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wariber [46]
3 years ago
13

Need help asap!!

Mathematics
1 answer:
In-s [12.5K]3 years ago
8 0

Answer:D

Step-by-step explanation:

(3x^3 - 5x^2 + 4x - 9)-(7x^3 - 8x^2 - 5x + 10)

open brackets

3x^3 - 5x^2 + 4x - 9 - 7x^3 + 8x^2 +5x - 10

Collect like terms

3x^3-7x^3-5x^2+8x^2+4x+5x-9-10

-4x^3+3x^2+9x-19

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8. The sum of two numbers is 8 less than twice the first number. Their difference is 4 less than twice
Delicious77 [7]

Answer:

14 and 6

Step-by-step explanation:

Let's start by naming the first number x.

We can name the second number y.

We can set up equations to model our situation.

x+y=2x-8

x-y=2y-4

Let's simplify the equations.

x+y=2x-8

Subtract 2x from both sides

-x+y=-8

__________

x-y=2y-4

Subtract 2y from both sides.

x-3y=-4

Add the two equations together to eliminate x.

x-3y=-4

-x+y=-8

________

0x-2y=-12

-2y=-12

Divide both sides by -2.

y=6

The second number is 6.

Plug that back in.

x+6=2x-8

Subtract x from both sides

6=x-8

Add 8 to both sides

x=14

The first number is 14

7 0
3 years ago
PLease help mee with these math questions, please.
Alex777 [14]

9^2 + B^2 = 18^2

81 + B^2 = 324

B^2 = 243

Square root 243

B =15.59

3 0
3 years ago
PLEASE ANSWER!!! Brainliest to whoever answers at first!Order the following expressions by their values from least to greatest.
Brilliant_brown [7]

Answer:

  -j, 0, j-k

Step-by-step explanation:

j is a positive number, so -j will be less than 0.

j is a number greater than k, so j - k will be greater than 0.

From least to greatest, the order is ...

  -j, 0, j-k

5 0
3 years ago
What is a+b=c if a is equal to b
swat32
If a = b then a + b = c is

2a = c

OR

2b = c
6 0
3 years ago
243%. X<br> _____= -----<br> 100. 23
Svetach [21]
5 over the power if two divide 6 from what you get and that is your answer
8 0
3 years ago
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