Answer:
True
In a chemical change, the molecules in the reactants interact to form new substances. In a physical change, like a state change or dissolving, no new substance is formed. Explain that another way to say that no atoms are created or destroyed in a chemical reaction is to say, “Mass is conserved.”
Step-by-step explanation:
Hope it helps :)
Have a good day/night
Brainliest pls?
PLEASE HELP MEEEE!!!
What strategies can you use to solve a linear equation such as 136x+6) = X+8? Your answer:
Answer:
Simplify each side of the equation as much as possible. ...
Collect all the variable terms on one side of the equation. ...
Collect all the constant terms on the other side of the equation. ...
Make the coefficient of the variable term to equal to 1. ...
Check the solution.
Step-by-step explanation:
Expand.
Your answer must be a polynomial in standard form.
m(-m^3 + m^2 + 3m)
Answer:
-m^4+m^3+3m^2
Step-by-step explanation:
An elevator started on the first floor, went up 18 floors, then came down 11 floors and went back up 16.
1 + 18 - 11 + 16
1 - 18 - 11 + 16
1 + 18 + 11 - 16
1 - 18 + 11 - 16
Answer:
1+18-11+16
Step-by-step explanation:
if the elevator went up it will be plus but if the elevator came down it will be minus and then you will get 1+18 because it went up and then it go down 11 floor and it will be 1+18-11 and then it went up again 16 floor so the last answer will be 1+18-11+16
what is the domain and range of this function
Answer:
what function
we cant see a problem
Step-by-step explanation:
Help! Pls! I'm lost. I would really appreciate it if anyone knows all the answers.
(Math; Scientific Notations)
Answer:
1) b. 1.562x10⁸
2) a. 4.8x10⁶
4) d. 2.3x10³
5) a. 4.21x10 -⁶
6) 6.6835x10⁵
Step-by-step explanation:
1) (2.2x10⁴)•(7.1x10³)= 156200000
2) 9.6x10⁹÷2x10³= 4800000
4) 6.9x10⁸= 2300
5) 5.6x10 -⁷ + 3.65x10 -⁶= 4.21x10 -⁶
6) 6.72x10⁵ - 3.65x10³= 668350
56 = 7.42-1 Type your answer into the box
i dont understand the question
i need help please. i will give you a brainly
Answer:
2 for the second box and 162for the third box
Step-by-step explanation:
can i get brainliest
Last week, Shiloh owed her brother $25.50. This week, she owes him another $6.30, for a total of $31.80.
The story above can be modeled by the addition problem -25.50 + (-6.30) = -31.80. Write a related story that is modeled by the division problem -31.80 ÷ 6 = -5.30.
Answer:
Sarah had $31.80 and she owed 6 friends money.So she owes each friend $5.30.
Hope i helped please mark brainliest
Which of these situations can be represented by the opposite of -25?
A scuba diver is 25 feet below sea level.
Leon gets paid $25
An airplane descends 25 feet.
Sala has a $25 debt
Answer:
the following 3 are correct statements
A scuba diver is 25 feet below sea level.
An airplane descends 25 feet.
Sala has a $25 debt
simplify
7 + 2 (4x - 3) = ?
Someone tell me this i'm not smart
HELP PLEASE THIS IS DUE
Graph each equation.
6x + 3y = 6
Answer:
A
Step-by-step explanation:
y=−2x+2
843 ÷ 10 To solve 843 ÷ 10, start by showing 843 on the place value chart. thousands hundreds tens ones tenths hundredths thousandths 1 2 3 4 5 6 7 8 9 0
Answer:
84.3
Step-by-step explanation:
843 ÷ 10
The place value of 843 is
8 = Hundreds
4 = Tens
3 = Units or ones
Hence,
843 ÷ 10
= 843/10
= 84.3
A jar of pinto beans and black beans has a ratio of 1:1. There are 300 pinot beans. How many beans in total are in the jar?
300
1:1
1*300:1*300
300:300
Whenever the two numbers in a ratio are the same it means that they're equal. Hope this helps :)
Which expression is equivalent to StartFraction 1 Over 1 minus 2 sine squared (x) EndFraction?
StartFraction 1 Over cosine (2 x) EndFraction
StartFraction 1 Over sine (2 x) EndFraction
Cosine (2 x)
Sine (2 x)
Answer:
A. 1/cos(2x)
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
on edge
Triangle ABC is dilated by a scale factor of 4 to from triangle A’B’C.
The coordinate of vertex A’ are (8,4) ( -4,2) (4,-8) (-8,4
The coordinate of vertex B are (6,6) (12-12) (-12,12)
The coordinate of vertex C are (2,6) (-4,12) (12,-4)
Answer Triangle ABC is dilated by a scale factor of 4 to from triangle A’B’C. The coordinate of vertex A’ are
Step-by-step explanation:
just answer number 2
Answer:
C
Step-by-step explanation:
just is lol please make me brainliest
Solve the system by substitution. Check your solution.
y = 0.8 x + 7.2.
20 x + 32 y = 48.
a. (8, -6)
b. (5, 11)
c. (-4, 4)
d. (-10, 2)
Answer:
c. (-4, 4)
Step-by-step explanation:
y = 0.8x + 7.2
20x + 32y = 48
20x + 32y = 48
20x + 32(0.8x + 7.2) = 48
20x + 25.6x + 230.4 = 48
45.6x + 230.4 = 48
45.6x = -182.4
x = -4
y = 0.8x + 7.2
y = 0.8(-4) + 7.2
y = -3.2 + 7.2
y = 4
Answer:
C. (-4,4)
Step-by-step explanation:
Because i did it and got it right on (Edge)
A kayak is originally priced at $160. The online retailer gives a discount and the kayak is now priced at $88. Enter the percentage discount for the cost of the kayak.
Answer:An important category of percentage exercises is markup and markdown problems. For these, you calculate the markup or markdown in absolute terms (you find by how much the quantity changed), and then you calculate the percent change relative to the original value. So they're really just another form of "increase - decrease" exercises.
Step-by-step explanation:
Answer:
45%
Step-by-step explanation:
O= 160
C=88
160-88=72
72 ?
160 100
72 times 100=7200
7200/160=45
Noah and his children went into a grocery store and where they sell apples for
$1 each and mangos for $2 each. Noah has $20 to spend and must buy at
least 9 apples and mangos altogether. If Noah decided to buy 4 apples,
determine the maximum number of mangos that he could buy. If there areno
possible solutions, submit an empty answer.
Answer:
8 is the maximum he can get.
Step-by-step explanation:
Good luck!
How can i explain it and whats the answer?
Answer:
a) (5,3)
Step-by-step explanation:
For the X coordinate, 1+4=5
For the y coordinate 8-5=3
What is the median of the data set?
42, 78, 42, 53, 60
Answer:
53
Step-by-step explanation:
first put it in least to greatest
42,42,53,60,78
the middle value is the median
Write 2,743,000 in scientific notation.
Answer:
2.743 x 10 6
Step-by-step explanation:
Answer:
2.743 x 10^6
Step-by-step explanation:
Slopes of perpendicular lines are _____.
a. negative reciprocals
b. the same
c. reciprocals
d. opposites
Answer:
Correct: Option a. negative reciprocals
Step-by-step explanation:
Perpendicular lines are defined as those who intersect at an angle of 90°.
There is an easy way to find out if two equations of lines correspond to perpendicular lines or not.
If line 1 is
y=m1x+b1
And line 2 is:
y=m2x+b2
The condition for the lines to be perpendicular is that:
m1*m2=-1
Solving for m2:
[tex]\displaystyle m2 = -\frac{1}{m1}[/tex]
As seen, both slopes are negative reciprocals.
Correct: Option a. negative reciprocals
Do 4x and 15 + x have the same value when x is 5? Explain your reasoning
Answer:
Yes, they do have the same value
Step-by-step explanation:
4(5)=20
15+5= 20
Answer: Yes
Step-by-step explanation: 15+5 is 20, and 4(5) is also 20, so 20=20
Katherine is checking the prices of two different catering companies for her wedding reception. Brenda's Bridal Catering charges $300 for a cake plus $18 per person. Sarah's Complete Catering charges $450 for a cake plus $15 per person. Katherine really likes the cake from Sarah's Complete Catering, so she wants to use that company for her reception. Which inequality can be used to find x, the maximum number of people she can invite to the reception so that the total charge from Sarah's Complete Catering is less than the total charge at Brenda's Bridal Catering?
Answer:
Maximum of 50 persons
Step-by-step explanation:
Straight line equation
let the total prices be y
and the number of persons be x
1. Brenda's Bridal Catering charges
the expression for the charges is
y=mx+c
y=18x+300---------------1
2. Sarah's Complete Catering charges
the expression for the charges is
y=mx+c
y=15x+450---------------2
equating 1 and 2 we can then solve for the number of guest as
18x+300=15x+450
18x-15x=450-300
3x=150
divide both sides by 3
x=150/3
x=50
x<=50
Therefore she can invite a maximum of 50 persons
solve for X -6+9x 7x+12
Parallel and Perpendicular lines
Answer:
[tex]=63x^2+6[/tex]
Step-by-step explanation:
[tex]-6+9x\cdot \:7x+12[/tex]
[tex]9x\cdot7x=63x^2[/tex]
[tex]=-6+63x^2+12[/tex]
[tex]=63x^2-6+12[/tex]
[tex]=63x^2+6[/tex]
Find the height of a right rectangular prism with surface area 286 m 2 , length 10 m, and width 8 m.
please help qwq
Help me on this please
Answer:
B. y=1/3x+4
Step-by-step explanation:
The graph shows a line with a slope of -3. Perpendicular slopes is the reciprocal with a different sign (positive or negative). The perpendicular of -3 is 1/3, and B. is the only option with this slope.
Answer:
B. y=1/3x+4
Step-by-step explanation:
You decided to get the Cinemark Movie Pass. It is a flat
fee of $8 and an additional $11.00 per ticket.
Enter the equation of the line in y= mx + b form.
Answer:
y = 11t + 8
Step-by-step explanation:
Since the starting fee is 8 dollars and the additional costs are 11 dollars per ticket, you can write the equation as:
y = 11t + 8
Where "t" represents the amount of tickets bought.