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Aleks04 [339]
4 years ago
13

Factor completely 49x2 − 81

Mathematics
2 answers:
nataly862011 [7]4 years ago
6 0
49x2 - 81
(7x - 9)(7x + 9)
slava [35]4 years ago
5 0

Answer:

(7x + 9)(7x -9)

Step-by-step explanation:

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Based on the equation...
adelina 88 [10]

6x + 2y = 30


When y=0


6x + 2(0) = 30


x = 30/6 = 5


Answer: 5, second choice



4 0
4 years ago
Read 2 more answers
Write a system of equations and solve. Three times the first number minus two times the second number equals -7. The second numb
Fynjy0 [20]

Answer:

  • -1 and 2

Step-by-step explanation:

Let the numbers be x and y

<u>Three times the first number minus two times the second number equals -7:</u>

  • 3x - 2y = -7

<u>The second number equals one less than negative three times the first number:</u>

  • y = -3x - 1

<u>Substitute y in the first equation and solve for x:</u>

  • 3x - 2(-3x - 1) = -7
  • 3x + 6x + 2 = -7
  • 9x = -9
  • x = -1

<u>Find the value of y:</u>

  • y = -3(-1) - 1
  • y = 3 - 1
  • y = 2

The numbers are -1 and 2

8 0
3 years ago
What is the sum of -19 and the product of 48 ?
IceJOKER [234]
It has to be -912 because i checked on a caculator
5 0
3 years ago
If a ball is thrown straight up into the air with an intial velocity of $$ ft/s, its height in feet after $$ seconds is given by
Andrej [43]

Answer:

i have a f in math

Step-by-step explanation:

4 0
3 years ago
What is 1/10 of 200
gladu [14]
1/10x200
= 1/10x200/1
= 200/10
=20

the answer is 20

if u dont understand, 1/10 means a part of 200 that is divided by 10 which means the number x10 =200. So if u dont understand, you can check answer this way: n*10=200

200/10=n
n= 20
8 0
4 years ago
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