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2 years ago

What is the solution to the following system of equations?

1 answer:

4 0

x+y=5
x-y=1
-------------add
2x = 6
x = 3

x+y=5
3+y=5
y = 2

solution
(3,2)

answer is c. (3, 2)

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Which value satisfies the inequality 5x + 7 ≤ 8x - 3 + 2x?

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Answer:

D) 2

Step-by-step explanation:

5x + 7 $\leq$ 8x -3 +2x

5x + 7 $\leq$ 10x - 3

7 + 3 $\leq$ 10x - 5x

10 $\leq$ 5x

2 $\leq$ x

x $\geq$ 2

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2 years ago

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1 year ago

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2 years ago

The ratio of boys to girls at Longwood High School is 6:7. There are 1,722 girls in the High School. Write and solve a proportio

DochEvi [55]

Answer:

1476 boys

Step-by-step explanation:

We are going to use ratio here:

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(1,722*6)/7 =

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3 0

2 years ago

Solve the quadratic equation below for the exact values of x. 4x² - 5 = 75

vfiekz [6]

Answer:

x = ±2√5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

Terms/Coefficients
Multiple Roots

Step-by-step explanation:

Step 1: Define

Identify

4x² - 5 = 75

Step 2: Solve for x

[Addition Property of Equality] Add 5 on both sides: 4x² = 80
[Division Property of Equality] Divide 4 on both sides: x² = 20
[Equality Property] Square root both sides: x = ±2√5

8 0

3 years ago

Read 2 more answers