If the sum of the square of the number and 4 time the number is 21,
what is the number?
Answer:
I think there is a missing “and” there: “If the sum of the square of the number and 4 times the number is 21, what is the number?”
If so, then we have: x² + 4x = 21, or x² + 4x - 21 = 0.
This factors as (x+7)(x-3) = 0, so x = -7 or x = 3.
Scientific understandings can change as new information is discovered. Which is an example of how scientific understandings have changed? A.People once thought Earth was round. Now they understand that it is flat. B. The Law of Universal Gravitation has not been tested many times and is no longer taught in science. C.The understanding of mountain building and earthquakes changed once people accepted the theory of plate tectonics. D.The inclined plane, which is a simple tool that may have been used by the Egyptians to build the pyramids, now has other applications.
Answer:
E. People once thought animals were individually create by some superior.
But the solid creation of theory of origin of species by the naturalist Charles Darwin demonstrated a different theory.
Step-by-step explanation:
Before Charles Darwin several scientists were discussing the hypothesis of a theory of evolution. But it was Darwin whom put together all the information with reliable explanation and correlation between animal specialization and environment accordyinly with time.
He spent almost five years on board the ship HMS Beagle, crossing several continents, starting with South America. From there, he returned with dozens of specimens of living species, illustrations and fossils. Those specimens helped Darwin in his discoveries which originated the book On the Origin of Species published in 1859.
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Answer:
I believe thats 8 to the power of 7
Step-by-step explanation:
Answer:
i clicked your link adn it looks like 8^7 or 8 to the 7th power which would be 2,097,152
Step-by-step explanation:
What does PIN stand for?
a. Principal Investment Number
b. Permission Initiating Number
c. Percent Increase Number
d. Personal Identification Number
Answer:
D
Step-by-step explanation:
PIN stands for Personal Identification Number. Option d is correct.
What is a Personal Identification Number.?An alphanumeric or numeric string called a personal identification number (PIN) is used to verify a person's identity in a system.
Automated Teller Machines (ATM) for a bank, are the primary use cases for PINs (ATM). PINs are frequently used in place of more complex passwords to unlock mobile devices and authenticate users to applications.
Along with the development of the ATM, PINs were invented in the UK. In 1967, Barclays debuted ATMs as a convenient way for consumers to obtain cash. They also introduced ATM check deposits, which made use of codes printed on checks to help correctly account for such transactions.
Learn more about Personal Identification Numbers here,
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Peyton go shopping she finds T-shirts one +24.97 and the other cost 13.75 she needs to know if she has enough money to buy both shirts using mental math she round $24.97-$25 and exit 213.75 to get 38.75 how does Peyton need to compensate find the exact all of the Two shirts
Answer: Subtract 0.03.
Step-by-step explanation:
given data:
Cost of T-shirt one = $24.97.
cost of T-shirt two = $13.75.
peyton rounded the cost of the first T-shirt up to $25 ( by adding $0.03 ). The addeded the cost of the second shift to arrive at a total cost of $38.75 for both.
to find the exact amount of the two shirts, peyton needs to subtract 0.03 from the total amount.
= $38.75 – 0.03
= $38.72
The original amount of both T-shirt is $38.72.
Using the table created in part a determine how long it will take to complete the calls of Emma and Jackson work together
Answer: look at the image. hope this helps
Step-by-step explanation:
given m ll n find the value of x
Answer:
63°
Step-by-step explanation:
opposite angle
63°
What is the value of x?
(5x)
(3x + 18)º
A. x = -2.25
B. x = 2.25
Cx = 9
D. x = -9
Does anyone know how the repeating decimal symbol (line above a decimal) looks on a calculator? I can’t find it
Answer: I don't think there is a repeating sign, at least on the calculator I use, you may just have to write the number out.
Step-by-step explanation:
on a scale drawing, 3 inches represents 50 miles. if a line segment between two point measured 7 inches, how many miles would it represents
Answer:
It would represent 116.66666667
Step-by-step explanation:
3 inches= 50 miles
1 inch = 50/3 miles
7 inches = 50/3 × 7 miles
= 116.66666667 miles
Angels family is visiting the city they are looking for a place to spend the night and discovered that the plaza hotel charges 110 per night.Write an equation
Answer:
$110 x 7 =$770. A weeks stay at the Plaza Hotel will cost $ 770.00. 7 days multiplied by $110 will cosr $770
how do you do 32x−4=14x+12
Answer:
8/9
Step-by-step explanation:
you will add 4 to both sides and minus 14x from both sides making it 18x= 16 divided 18 from both sides with will be 16/18 but simplify it and it will be 8/9
Answer:
8
9
Step-by-step explanation:
What is the LCM (12, 15)?
Answer:
60
Step-by-step explanation:
12x5=60 and 15x4=60 so 60 is the LCM
Ali bought 8 apples for a total of $14.32. How much
did each apple cost?
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Caroline's Coffee Shop sells a refill mug for $8.95. Each refill costs $1.50. Last month Sean spent $26.95 on a mug and refills. How many refills did he buy?
Answer:
The answer is 12
Step-by-step explanation:
All you had to do is subtract 26.95 by 8.95 which is 18, and then you would divide 18 by 1.50 and your answer is 12!
I hope this helped you! Make sure to mark me as a Brainliest!
What is the slope of the line y=3?
Answer:
The slope of the line is zero.
Step-by-step explanation:
The slope is zero. This is a perfectly horizontal line passing through y=−3 .
Which value of x makes the equation
0.25(x + 20) = 0.1(x + 70) + 0.05x true?
A.0.2
B.25
C.20
D.2
Answer:
C. 20
Step-by-step explanation:
20 is the only value that makes x true. Basically x = 20.
We find this by doing the "good ol' Isolate the variable by dividing each side by factors that don't contain the variable."
Hope this helps and have a nice day!
What is 5+5 and how do i use my fingers to get it?
Answer:
5+5=10
Step-by-step explanation:
If you have 5 fingers on 2 hands, you put them together and count 1 by 1. if not then since there are 2 5s, multiply 5 and 2, hten tell you're teavher you dont got no fingers
the next model of the car will cost 14.4% more than the current model. the current model costs 39,000 how much will the price increase in dollars? what will be the price of the next model
$ 44616
Step-by-step explanation:Hi there !
What will be the price of the next model ?
$39000 + $39000×14.4% =
= $39000 + $39000×0.144
= $39000(1 + 0.144)
= $39000×1.144
= $ 44616
Good luck !
if Sam drove 5 miles per hour 3 minutes how many miles will it take Sam to get to another 17 miles
Answer:
It will take Sam another 10 minutes and 20 seconds to go another 17 miles.
Does anyone know if this is a function ?
Answer:
Yes, it is a function
Step-by-step explanation:
This is a function since each x value, the number on the left in the paretheses only has one y value.
If any x had more than one y value, it wouldn't be a function.
Hope this helps:)
Find the midpoint of the segment with the following endpoints.
(4, -10) and (10,0)
literally anyone know this ?
Ok the answer is (7,-5)
Please help me with this problem thank you
LP is 12 units, MN is 3, so MN is 1/4 of LP, meaning there is a 25% chance that any point on LP is MN
help pleaseeeeee and quick too lol!
Step-by-step explanation:
2/root 9=2/3 = 0.6666666667
Answer:
0.66666
Step-by-step explanation:
What two numbers multiply get 45 and added get -18?
Answer:
-3 and -15
Step-by-step explanation:
-3*-15=45
Answer: When 45 is added to -18 it’s written as 45-18=27.
what is 1000x57 to the second power?
Answer:
57*57*1000= 3249000
(>'-'<)
Name the plane in 2 ways please! simple and quick :)
Answer:
Plane A or Plane MVN
Step-by-step explanation:
Use the rule y = -x + 7 to fill in the blank.
If (-1, y) is on the graph, then y = ___
Answer:
8
Step-by-step explanation:
x=-1 so -(-1)+7=y
1+7=y
8=y
Answer:8
Step-by-step explanation:
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A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. Using this equation, find the time that the rocket will hit the ground, to the nearest 100th of second. y=-16x^2+157x+124 y=−16x 2 +157x+124
Answer:
Rocket will hit the ground in 10.55 seconds.
Step-by-step explanation:
Let be [tex]y = -16\cdot x^{2}+157\cdot x +124[/tex], where [tex]x[/tex] and [tex]y[/tex] are time after launch and the height of the rocket, measured in seconds and meters, respectively. To find the time that the rocket will hit the ground, we need to equalize height to zero and solve the resulting expression:
[tex]-16\cdot x^{2}+157\cdot x + 124 = 0[/tex]
The quadratic function can be solved analitically by Quadratic Formula, that is to say:
[tex]x = \frac{-157\pm \sqrt{157^{2}-4\cdot (-16)\cdot (124)}}{2\cdot (-16)}[/tex]
Roots of the polynomial are, respectively:
[tex]x_{1} \approx 10.55\,s[/tex], [tex]x_{2}\approx -0.74\,s[/tex]
Only first root offers to us a reasonable solution. Hence, we conclude that rocket will hit the ground in 10.55 seconds.
does anyone know the answer to this?
Answer:
it might be 48 seeing that 1/4 of df is dz so add zf to it and df should equal 48
Step-by-step explanation: