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NikAS [45]
3 years ago
6

Show that x = -2 is a solution of 3x² + 13x + 14 = 0​

Mathematics
1 answer:
Oliga [24]3 years ago
3 0

Answer:

x= -2 is correct answer

Step-by-step explanation:

3(-2×-2)+13(-2)+14=0

3(4)+13(-2)+14=0

12+(-26)+14=0

12-26+14=0

12+14-26=0

26-26=0

0=0

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There are 35 females performed in a dance recital.The ratio of men to women is 3 : 8. How many men are in the dance recital
Ipatiy [6.2K]

Answer:

13 or 13.125 you have to look at your notes to see which it is. Personally I would take 13. Try that first.

Step-by-step explanation:

Be careful how you interpret this question. It reads like this.

3:8 :: x:35

In other words, the 8 and 35 females goes together.

Set this up as a proportion

3/8 = x / 35  Cross multiply

3*35 = 8x     Combine the left

105 = 8x       Switch

8x = 105        Divide by 8

x = 105 / 8     get the answer

x = 13.125       You cannot have 1/8 of a person. So what are you going to do?

You have to round down. x = 13. How close is this

13/35 = 0.371 as apposed to 0.375 which is what 3/8 is.


8 0
3 years ago
What is the best first step for solving the equation 5 = 3x - 4? a. Add 4 to both sides of the equation. b. Subtract 4 from both
Brut [27]

Answer:

A. Add 4 to both sides of the equation.

Step-by-step explanation:

Isolate your variable by using inverse operations.

4 0
3 years ago
Suppose the population of the world now is 4 billion and its doubling period is
OleMash [197]

Answer:

4096b after 350 years, 4194304b after 700 years, and 4294967296b after 1050 years. 0.000433065 sq ft. per person after 1050 years making earth uninhabitable.

8 0
3 years ago
What is the decimal number of 100/2​
Marina86 [1]
I think it might be 50? unless you meant 2/100, which is 0.02
4 0
2 years ago
Choose the correct answer choice.
Dafna1 [17]

Answer:

The T shirt choice

Step-by-step explanation:

Both values increase at the same rate therefore is proportional.

7 0
3 years ago
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