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iragen [17]
2 years ago
8

How do you evaluate expressions

Mathematics
1 answer:
Ilya [14]2 years ago
8 0

Answer:

you can evaluate an expression by solving for x

Step-by-step explanation: for example

6x=12

you would divide by six by both sides

= to 6


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What is the answer to this problem -2x – 4 < 3x + 21
horsena [70]

Start with

-2x-4 < 3x+21

Add 2x to both sides:

-4 < 5x+21

Subtract 21 from both sides:

-25 < 5x

Divide both sides by 5. Since it is positive, we don't have to change the inequality sign:

-5 < x

So, the answer is x > -5


6 0
2 years ago
Perform the indicated operation.<br><br> (2x + 7)(x – 5)<br> Answers <br> Below in the picture
Over [174]

i thought it was a or d

6 0
3 years ago
Read 2 more answers
Solve the system of linear equations by substitution.
Goryan [66]

Answer:

hey! This was the only part of mathematics I ever enjoyed! So consider this both of our lucky days: Answer is : (2,7)

Step-by-step explanation:

basically plug in Y to the first equation as sox + 4(-x + 9) = 30

x - 4x + 36 = 30- 3x = - 6

x = 2

then plug that in to Y!

Y = -(2) + 9

so Y = 7

and our answer is : (2,7)

6 0
3 years ago
Read 2 more answers
I don't get how to work out the repeating problems, could someone explain please?
barxatty [35]
Detecting...

Your answer would be:

0.025 = 1/40 &#10;&#10;0.025/1 * 1000/1000 = 25/1000&#10;&#10;25 \div 25 / 1000 \div 25 = 1/40&#10;&#10;1/40 is your answer.
3 0
3 years ago
Due to conservation efforts, the gray whale has been removed from the endangered species list. There are now 13,000 in the world
brilliants [131]

Answer:

P = 13,000(1.11) ^ t

Step-by-step explanation:

This scenario can be modeled using an exponential growth equation.

The exponential growth equations have the following form:

P = p (1 + r) ^ t

Where P is the population in year t

p is the initial population at t = 0

r is the growth rate

t is the time in years.

In this case we know that the current population is 13,000 and that the growth rate is 11%

So

p = 13,000\\r = 0.11

The equation that models this scenario is:

P = 13,000(1 + 0.11) ^ t

P = 13,000(1.11) ^ t

4 0
2 years ago
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