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
Westkost [7]
3 years ago
13

How to solve 4x - 9 = 7x + 12

Mathematics
1 answer:
krek1111 [17]3 years ago
8 0
I hope this helps you


7x-4x = -9-12



3x=-21



x= -7
You might be interested in
Toby can but T-shirts in packs of 5 for 13.00 or in packs of 2 for 7.22. How much money does he save by buying 30 T-shirts at th
Helen [10]

Toby saves 30.30 money by buying 30 T-shirts at better price.

Step-by-step explanation:

Cost of pack of 5 T-shirts = 13.00 money.

Cost of pack of 2 T-shirts = 7.22 money.

Toby wants to buy total T-shirts = 30 T-shirts.

<u>Case 1 </u>:

For 30 T-shirts, If Toby buys in packs of 5 T-shirts then the number of packs he should buy = 30/5 = 6 packs.

The cost for six packs of 5 T-shirts =  6*13.00 = 78.00 money.

<u>Case 2 </u>:

For 30 T-shirts, If Toby buys in packs of 2 T-shirts then the number of packs he should buy = 30/2 = 15 packs.

The cost for 15 packs of 2 T-shirts =  15*7.22 = 108.30 money.

The money saved = 108.30 -78.00 = 30.30 money.

Therefore, The better price to buy 30 T-shirts is 78.00 money.

3 0
3 years ago
Sinxcosxtanx=1-cos^2x
ycow [4]

Step-by-step explanation:

sin  x \: cos  x \: tanx = 1 -  {cos}^{2} x \\ LHS \\= sin  x \: cos  x \: tanx \\  =sin  x \: cos  x \: \times  \frac{sin  x}{cos  x}  \\  = sin  x \: \times  \frac{sin  x}{1} \\  ={sin}^{2}  x \\  = 1 -  {cos}^{2} x \\  = RHS \\  \therefore \: sin  x \: cos  x \: tanx = 1 -  {cos}^{2} x \\ Hence \: Proved.

7 0
3 years ago
What is the value of a? A) 28 B) 45 C) 62 D) 73
Veronika [31]

The value of a is D)73 I think because 180-107 since a straight line is 180 u just subtract the angle from it. hope this helps.

6 0
3 years ago
Read 2 more answers
Help find the value of x pls. No links! Y
Citrus2011 [14]

=>7x+9=9x+5

=>7x+9-9=9x+5-9

=>7x=9x-4

=>7x-9x=9x-4-9x

=>-2x=-4

=>x=2

=>7x+9=7×2+9=23

=>9x+5=9×2+5=23

4 0
3 years ago
How many planes appear in this figure? Name three points that are collinear. Are points a, b, c, and d coplanar? Explain. At wha
xxTIMURxx [149]
D, B, and A are collinear. Yes they are coplanar because they all lay on the same plane. And I don’t understand the last question
3 0
3 years ago
Other questions:
  • Calculating dosages ch 4 if a satellite can travel 200 feet per second, how many hours will it take the satellite to travel 10,0
    7·1 answer
  • Part A: Factor 3x2y2 − xy2 − 2y2. Show your work. (4 points) Part B: Factor x2 + 6x + 9. Show your work. (3 points) Part C: Fact
    10·1 answer
  • Triangle abc is such that ab=4 and ac=8 if m is the midpoint of bc and am=3, what is the length of bc?
    11·1 answer
  • a golf ball can travel 170mph. This is 10/7 times the fastest speed recored for a hockey puck. What is the recored speed for a h
    8·1 answer
  • Why is the mechanical advantage of using a single pulley always 1? Assume there’s no friction. A. The input force is in a differ
    12·1 answer
  • PLZ HELP QUICK I NEED HELP 3 ^x−1 = 9 ^x+2
    6·1 answer
  • How many 5/8 foot pieces of wood can you cut from a board that is 4 5/8 feet long?
    13·1 answer
  • What is the first step in solving quadratic equations by finding square roots? a. give the positive and negative answer c. squar
    9·1 answer
  • A bowl contained 49.7 grams of salt. Then, Charlie poured in another 41.14 grams. How much salt does the bowl contain now?
    15·1 answer
  • A cone is 10 inches tall and has a radius of 3 inches. What is the cone's volume?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!