Answers
Answer:
b
Step-by-step explanation:
Related Questions
Two chemicals are mixed in a test tube and a chemical reaction takes place. If this reaction is endothermic and the test tube is touched, which of the following best describes what is felt?
The test tube is cold.
The test tube is warm.
The test tube is very hot.
The test tube is the same temperature as the air.
Answers
The test tube is cold best describes what is felt.
Option A is the correct answer.
What is a chemical reaction?A chemical reaction is a process that leads to the transformation of one set of chemical substances into another.
In other words, it is the process of breaking and forming chemical bonds between atoms to create new compounds with different properties than the original substances.
We have,
An endothermic reaction is a type of chemical reaction that absorbs heat from the surrounding environment, resulting in a decrease in temperature.
In this case,
The chemical reaction that occurred in the test tube absorbed heat from the surroundings, including the air and the test tube itself.
As a result, the temperature of the test tube decreased, making it feel cold to the touch.
Thus,
The test tube is cold best describes what is felt.
Learn more about the chemical reaction here:
https://brainly.com/question/29039149
#SPJ3
Please help me!!! Whoever best explains their answer will get brainliest!!!
Answers
Answer:
yellow I believe is the answer
Answer:
It is the yellow one.
Step-by-step explanation:
When you have 4x+2y=1 and -4x+4y=5 you subtract.
Find the equation of the line that passes through the given points on the graph below.
Answers
because rise over run is slope or you can do (y2-y1)/(x2-x1) and the y intercept is -1
Answer:
y = -4/3x - 1
Step-by-step explanation:
Wendy needs to purchase 34 vases, which cost $3 each, and flowers for the vases, which cost $2 each. She has $442 to spend on her vases and flowers.
Which of the following inequalities would show the maximum number of flowers, x, Wendy can buy without spending more than $442?
Answer choices:
A. x + $34 $442
D. $2x + $102 > $442
Answers
Brainliest to the first right, :))))
Answers
Answer:
y=8
Step-by-step explanation:
Consider z = 3StartRoot 3 EndRoot + 3i. What happens to the modulus and argument when z is raised to the 4th power?
Answers
Answer:
It's A
Step-by-step explanation:
Just took it and it matches
The modulus increased by 216 and the argument increased by π/2. Option A is correct
The number that constitutes of real and imaginary numbers are called complex numbers.
[tex]z = 3\sqrt{3} + 3i\\z^4 = (3\sqrt{3} + 3i)^4\\z^4 = 648(-1+\sqrt{3}i )[/tex]
Modulus and argument of [tex]z^4[/tex] is given by.
[tex]|z^4| = 648\sqrt{1+3} \\|z^4| = 648\sqrt{4} \\|z^4| = 648*2\\|z^4| = 1296[/tex]
argument
[tex]\theta=tan^{-1}(\sqrt{3} /-1)\\\theta=tan^{-1}(-\sqrt{3} )\\\theta= -\pi /3[/tex]
similarly, the Modulus and argument of z is given by.
Modulus
|z| = 6
argument
[tex]\theta=\pi /6[/tex]
Now comparing Modulos and argument of [tex]z^4[/tex] and z
[tex]z^4[/tex]/z = 1296/6 = 216
[tex]\theta=\pi /6+\pi /3\\\theta=\pi /2[/tex]
Thus, The modulus increased by 216 and the argument increased by π/2. Option A is correct.
Learn more about complex number here: https://brainly.com/question/28007020
#SPJ5
Please help this is due in 2 periods.
Answers
Answer:
21
Step-by-step explanation:
Use Pemdas.
Parentesis first so 5+4 = 9 and 8-6=2 so, 9X2=18+3=21
Find the sale price of each item. Round to two decimal places when necessary.
Original Price: $22.50
Markup: 42%
Answers
Answer:
31.95
Step-by-step explanation:
So first you have to identify what the mark up is which would be $9.45
Then you add that to 22.50... And idk what you mean by Round up to two decimal places when necessary.
Answer:
$31.95
Step-by-step explanation:
22.50*1.42=31.95
11 more than a number q is negative 15 ; Solve for the variable.
Answers
Answer:
q = -26
Step-by-step explanation:
Set up an equation where q is the unknown number:
q + 11 = -15
Solve for q by subtracting 11 from both sides:
q + 11 = -15
q = -26
What is the surface area of the solid
Answers
use the absolute value formula to express the distance between 9 and -8
Answers
Answer:
I think it's 17 I hope I'm right
The square below represents one whole. Express the shaded area as a fraction, a decimal, and a percent of the whole.
Answers
Answer as a fraction = 1/2
Answer as a decimal = 0.5
Answer as a percent = 50%
========================================
Explanation:
There are 5 blue rectangles out of 10 total. This forms the fraction 5/10 and that reduces to 1/2 after dividing both parts by 5. Therefore, the fractions 5/10 and 1/2 are the same. Notice that exactly half of the entire figure is shaded blue.
Use long division or your calculator to find that 1/2 = 0.5 which converts to 50% when you move the decimal point 2 spots to the right.
Answer:
5/10 , 0.5 , 50%
Step-by-step explanation:
A construction crew is extending a highway sound barrier that is 13 miles long. the crew builds 1/2 of a mile per week. Write an equation the represents the length Y (in miles) of the barrier after X weeks.
Answers
Answer:
y= 1/2x + 13
because the barrier is already 13 miles long, and they're adding 1/2 miles every week
The equation the represents the length Y (in miles) of the barrier after X weeks is y = (1/2)x + 13
A linear equation is in the form:
y = mx + b;
where m is the slope, b is the y intercept and y, x are variables.
Let y represent the length of the barrier after x weeks.
Since the crew builds 1/2 of a mile per week hence m = 1/2, Also the barrier is 13 miles long, hence b = 13, hence:
y = (1/2)x + 13
The equation the represents the length Y (in miles) of the barrier after X weeks is y = (1/2)x + 13
Find out more at: https://brainly.com/question/18645580
i need help please fast
Answers
i hope this helped !!
A recipe requires one quarter cup of milk as a base and then, in addition, 1 cup of milk for every 4 cups of flour. Choose a linear equation that describes the relationship.
A.y=4x + 4
B.y=4x+14
C.y=14x+4
D.y=14x + 14
Answers
A recipe requires 1 cup of milk for every 4 cups of flour.
Let y denotes the number of cups of milk and x denotes the number of cups of flour.
Hey guys quick question will crown
∆FUN is dilated using the origin as the center of dilation and a scale factor of 12 to form ∆F'U'N'. What is the relationship between ∆FUN and ∆F'U'N'?
A . They are similar
B. They are not not similar
C. They are similar and congruent
D. They are congruent
Answers
Answer:
D. They are congruent.
Step-by-step explanation:
Since the two are made up of congruent and unique chemicals.
I hope I have helped, can you say that this is the smartest answer please.
Answer:
A. They are similar
Step-by-step explanation:
Similar mean they have the same angle measures and proportions but they do not have to have the same side lengths. Congruent is when they have the same side lengths and angle meausres. Since one is larger than the other they are similar.
Nick leaves his apartment and travels down two flights of stairs to get to the parking lot below ground level. Nick’s elevation, in feet, as it relates to time is represented by the sketch shown below.
Which statement best represents the three horizontal portions of the graph?
Nick's speed decreases.
Nick is moving but the elevation is constant.
Nick stopped but the elevation is decreasing.
Nick is moving at a constant rate as the elevation is decreasing.
Answers
Answer:
Nick’s speed decreases
Step-by-step explanation:
He’s not going at a steady speed, and his speed only decreases
help please
Dan works a paper route. He started out with 180 papers. He has 65 left to deliver. Write
and solve an equation to find the number of papers Dan has delivered.
Answers
Answer:
so if he has 180 papers now he has 65 the answer should be 115
Step-by-step explanation:
180-65=115
Answer: The Answer is 115. I belive this is correct, please comment if not.
Step-by-step explanation: Ok, so to find this answer all you have to do is subtract 180-65=115
A small number of cards has been lost from a complete pack. If I deal among four people, three cards remain. If I deal among three people, two remain and if I deal among five people, two cards remain. How many cards are there?
Good Luck!! First correct answer gets brainliest!!!
Answers
Answer:
There are 47 cards
Step-by-step explanation:
Trial and error
Convert phrases to numerical expressions and solve
Ten to the power of four minus one thousand plus one thousand
Answers
Answer:
10000 - 1000 + 1000 = 10000
Step-by-step explanation:
10 to the forth power = 10000 - 1000 = 9000 + 1000 = 10000
Solve the inequality for x
-3x + 6 < 15
A) x < -3
B) x < -7
C) x > -3
D) x > -7
Answers
Answer: The answer is maybe a but b is close to a answer also so maybe a or b but c and d is no were close
Step-by-step explanation:
Answer:
the answer is A
Step-by-step explanation:
Help and you get BRANILEST I ALSO PUT 46 points
Answers
Answer:
C
Step-by-step explanation:
my teacher told me
Please help get value of x. I believe it is 7 but idk.
Answers
Answer:
It's 8
Step-by-step explanation:
-8x+2y>-6
y>-3+4x
Solve the system if equations pls help me
Ignore my username
Answers
1. You have two playing cards with a sum of (−12) in your hand.
a. What two cards could you have?
b. You add two more cards to your hand, but the total sum of the cards remains the same, (−12). Give two different examples of two cards you could choose.
Answers
THIS IS DO TODAY I NEED HELP PLS
Answers
Answer: $9.99
Step-by-step explanation:
2=$4
2/2=1
4/2=2
$2+$8 =10$
Answer:
D.$9.95
Step-by-step explanation:
If you divide the cost of 2 pairs of socks in half which is $3.98 you would get $1.99 which is the cost of 1 pair of socks and then you would multiply $1.99 by 5 to get $9.95 which would be the cost of 5 pairs of socks.
can u help me please
Answers
Answer: There is no solution
Step-by-step explanation:
First, move the 7 to the other side
y=3x-7
Then plug that into the second equation
6x-2(3x-7)=12
6x-6x+14=12
0x=-2
There is no solution
The distance on the number line, is its _______________ _______________. It is always _________________________.
Answers
Answer:
answer
Step-by-step explanation:
Can someone plz help
Answers
Answer:
it is either 300 or 10 hope this helps please mark brainliest
Step-by-step explanation:
Coach Carter buys 4 boxes of crackers from a store to sell at the concession stand. Each box contains 24 packs of crackers. When he opens the boxes, he finds that 16 packs of crackers are broken up and cannot be sold. Based on these results, what can the coach predict about buying more crackers from the same store?
8 boxes will contain 32 packs of broken crackers
5 boxes will contain 10 packs of broken crackers
1 box will contain 3 broken packs of crackers
3 boxes will contain 9 broken packs of crackers
Answers
Answer:
I believe that A would be the correct answer im not sure but ill explain from the best of my ability
Step-by-step explanation:
OK SO FOR THE EXPLANATION I BELIEVE THAT IT IS A BECAUSE USUALLY ON THE OTHER QUESTIONS I HAVE HAD IT WOULD USUALLY SPLIT THE FIRST AMOUNT IN HALF AND THAT IS MY EXPLANATION GOOD LUCK