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3 years ago

Help!!! √−100 = + i

Mathematics

1 answer:

Naily [24]3 years ago

4 0

Answer:

-10i

10i

Step-by-step explanation:

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Please answer for a brainliest

HACTEHA [7]

Answer:

$x = 5$

$y = - 5$

Step-by-step explanation:

Look at the second equation.

Add 6y to both sides:

$- 6x = 6y$

Hence,

$y = - x$

Substitute this into first equation:

$- 4x - x = - 25$

$- 5x = - 25$

$x = 5$

Since y = -x,

$y = - 5$

8 0

3 years ago

What us the unit price of 32 ounces of yogurt that cost 4.79$

nadezda [96]

Do you mean the cost per ounce?
Then that would be $0.1496, or rounded to the nearest cent, 15 cents a ounce.

5 0

4 years ago

Find the value of x. Round to the nearest tenth.

denpristay [2]

Answer:

$\displaystyle x \approx 38.2 ^{\circ}$

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
Subtract Property of Equality

Pre-Calculus

Law of Sines: $\displaystyle \frac{sin(A)}{a} =\frac{sin(B)}{b} =\frac{sin(C)}{c}$

A, B, C are angle measures
a, b, c are leg lengths

Step-by-step explanation:

Step 1: Identify

A = 27°, a = 11

B = x°, b = 15

Step 2: Solve for x

Substitute [LOS]: $\displaystyle \frac{sin(27^{\circ})}{11} =\frac{sin(x^{\circ})}{15}$
Cross-multiply: $\displaystyle 11sin(x^{\circ}) = 15sin(27^{\circ})$
Isolate x term: $\displaystyle sin(x^{\circ}) = \frac{15sin(27^{\circ})}{11}$
Isolate x: $\displaystyle x = sin^{-1}(\frac{15sin(27)}{11})$
Evaluate: $\displaystyle x = 38.2488 ^{\circ}$
Round: $\displaystyle x \approx 38.2 ^{\circ}$