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makvit [3.9K]
2 years ago
15

Evaluate the function. f(x) = -2x² + 2x – 20 Find f(-8)

Mathematics
1 answer:
Inessa [10]2 years ago
6 0
-2(-8^2) +2(-8) - 20
-2(64) - 16 -20
-128 - 36
-164
you answer is -164
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(7x²+8+5)+(3x²-2x-2) add polynomials​
eimsori [14]

Answer:

10x²+11-2x

Step-by-step explanation:

I hope you mean 7x²+8+5, not 7x²+8x+5.

We need to combine like terms. Anything with squared should be added together, et cetera.

(7x²+8+5)+(3x²-2x-2)

You can take out the parenthesis, because they don't matter in addition.

7x²+8+5+3x²-2x-2

Add the terms, step by step. Each bold pair needs to be added together.

7x²+8+5+3x²-2x-2

10x²+8+5-2x-2

10x²+11-2x

Now there's no more we can add together.

3 0
3 years ago
Jocelyn Clinton works for a company that uses a percentage method to compute income tax withheld. Jocelyn is single and claims o
Veronika [31]
Jocelyn makes more than $195 but not over $645. The amount she has to pay is 15% of the excess of 196. Find this first via subtraction.

421 - 195 = $226 over 

Take 15% of this

226 x .15 = $33.9

The tax also includes a $14.4 addition to this 15%.

33.9 + 14.4 = $48.3 total income tax
6 0
3 years ago
5n(3n+8) ..? I don't understand
SSSSS [86.1K]
You have ti distribute the 5n into the brackets. 

so then youll have 15n^2 + 40n. 
5 0
3 years ago
Z
timofeeve [1]

Answer:

Z

ㄲ

Respuesta: se necesitan 15 casos para las 4 lámincis.

El primer 3 indica los 3 clavos para el lado izquierdo de la primera lámina. los números del L...4

indican el número de laminas, y el segundo 3 indica el número de claves para el lado derecho de

cada lamina.

lámina y se calcula

A mumero de casos se obtiene relacionando el número de liminas con la cantidad de clavos per

3 + nuncro deliminas) X 3

Cuilice si patria numérico anterior para encontrar la cantidad de clavos necesarios según el número

b. 6 laminas

10 Sáminas

0.

-se de forma física bien identificados.

5: Leer el contenido de la presente guía, realizar las

FECHA: 06 al 17 septiembre 2021

Tercel CUMP

E de liminas

a

Liminas

C.

8 0
3 years ago
Help ;-; me please;-;
Diano4ka-milaya [45]

Answer: 13 is c im pretty sure and 14 is a im think hope fully it helps

Step-by-step explanation:

8 0
3 years ago
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