11. What values of a, b, and c make this equation true?

Mathematics

1 answer:

borishaifa [10]3 years ago

4 0

9514 1404 393

Answer:

A, a = 4, b = -3, c = 3

Step-by-step explanation:

Expanding the left side gives ...

2x^2 -x -10 +ax^2 +bx +c

= (2 +a)x^2 +(b -1)x +(c -10)

Equating coefficients with terms on the right side gives ...

x^2: (2 +a) = 6 ⇒ a = 4 . . . . . . eliminates choice C

x: (b -1) = -4 ⇒ b = -3 . . . . . . . . eliminates choices B, D

constant: c -10 = -7 ⇒ c = 3 . . . confirms choice A

You might be interested in

Daisy works at an ice-cream parlor. She is paid $10 per hour for the first 8 hours she works in a day. For every extra hour she

tester [92]

Answer:

The expression giving her net earnings for a day with more than 8 hours worked is X = 80 + 15H, where H means "extra hours worked".

Step-by-step explanation:

Given that Daisy works at an ice-cream parlor earning $10 per hour for the first 8 hours she works in a day, and 1.5 times her hourly wage for every extra hour she works, in order to know how much can she make in a day working more than 8 hours the following equation has to be made:

X = (8 x 10) + (H x (1.5 x 10))

X = 80 + 15H

Therefore, if Daisy works 13 hours, the equation works as follows:

X = 80 + 15x13

X = 80 + 195

X = 275

3 0

3 years ago

Need help ASAP!!!!!!!!!!!!

eimsori [14]

Answer:

8 small tables

Step-by-step explanation:

they told you they have 5 large tables that seat 10 guests and 98 guests are coming. You need to subtract 50 from 98 because after you multiple how many guests can sit at each large table by how many large tables they have it equals 50 so 98-50=48 then you need to divide 48 by six because each small table sits six people so 48/6=8 so you need 8 small tables.

6 0

3 years ago

What is the lateral area of the cylinder

Wewaii [24]