1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
cestrela7 [59]
3 years ago
14

What is the solution to 2x+12=5x-9

Mathematics
2 answers:
Sindrei [870]3 years ago
8 0
2x+12=5x-9\ \ \ \ |combine\ like\ terms\\\\2x-5x=-9-12\ \ \ \ \ |simplify\\\\-3x=-21\ \ \ \ \ |:-3\\\\x=7
Wittaler [7]3 years ago
4 0
So 2x+12=5x-9
you want all of the unknowns on one side and all of  the known values on the other or
subtract 2x from both sides
12=3x-9
add 9 to both sides
21=3x
divide both sides by 3
7=x
You might be interested in
Figure 14-3
enot [183]
The answer is D. SIS idk how to do this
Ur welcome
5 0
3 years ago
32 athletes are going camping for the weekend. Three athletes can sleep in one tent. What is the minimum number of tents that wi
Yuliya22 [10]

Answer:

11

Step-by-step explanation:

6 0
3 years ago
Can anyone tell me why by direct substitution of x, the equation (circled ones) equals to the indeterminate form, 0/0? When you
Katena32 [7]

Answer:

See explanation and hopefully it answers your question.

Basically because the expression has a hole at x=3.

Step-by-step explanation:

Let h(x)=( x^2-k ) / ( hx-15 )

This function, h, has a hole in the curve at hx-15=0 if it also makes the numerator 0 for the same x value.

Solving for x in that equation:

Adding 15 on both sides:

hx=15

Dividing both sides by h:

x=15/h

For it be a hole, you also must have the numerator is zero at x=15/h.

x^2-k=0 at x=15/h gives:

(15/h)^2-k=0

225/h^2-k=0

k=225/h^2

So if we wanted to evaluate the following limit:

Lim x->15/h ( x^2-k ) / ( hx-15 )

Or

Lim x->15/h ( x^2-(225/h^2) ) / ( hx-15 ) you couldn't use direct substitution because of the hole at x=15/h.

We were ask to evaluate

Lim x->3 ( x^2-k ) / ( hx-15 )

Comparing the two limits h=5 and k=225/h^2=225/25=9.

3 0
3 years ago
What are the values of f(x) = 9^x when x= -2? <br><br> a) 1/81<br> b) 81<br> c) 1/18<br> d) 18
Novosadov [1.4K]

Answer:

(a)

Step-by-step explanation:

using the rule of exponents

• a^{-m} ⇔ \frac{1}{a^{m} }, hence

9^{-2} = \frac{1}{9^{2} } = \frac{1}{81} → (a)


4 0
3 years ago
Read 2 more answers
The relationship between a distance in yards (y) and the same distance in miles (m) is described by the equation y=1760m.
Vanyuwa [196]

Answer:

Step-by-step explanation:Introducing Graphs of Proportional Relationships ... The table represents the relationship between a length measured in meters and ... Find the constant of proportionality and write an equation to represent the relationship. ... in yards (y) and the same distance in miles (m) is described by the equation y=1760m.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Factor to write an equivalent expression: 26a - 10
    13·2 answers
  • Write a fraction that is lees than 5/6 and has a denominator of 8
    12·1 answer
  • Which juice container is larger 2 L or 1 gallon
    14·1 answer
  • Whats 100 times 1,002 times 54
    9·1 answer
  • Peaches are being sold for $2 per pound.The customer created a model to represent the total cost of peaches bought. If x represe
    13·2 answers
  • Please help me out!!!!!!!!
    8·1 answer
  • Hello ya'll. I have a quick question to ask ya'll.
    12·1 answer
  • (07.03 LC)
    13·1 answer
  • What is the simplest form of the expression?<br><br> V180 – 180 + 745
    11·1 answer
  • Both cases?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!