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2 years ago

What is this (please)

Mathematics

2 answers:

REY [17]2 years ago

7 0

Answer:

A) y=-4/5

Step-by-step explanation:

When you have two fractions equal to one another, the easiest thing is often to cross multiply. To do this, multiply the top of the left fraction by the bottom of the right fraction, and then multiply the bottom of the left fraction by the top of the right side and put them equal to eachother:

$\frac{a}{b} = \frac{c}{d} \\ad=bc$

Knowing this, and some algebra, we can solve the question:

$\frac{7y+4}{y+2} =\frac{-4}{3}$

(7y+4)(3)=(y+2)(-4)

21y+12=-4y-8

21y+4y=-8-12

25y=-20

y=-4/5

artcher [175]2 years ago

5 0

A) Y= -4/5
Hope that helps!!!

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Find the are of this compound shape below *

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Answer:

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Step-by-step explanation:

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2 years ago

Dress works in a factory that makes combs. He discovered that out of 500 combs, 34 of those are defective. If the factory produc

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3 years ago

Please help! acellus

ch4aika [34]

Answer:

The number that belongs in the green box is equal to 909.

General Formulas and Concepts:
Algebra I

Equality Properties

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

Trigonometry

[Right Triangles Only] Pythagorean Theorem:
$\displaystyle a^2 + b^2 = c^2$

a is a leg
b is another leg
c is the hypotenuse

Step-by-step explanation:

Step 1: Define

Identify given variables.

a = 30

b = 3

c = x

Step 2: Find x

Let's solve for the general equation that allows us to find the hypotenuse:

[Pythagorean Theorem] Square root both sides [Equality Property]:
$\displaystyle \begin{aligned}a^2 + b^2 = c^2 \rightarrow c = \sqrt{a^2 + b^2}\end{aligned}$

Now that we have the formula to solve for the hypotenuse, let's figure out what x is equal to:

[Equation] Substitute in variables:
$\displaystyle \begin{aligned}c & = \sqrt{a^2 + b^2} \\x & = \sqrt{30^2 + 3^2}\end{aligned}$
Evaluate:
$\displaystyle \begin{aligned}c & = \sqrt{a^2 + b^2} \\x & = \sqrt{30^2 + 3^2} \\& = \boxed{ \sqrt{909} } \\\end{aligned}$

∴ the hypotenuse length x is equal to √909 and the number under the square root, our answer, is equal to 909.

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Learn more about Trigonometry: brainly.com/question/27707750

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Topic: Trigonometry

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2 years ago