MATHEMATICS HIGH SCHOOL

Which properties can be used to solve 7y − 15 = −29? Select all that apply. A. Identity Property of Multiplication B. Addition Property of Equality
C. Distributive Property
D. Inverse Property of Multiplication
E. Commutative Property of Addition

Answers

Answer 1
Answer:

The properties that can be used to solve 7y - 15 = -29 are

Addition property of equality and inverseproperty of multiplication.

Given equation is 7y - 15 = -29.

We will solve for y and see which of the given following properties are applied.

What is addition property of equality and the inverse property of multiplication?

Addition property of equality

If two expressions are equal to each other, and you add the same value to both sides of the equation, the equation will remain equal.

Inverse property of multiplication

It states that every non-zero x multiplied with 1/x will equal 1.

Solve for y.

7y - 15 = -29

We will add 17 on both sides of the equation.

7y - 15 + 15 = -29 + 15

7y = -14

Now, multiply 1/7 into both sides of the equation.

7y / 7 = -14 / 7

y = -2

While solving for y we see that we have to use the addition property of equality and inverse property of multiplication.

Learn more about properties for solving equations here: brainly.com/question/13282104

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Answer 2
Answer:

Answer:

A and E

Step-by-step explanation:

Other 2 wouldn't make sense

Only definite of A

Addition Property of Equality  ----If two expressions are equal to each other, and you add the same value to both sides of the equation, the equation will remain equal.

Commutative property of addition- changing the order of the numbers we are adding, does not change the sum. Here's an example of how the sum does NOT change, even if the order is changed

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On her first three 5-point math quizzes, Ami’s scores were 4,3, and 5. She will take 3 more quizzes this semester. What three scores would give her an average that is a whole number? A repeating decimal?
What is the density ?

How do you solve this ?

Answers

Do 4×5 to the second power

A factory produces 1,250,000 toys each year. The number of toys is expected to increase by about 150% per year. Which model can be used to find the number of toys being produced, n (in millions), in t years? A. n= 2.5(1.5)/t, t cannot = 0
B. n= 1.5t^2 + 1.25
C. n= 1.5t + 1.25
D. n= 1.25(2.5^t)

Answers

For this case we have a function of the form:

Where,

n0: initial amount (in units of millions)

b: growth rate

t: time in years

Substituting values we have:

Answer:

the number of toys being produced, n (in millions), in t years is:

D. n = 1.25 (2.5 ^ t)

Answer:

The correct option is D.

Step-by-step explanation:

It is given that the factory produces 1,250,000 toys each year.

In the function n (in millions), So the initial production is 1.25 million.

The increasing rate is 150%. THe increasing rate is 1.5.

The function is defined as,

n=n_0(1+r)^t

Where n₀ is initial production, r is rate and t is time.

n=1.25(1+1.5)^t

n=1.25(2.5)^t

Therefore the correct option is D.

Which fraction is equivalent to 7/8 ?

Answers

So from 7/8 = 35/40 , 35 is the answer
Many fraction equivalent to 7/8
7/8•2=7/4
7/8•3=21/8
7/8•4=7/2
7/8•5=35/8
7/8•6=21/4
7/8•7=49/8
7/8•8=7
7/8•9=63/8
7/8•10=35/4

your school sells tickets for its winter concert. Student tickets are $5 and adult tickets are $10. If your school sells 85 tickets and makes $600, how many of each ticket did they sell?

Answers

Let s be the number of student tickets and a be the number of adult tickets.
s + a = 85; a = 85 - s
Also,
5s + 10a = 600

Substituting a from the first equation
5s + 10(85 - s) = 600
-5s = -250
s = 50
a = 85 - 50 = 35
The school sold 50 student tickets and 35 adult tickets.

How are the greater than, less than, and equal to symbols useful?

Answers

they are called relation symbols
they tell how something relates to something else

greater than tells ou that the the result must be more than, but not eqal to that numberd so example, we have to have something that flys higher than that bridge (100ft) but it cannot fly 100 or else it will crash

less than tells you that you must be less than, but not euqal to. example
 this thing must be less than 7 feet tall to fit under the doorway, it cannot be 7 feet or else it wont fit

equal to is an exact amount, nothing more or less
we have to have a screw that is this big, nothing more or less



less and greater than is nice since if you found a solution and you wanted to notate it, example
if the naswer is any number less than 10, it would be nicer to write x<10 instead of listing all numbers less than 10 since they could get very close example 9.999999999 forever
greater is the same, any number bigger than 30, you woul dhave to include 30.0000000001 and smaller which is hard, but with the x>30, it is easier

the equals just shows equality, this is equal to this, period
They are very useful because they can help many people understand which number is either bigger or smaller and also equal. 

These symbols are found useful because they are used in many equations to determine weather a number needs to be subtracted or added, this means they helps you determine if you have to use subtraction or multiplication.

These are called Relation Symbols.


EXAMPLE BELOW :

20≥10+10≤20  , this means 10 + 10 = 20 which is greater than or equal to 20 ≥
__________________________________________________________

Keep in my that the alligator(,≥,≤,etc) loves to eat the bigger number , which looks like the = ∠20 , if it is small the gator doesn't want is , looks like this = 10∠.
_____________________________________________________________

Those examples and reasoning's were my back up for my answer. 




I really hope that this help you a lot.

Use the quadratic formula to solve 2y2 – 10y + 8 = 0.

Answers

2y^2-10y + 8 = 0\n \na=2, \ b=-10 , \ c= 8 \n \n\Delta =b^2-4ac = (-10)^2 -4\cdot2\cdot 8 = 100-64=36 \n \nx_(1)=(-b-√(\Delta) )/(2a)=(10-√(36))/(2\cdot 2 )=( 10-6)/(4)=(4)/(4)= 1\n \nx_(2)=(-b+√(\Delta) )/(2a)=(10+√(36))/(2\cdot 2 )=( 10+6)/(4)=(16)/(4)= 4
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