PLEASE HELP!!!

2 answers:

7 0

Y is usage so set y to 0 and solve for x

y = -10x+100

0 = -10x +100
subtract 100 from each side:
-100 = -10x

divide both sides by -10

x = -100 / -10

x = 10 hours

garri49 [273]3 years ago

4 0

Using the equation -10x + 100, then the answer has to be 10 hours.

This is because -10 times 10= -100 and -100+100= 0

By the time he uses his phone for 10 hours the battery level will be at 0%.

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What is the rate of A, what is the rate of B, which equation has a greater rate?

11Alexandr11 [23.1K]

Answer: Rate of A: 5/6

Rate of B: 3/5

A has a higher rate of change

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5 0

3 years ago

25p+1t=51 solve for t

irga5000 [103]

Answer:

t = 51 - 25p

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

Step-by-step explanation:

Step 1: Define

Identify

25p + 1t = 51

Step 2: Solve for t

[Subtraction Property of Equality] Subtract 25p on both sides: 1t = 51 - 25p
Simplify: t = 51 - 25p

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3 years ago

Help please I’ll give you 25 points

Ira Lisetskai [31]

Answer: Choice D) $y = \pm \sqrt{x+5}$

The steps to finding the inverse will have us swap x and y. Afterward, we solve for y

$y = x^2 - 5 \\\\x = y^2 - 5 \\\\x+5 = y^2 \\\\y^2 = x+5 \\\\y = \pm \sqrt{x+5} \\\\$

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Extra info:

The inverse relation is not a function because of the plus minus. For instance, plugging x = 4 into $y = \pm \sqrt{x+5}$ leads to y = -3 and y = 3 simultaneously. You would have to apply a domain restriction on $y = x^2-5$ to make it a one-to-one function, to make the inverse a function. One possible domain restriction is $x > 0$ which would lead to the inverse function $y = \sqrt{x+5}$