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2 years ago

May I please receive help?

Mathematics

1 answer:

mestny [16]2 years ago

4 0

Answer:

Arc=4 $\pi$

Step-by-step explanation:

The formula to get the length of arc is

Arc= degree x $\pi$ /180 x radius

Going by this formula, we can plug in a few numbers:

Arc= 80 x $\pi$ /180 x 9

Since it says to go off of term pi, we can simplify the 80 and the fraction and simplify.

Arc=80 $\pi$ /180 x 9

Arc=4 $\pi$ /9 x 9

Simplify, the nine cancels out

Arc=4 $\pi$

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Convert 39°C to degrees Fahrenheit.

posledela

Given a temperature C in celsius, you can convert it to Fahrenheit by using the formula

$F=32 + \dfrac{9C}{5}$

In your case C=39, so you have

$F = 32 + \dfrac{9\cdot 39}{5} = 32+70.2=102.2$

6 0

2 years ago

The students in a class were each asked to name their favorite meal of the day. Which table could be represented by percentage b

sineoko [7]

Answer:

Step-by-step explanation:

I say G because when you look at the bar, the maximum is 100% and G is 20 in total. Therefore, the maximums are the same types and both can be divided by 10.

7 0

3 years ago

Read 2 more answers

Need help someone please help me

Margaret [11]

Answer:

Its a i just took the test

Step-by-step explanation:

4 0

3 years ago

Help I cannot figure this question out.

netineya [11]

Answer:

B. x = -1 ± i

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

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

Algebra II

Imaginary Numbers: √-1 = i

Step-by-step explanation:

Step 1: Define

x² + 2x = -2

Step 2: Identify Variables

Rewrite Quadratic in Standard Form [Addition Property of Equality]: x² + 2x + 2 = 0
Break up Quadratic: a = 1, b = 2, c = 2

Step 3: Solve for x

Substitute in variables [Quadratic Formula]: $\displaystyle x=\frac{-2 \pm \sqrt{2^2-4(1)(2)}}{2(1)}$
[√Radical] Evaluate exponents: $\displaystyle x=\frac{-2 \pm \sqrt{4-4(1)(2)}}{2(1)}$
Multiply: $\displaystyle x=\frac{-2 \pm \sqrt{4-8}}{2}$
[√Radical] Subtract: $\displaystyle x=\frac{-2 \pm \sqrt{-4}}{2}$
[√Radical] Factor: $\displaystyle x=\frac{-2 \pm \sqrt{-1}\sqrt{4}}{2}$
[√Radicals] Simplify: $\displaystyle x=\frac{-2 \pm 2i}{2}$
Factor: $\displaystyle x=\frac{2(-1 \pm i)}{2}$
Divide: $\displaystyle x = -1 \pm i$