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3 years ago

Solve the system of equations 2x+4y=6 and 5y-2x=10

Mathematics

2 answers:

Aloiza [94]3 years ago

7 0

Answer:

1. x=−2y+3

2. $\frac{5}{2} y - 5$

Step-by-step explanation:

Leokris [45]3 years ago

5 0

Step-by-step explanation:

2x+4y = 6

-2x +5y = 10

9y = 16

y = 16/9

2x+ 4(16/9) = 6

2x +64/9 = 54/9

2x = -10/9

x = -5/9

wow those are ugly numbers

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The side lengths of a rectangle are described as (2x−3) inches and (5x+7) inches.

anastassius [24]

Answer:

(a) 10x^2−x−21

Step-by-step explanation:

The area of a rectangle is given by the formula ...

A = LW . . . . . where L is the length, and W is the width

The area of the given rectangle will be ...

A = (2x -3)(5x +7)

This product is simplified using the distributive property to eliminate parentheses. Then like terms are combined.

A = 2x(5x +7) -3(5x +7)

= (2x)(5x) +(2x)(7) -3(5x) -3(7)

= 10x^2 +14x -15x -21

A = 10x^2 -x -21

The expression 10x^2 -x -21 represents the area of the rectangle in square inches.

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2 years ago

The bids in an online auction are represented by the arithmetic sequence shown below. Write an explicit formula to represent the

sesenic [268]

Answer:

aₙ = 207+9*(n-1)

Step-by-step explanation:

a1 = 207+9*(1-1) = 207

a2 = 207+9*(2-1) = 216

a3 = 207+9*(3-1) = 225

....

aₙ = 207+9*(n-1)

7 0

3 years ago

There are 40 students in a class. Three-fifths (1/5) of the students are boys.

horsena [70]

Answer:

a) 24

b) 16

Step-by-step explanation:

a) Total Students = 40

Boys= 40*(3/5) = 24

b) Total Students= 40

Boys= 24

Girls= (40-24) = 16

4 0

3 years ago

How do you put f(8)=-1,f(6)=0 into point slop form?

Mademuasel [1]

Answer:

y + 1 = -1/2(x - 8)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Point-Slope Form: y - y₁ = m(x - x₁)

x₁ - x coordinate
y₁ - y coordinate
m - slope

Step-by-step explanation:

Step 1: Define

f(8) = -1 → Coordinate (8, -1)

f(6) = 0 → Coordinate (6, 0)

Step 2: Find slope m

Substitute [SF]: $m=\frac{0+1}{6-8}$
Add/Subtract: $m=\frac{1}{-2}$
Simplify: $m=\frac{-1}{2}$

Step 3: Write Function

Substitute into general form.

Point 1: y + 1 = -1/2(x - 8)
Point 2: y = -1/2(x - 6)

4 0

3 years ago

Write an equation that represents a relationship that is not proportional when m= 3 and b= -6.

Rainbow [258]

Answer:

y=3x+-6

Step-by-step explanation:

plug it into y=mx+b form

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mark brainiest pls

4 0

2 years ago