2 years ago

F(x)=x^2-3x-21 is divided by x+4

Mathematics

2 answers:

AlladinOne [14]2 years ago

6 0

By factor theorem, f(-4)=7,therefore x+4 is not a factor of f..and remainder when decided by x+4 is 7

emmainna [20.7K]2 years ago

3 0

By factor theorem, f(-4)=7,therefore x+4 is not a factor of f..and remainder when decided by x+4 is 7

You might be interested in

Triangular a Recallyuldl

kramer

i got 28cm.... But im not sure

5 0

2 years ago

Harry bought a sweater that only cost $5 when it normally costs $35. What percent was the discount? Provide an explanation. A. 1

erastova [34]

Answer:

D. 85.7%

Step-by-step explanation:

its figuring out the percentage decrease

so you would go

35-5= 30

30/35 x 100 = 85.7

8 0

2 years ago

Read 2 more answers

What is 8,489÷9.This is 50 points question

s2008m [1.1K]

943.222222222222222222 (the 2 repeats) and it is rounded to 943.

5 0

2 years ago

Read 2 more answers

Which function is a shrink of the exponential growth function shown on the graph?

fgiga [73]

The exponential function shown in the graph is 3^x, so (1/2)3^x is a shrink of it.

Selection B is appropriate.

3 0

2 years ago

Read 2 more answers

En un triángulo rectángulo A es un ángulo agudo y Sen A = 4/5 ¿Cuál será el valor de Tan A?

Nonamiya [84]

Answer:

$\displaystyle \tan A=\frac{4}{3}$

Step-by-step explanation:

<u>Funciones Trigonométricas</u>

La identidad principal en trigonometría es:

$sen^2A+cos^2A=1$

Si sabemos que A es un ángulo agudo (que mide menos de 90°), su seno y coseno son positivos.

Dado que Sen A = 4/5, calculamos el coseno:

$cos^2A=1-sen^2A$

Sustituyendo:

$\displaystyle cos^2A=1-\left(\frac{4}{5}\right)^2$

$\displaystyle cos^2A=1-\frac{16}{25}$

$\displaystyle cos^2A=\frac{25-16}{25}$

$\displaystyle cos^2A=\frac{9}{25}$

Tomando raíz cuadrada:

$\displaystyle cos\ A=\sqrt{\frac{9}{25}}=\frac{3}{5}$

La tangente se define como:

$\displaystyle \tan A=\frac{sen\ A}{cos\ A}$

Substituyendo:

$\displaystyle \tan A=\frac{\frac{4}{5}}{\frac{3}{5}}$

$\displaystyle \tan A=\frac{4}{3}$

6 0

2 years ago