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3 years ago

Help please..??? =) =)

Mathematics

2 answers:

Phoenix [80]3 years ago

4 0

Answer:

1 1/4

Step-by-step explanation:

blagie [28]3 years ago

4 0

Answer:

1 1/4 hours

Step-by-step explanation:

To solve, we can divide the number of hours she has by the number of chores she has

hours/chores

She has 5 hours and 4 chores, so we can substitute those numbers in

5/4

1 1/4 or 1.25

She has 1 1/4 hours to complete each chore, so choice 3 is correct

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What does relationship mean in algebra/ math?

NikAS [45]

Answer:

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3 years ago

Sue has $2.10 in dimes and nickels. If she has 12 more dimes than nickels, how many of each coin does she have?

Andreas93 [3]

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nickels: 9

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3 years ago

John bought a cell phone for $99 and the %7 sales tax was added at the register. John gave the cashier six $20 bills, how much c

lord [1]

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3 years ago

Read 2 more answers

Urgent. Please show all work

myrzilka [38]

Answer:

$\displaystyle f'(x) = \frac{4}{x^2}$

General Formulas and Concepts:

Calculus

Limits

Limit Rule [Variable Direct Substitution]: $\displaystyle \lim_{x \to c} x = c$

Differentiation

Derivatives
Derivative Notation

The definition of a derivative is the slope of the tangent line: $\displaystyle f'(x) = \lim_{h \to 0} \frac{f(x + h) - f(x)}{h}$

Step-by-step explanation:

Step 1: Define

Identify.

$\displaystyle f(x) = -\frac{4}{x}$

Step 2: Differentiate

[Function] Substitute in x: $\displaystyle f(x + h) = -\frac{4}{x + h}$
Substitute in functions [Definition of a Derivative]: $\displaystyle f'(x) = \lim_{h \to 0} \frac{-\frac{4}{x + h} - \big( -\frac{4}{x} \big)}{h}$
Simplify: $\displaystyle f'(x) = \lim_{h \to 0} \frac{4}{x(x+ h)}$
Evaluate limit [Limit Rule - Variable Direct Substitution]: $\displaystyle f'(x) = \frac{4}{x(x+ 0)}$
Simplify: $\displaystyle f'(x) = \frac{4}{x^2}$