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
Tresset [83]
3 years ago
12

The product of two consecutive integers is 420 An equation is written in standard form to solve for the smaller integer by

Social Studies
2 answers:
ivann1987 [24]3 years ago
5 0

The constant is zero. Hope I helped.

statuscvo [17]3 years ago
3 0

Answer:

-420

Explanation:

if we call the fist of the numbers x, then the following number is x+1.

the product of this two numbers according to the problem is:

(x)(x+1)=420

which results in:

x^2+x=420

The standar form of a quadratic equation is

Ax^2+Bx+C=0

so we must make the equation equal to zero: x^2+x-420=0

and this way we can see that the constant C in the quadratic expression is -420.

if you want the values of the consecutive numbers, they are 20 and 21.

You might be interested in
How did many people in Lufkin, in East Texas, make a living in the early 1900s?
Angelina_Jolie [31]

Answer:

c. The lumber industry building a railroad.

4 0
2 years ago
Who introduce democaracy
gregori [183]
Marble, Roman copy after a Greek original from ca. 430 BCE. The Athenian democracy of Cleisthenes<span>and </span>Pericles<span> was based on freedom, through the reforms of Solon, and equality (isonomia), introduced by </span>Cleisthenes<span> and later expanded by Ephialtes and</span>Pericles<span>.</span>
8 0
3 years ago
Is this true or false?
Dovator [93]

I believe the answer is true.

4 0
3 years ago
Read 2 more answers
describe an item that would help this geologist make better observations about the rocks while in the field?​
faltersainse [42]

Answer:

"They use several different methods.  

1. Dating the things found with the fossil.  

2. Checking what kind of fossils are in the same layer of sediment. (index fossils)  

3. Checking changes to the atoms in the rock.  

Here is some information from a good web site:  

Paleontologists use many ways of dating individual fossils in geologic time.  

* The oldest method is stratigraphy, studying how deeply a fossil is buried. Dinosaur fossils are usually found in sedimentary rock. Sedimentary rock layers or strata are formed episodically as earth is deposited horizontally over time. Newer layers are formed on top of older layers, pressurizing them into rocks. Paleontologists can estimate the amount of time that has passed since the stratum containing the fossil was formed. Generally, deeper rocks and fossils are older than those found above them.  

* Observations of the fluctuations of the Earth's magnetic field, which leaves different magnetic fields in rocks from different geological eras.  

* Dating a fossil in terms of approximately how many years old it is can be possible using radioisotope- dating of igneous rocks found near the fossil. Unstable radioactive isotopes of elements, such as Uranium-235, decay at constant, known rates over time (its half-life,which is over 700 million years). An accurate estimate of the rock's age can be determined by examining the ratios of the remaining radioactive element and its daughters. For example, when lava cools, it has no lead content but it does contain some radioactive Uranium (U-235).  

Over time, the unstable radioactive Uranium decays into its daughter, Lead-207, at a constant, known rate (its half-life). By comparing the relative proportion of Uranium-235 and Lead-207, the age of the igneous rock can be determined. Potassium-40 (which decays to argon-40) is also used to date fossils.  

The half-life of carbon-14 is 5,568 years. That means that half of the C-14 decays (into nitrogen-14) in 5,568 years. Half of the remaining C-14 decays in the next 5,568 years, etc. This is too short a half-life to date dinosaurs; C-14 dating is useful for dating items up to about 50,000 - 60,000 years ago (useful for dating organisms like Neanderthal man and ice age animals).  

Radioisotope dating cannot be used directly on fossils since they don't contain the unstable radioactive isotopes used in the dating process. To determine a fossil's age, igneous layers (volcanic rock) beneath the fossil (predating the fossil) and above it (representing a time after the dinosaur's existence) are dated, resulting in a time-range for the dinosaur's life. Thus, dinosaurs are dated with respect to volcanic eruptions.  

* Looking for index fossils - Certain common fossils are important in determining ancient biological history. These fossil are widely distributed around the Earth but limited in time span. Examples of index fossils include brachiopods (which appeared in the Cambrian period), trilobites (which probably originated in the pre-Cambrian or early Paleozoic and are common throughout the Paleozoic layer - about half of Paleozoic fossils are trilobites), ammonites (from the Triassic and Jurassic periods, and went extinct during the K-T extinction), many nanofossils (microscopic fossils from various eras which are widely distributed, abundant, and time- specific), etc. "

The Information came from a deleted account one Brainly.

6 0
3 years ago
Mendoza et al. (2009) introduced a coin-rotation task as a convenient test of motor dexterity. It involves timed completion of t
larisa [96]

Answer

conceptual

Explanation

Manual dexterity is the ability of using your hands in a skillful way  thus manipulating objects and demonstrating small precise movements so as to come up with specific results or certain results. Manual dexterity is the abstract concept that the researcher wants to study so it is a conceptual variable. This is because the conceptual tells you the meaning of the concept . This tells you what your constructs are , and this is normally done by explaining how they are related to other constructs. Conceptual validity is a test measure that claims  to be measuring. Thus in measurement validity will measure what is supposed to measure .

8 0
3 years ago
Read 2 more answers
Other questions:
  • Sociologically, what is a family? A man and a woman and their children engaged in a supportive relationship. A household compose
    8·1 answer
  • Excessive air traffic noise in the neighborhoods surrounding an airport's flight path is an example of
    14·1 answer
  • True or false the south possessed a strong military tradition and many gifted military commanders
    5·1 answer
  • When did activities occur that demonstrate Americans belief in manifest destiny
    14·2 answers
  • A study of communication patterns in dolphins yields results that probably did not occur by chance. the researchers are likely t
    8·1 answer
  • How did prejudice and discrimination affect the development of sociology in America in the late
    12·1 answer
  • Which of the following statements best describes part of Adam Smith philosophy about economics? Please help me with world histor
    8·1 answer
  • What was the most important change that Taizong made to build the Tang dynasty? Answers in the picture ​
    6·1 answer
  • Ways to maintain national integrity ?any six point​
    11·1 answer
  • The table below represents which kind of sentence of SL:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!