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2 years ago

Please I need help on this

Mathematics

1 answer:

telo118 [61]2 years ago

6 0

Ok sorry for answering i will wait.

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Alex scored 70% in a spelling test with 20 quetions

amm1812

Answer:

This means that Alex answered 14 questions correctly

Step-by-step explanation:

Step 1: Find an equation

20 * 0.7 = x

Step 2: Multiply

20 * 0.7 = x

14 = x

Answer: This means that Alex answered 14 questions correctly

5 0

2 years ago

Read 2 more answers

How many teaspoons make up 40ml

mojhsa [17]

Answer:

Convert 40 Milliliters to Teaspoons

mL tsp

tsp40.01 8.1174

8.117440.02 8.1194

8.117440.02 8.119440.03 8.1215

8.117440.02 8.119440.03 8.121540.04 8.1235

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2 years ago

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Explain how to determine the zeros of f(x)=(x+3)(x-1)(x-8)

spin [16.1K]

Answer:

x=-3, x=1, x=8

Step-by-step explanation:

When you have to find the zero of an equation like (x+3) all you have to do is solve for x.

x+3=0 equal the equation to zero

x+3-3=0-3 cancel out 3

x=-3 answer

If you have to find the zero of an equation like f(x)=-2x^2 - 5x + 7 then you would have to factor the equation.

7*-2=-14 multiply

-7 & 2 find the two numbers that when multiplied =14 and when added = -5

(2x^2 + 2) (-7x + 7) replace -5 with -7 & 2

-2x (x - 1) -7 (x - 1) factor

(x - 1) (-2x - 7) rewrite

1st: x - 1 = 0

x = 1 : Answer

2nd: -2x - 7= 0

-2x - 7 + 7 = 0 + 7

-2x = 7

-2x / -2 = 7 / -2

x = 7 / -2 : Answer

7 0

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