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
iris [78.8K]
3 years ago
8

How to do operations with scientific notation

Mathematics
1 answer:
Shtirlitz [24]3 years ago
7 0
1. Rewrite the number with the smaller exponent so that it has the same exponent as the number with the larger exponent by moving the decimal point of its decimal number.
2.Add/subtract the decimal numbers. The power of 10 will not change.
3. Convert your result to scientific notation if necessary.
You might be interested in
Convert 7.23 (3 reapting) to a fraction
Svetllana [295]

x=7.2\overline{3}\\\\10x=72.\overline{3}\\\\100x=723.\overline{3}\\\\100x-10x=723.\overline{3}-72.\overline{3}\\\\90x=651\\\\x=\dfrac{651}{90}=\dfrac{217}{30}

8 0
3 years ago
What is one of the solutions to the following equations? y2+x2=53<br> Y-x=5
Olenka [21]
(1)  y² + x² = 53
(2)  y - x = 5 ⇒ y = x + 5

subtitute (2) to (1)

(x + 5)² + x² = 53      |use (a + b)² = a² + 2ab + b²

x² + 2x·5 + 5² + x² = 53

2x² + 10x + 25 = 53     |subtract 53 from both sides

2x² + 10x - 28 =0     |divide both sides by 2

x² + 5x - 14 = 0

x² - 2x+ 7x - 14 = 0

x(x - 2) + 7(x - 2) = 0

(x - 2)(x + 7) = 0 ⇔ x - 2 = 0 or x + 7 = 0 ⇔ x = 2 or x = -7

subtitute the values of y to (2)

for x = 2, y = 5 + 2 = 7
for x = -7, y = 5 + (-7) = 5 - 2 = 3

Answer: x = 2 and y = 7 or x = -7 and y = 3
4 0
3 years ago
What is m∠PTR? a. 12 b. 40 c. 50 d. 140 HELP!!!
kramer

Answer:

m<PTR = 140°

Step-by-step explanation:

First, find the value of x. To find the value of x, derive an equation which you'd use in solving for x.

m<PTQ = (x + 28)°

m<RTS = (2x + 16)°

m<PTQ = m<RTS (vertical opposite angles are congruent)

Therefore:

x + 28 = 2x + 16

Solve for x. Combine like terms

28 - 16 = 2x - x

12 = x

x = 12

Find m<PTQ

m<PTQ = (x + 28)

plug in the value of x

m<PTQ = 12 + 28 = 40°

m<PTR + m<PTQ = 180° (supplementary angles)

m<PTR + 40° = 180° (substitution)

m<PTR = 180 - 40 (subtracting 40 from each side)

m<PTR = 140°

3 0
3 years ago
Why are the orbitals represented in those<br> shapes?
Marat540 [252]

Answer:

An orbital is a wave function for an electron defined by the three quantum numbers, n, ℓ and ml. Orbitals define regions in space where you are likely to find electrons. s orbitals (ℓ = 0) are spherical shaped. p orbitals (ℓ = 1) are dumb-bell shaped.

Step-by-step explanation:

not sure

3 0
2 years ago
Explain how you know whether to add or subtract when you use the distributive property to multiply?
Anettt [7]

Answer: You must see if it is a distributive property of multiplication over addition or a distributive property of multiplication over subtration.

Step-by-step explanation:

You can find two kind of expressions in this property:

- Distributive property of multiplication over addition: When you mulitply a sum by a number. For example:

a(b+c)=ab+ac

-  Distributive property of multiplication over subtration: When you mulitply a subtration expression by a number. For example:

a(b-c)=ab-ac

6 0
3 years ago
Read 2 more answers
Other questions:
  • A car dealer organizes the inventory of a specific model of car into a frequency table comparing the type of car and the model y
    15·2 answers
  • 11 times a number increased by 2 is the same as 6 more than 9 times the number. Find the number.
    6·1 answer
  • How do you write the indicated form of a function for an absolute value equation?
    5·1 answer
  • Your friend uses the equation c=50p to find the total cost c for the number of people p internal local amusement park create a t
    15·1 answer
  • Find the height of the cylinder.
    8·2 answers
  • I<br><br> Is x= -2 a solution to:<br> a.<br> 7X = -1<br> b. X* 14 = -28
    14·1 answer
  • What is the result of 5 divided by 1/5?
    15·2 answers
  • Zack bought a coat for $69.78. He paid with $100 bill and received $26.73 in change. How much was the sales tax?
    13·2 answers
  • What is the slope of the line described by the equation below?
    11·1 answer
  • Only answer bottom one!! brainliest + 5 stars &amp; a heart &lt;3
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!