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3 years ago

I need help pleassssseeeee?

Mathematics

1 answer:

katen-ka-za [31]3 years ago

3 0

8π²

2πr² is the equation to find the base, but the answer doesn't ask for the exact awsner, rather the expanded version. 4 is the radius, radius x 2 is 8.

8π²

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Melanie equally shares 25 meters of paper to create 9 banners

Dvinal [7]

Question: Which situation is represented by $\frac{25}{9}$ ?

Option A: Melanie equally shares 25 meters of paper to create 9 banners

Option B: Quill gives way 9 baseball cards from a pack of 25 cards.

Option C: George invites 25 kids and 9 adults to his birthday party.

Option D: Becca create 9 rows with 25 buttons.

Answer:

Solution:

Option A: Melanie equally shares 25 meters of paper to create 9 banners.

The fraction is $\frac{25}{9}$ .

Option B: Quill gives way 9 baseball cards from a pack of 25 cards.

The fraction is $\frac{9}{25}$

Option C: George invites 25 kids and 9 adults to his birthday party.

Here, 25 + 9.

Option D: Becca create 9 rows with 25 buttons.

Here, 9 × 25.

Hence the answer is Option A: Melanie equally shares 25 meters of paper to create 9 banners.

7 0

3 years ago

Solve using the quadratic formula 2x^2+x+67=0

telo118 [61]

Answer:

$\displaystyle x=\frac{-1 \pm i\sqrt{535}}{2}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Multiple Roots
Standard Form: ax² + bx + c = 0
Quadratic Formula: $\displaystyle x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$

Algebra II

Imaginary Root i = √-1

Step-by-step explanation:

Step 1: Define

Identify

2x² + x + 67 = 0

a = 2

b = 1

c = 67

Step 2: Solve for x

Substitute in variables [Quadratic Formula]: $\displaystyle x=\frac{-1 \pm \sqrt{1^2-4(2)(67)}}{2(1)}$
Multiply: $\displaystyle x=\frac{-1 \pm \sqrt{1^2-4(2)(67)}}{2}$
[√Radical] Evaluate exponents: $\displaystyle x=\frac{-1 \pm \sqrt{1-4(2)(67)}}{2}$
[√Radical] Multiply: $\displaystyle x=\frac{-1 \pm \sqrt{1-536}}{2}$
[√Radical] Subtract: $\displaystyle x=\frac{-1 \pm \sqrt{-535}}{2}$
[√Radical] Simplify: $\displaystyle x=\frac{-1 \pm i\sqrt{535}}{2}$