ago

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