12+3y+y=?
What is the answer?

Answer:

90°

Step-by-step explanation:

step 1

Find the measure of angle b

we know that

(m∠b+90°)=124° ----> by vertical angles

so

m∠b=124°-90°

m∠b=34°

step 2

Find the measure of angle c

(m∠c+124°)=180° ----> by supplementary angles (form a linear pair)

m∠c=180°-124°

m∠c=56°

step 3

Find the measure of angle a

m∠a=m∠c ----> by vertical angles

so

m∠a=56°

step 4

Find the value of m∠ a + m∠b

m∠a=56°

m∠b=34°

m∠ a + m∠b=56°+34°

m∠ a + m∠b=90°

The percent change is 40%

Step-by-step explanation:

The percent change is given by the formula

[tex]Percent\ change=\frac{New\ value-Original\ value}{Original} * 100[/tex]

Here

New value = 70

Original value = 50

Putting the values in the formula

[tex]Percent\ change=\frac{70-50}{50}*100\\=\frac{20}{50}*100\\=0.4*100\\=40\%[/tex]

The percent change is 40%

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Answer:

[tex]-0.4, -\frac{9}{16}, -1\frac{3}{8}, -1.55[/tex]

Step-by-step explanation:

The list of numbers given:

[tex]-1\frac{3}{8}, -0.4, -1.55, -\frac{9}{16}[/tex]

We need to arrange from greatest to least.

In order to arrange the numbers in descending order we will find the equivalent decimal value of each number.

a)[tex]-1\frac{3}{8}=-1.375[/tex]

b) [tex]-0.4[/tex]

c) [tex]-1.55[/tex]

d) [tex]-\frac{9}{16}=-0.5625[/tex]

Arranging the numbers in descending order

[tex]b>d>a>c[/tex]   [since all the numbers are negative, so the number closest to 0 is the greatest]

Thus the correct order from greatest to least is:

[tex]-0.4, -\frac{9}{16}, -1\frac{3}{8}, -1.55[/tex] (Answer)

Answer:

The two cars are at the distance of 21 miles apart .

Step-by-step explanation:

Given as :

The car travel due north to the distance  = 12 miles

The car travel due south to the distance = 9.12 miles

let the distance between the two cars = x miles

So, the total distance between the cars = The distance of north going car + the distance of south going car

Or,  the total distance between the cars = 12 miles + 9.12 miles

or,  the total distance between the cars =  21.12 miles ≈ 21 miles

I.e the total distance between the cars = 21 miles

Hence The two cars are at the distance of 21 miles apart . Answer

Answer:

y=-7

x=6

Step-by-step explanation:

If you subtract 3x from both equations, you get -4y=28, which means that y=-7. When you substitute it back in, you get the x-value of 6.

Answer:

D. [tex]3m^2+m-5[/tex]

Step-by-step explanation:

A trinomial expression is a polynomial expression with three terms.

The term with the highest power of variable is called the leading term and the co-efficient of this term is called the leading co-efficient.

The alone number without any variable in the expression is called the constant.

Example of a trinomial:

[tex]5x^2+2x+4[/tex]

Leading co-efficient = 5

Constant = 4

A trinomial with a leading coefficient of 3 and a constant term of -5 from the given choices is:

D. [tex]3m^2+m-5[/tex]

Answer:

2 scrapbook pages

I found the answer online

Aylin can create a maximum of 19 scrapbook pages by dividing the total number of items by the number of items on each page.

Aylin wants to set up all the pages of her scrapbook in the same way, with a combination of photos and newspaper clippings on every page.

She wants to make sure that no items are left over.

To find the greatest number of scrapbook pages Aylin can create, we need to divide the total number of items -

= 18 photos + 20 newspaper clippings

= 38 items

Now,

Since she wants each page to have the same combination, we can find the greatest common divisor (GCD) of 18 and 20, which is 2.

Therefore, Aylin can create a maximum of 38/2 = 19 scrapbook pages.

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Answer:

Average Speed to complete the journey = 80 km/h

Step-by-step explanation:

Given,

The distance between Sydney and Goulburn = 200 kilometer.

Time to complete the journey = 2 hour 30 minutes

Converting the time into minutes -

2 hour 30 minutes

= (2 x 60) minutes + 30 minutes

= 120 minutes + 30 minutes

= 150 minutes

We know, to determine average speed, we have to divide the distance by time.

Therefore, Speed = [tex]\frac{Distance}{Time}[/tex]

Speed = [tex]\frac{200 km}{150 minutes}[/tex]

Speed = 1.33 km/minutes

Speed = (1.33 km x 60) km/hour (To convert it to hour, we have to multiply by 60)

Average Speed per hour = 80 km/h

Step-by-step explanation:

In slope intercept form?

Subtract 11x from both sides to get:

13y = -11x + 8

Then divide the entire thing by 13

[tex]y = \frac{ - 11}{13}x + \frac{8}{13} [/tex]

is your new equation

The graph of the line that contains the point ( − 6 , 1 ) and has a slope of 5 is shown below in the attachment.

How to graph a line?

To graph a line with a given point (-6, 1) and a slope of 5 without explicitly finding the equation, you can start from the given point (-6, 1) and use the slope (5) to find other points.

Move up by 5 units (rise) and to the right by 1 unit (run) from the given point, and you'll get another point on the line. Repeat this process to plot multiple points and then connect them to graph the line.

The graph of the line is attached below.

Answer:

2,300

Step-by-step explanation:

see attached to identify the hundreds digit.

How we round the hundreds digit depends on the number in the tens place.

If the number in the tens places is less than 5, then we keep the hundreds digit the same (i.e we round down)

If the number in the tens place is greater or equal to 5, then we increase the hundreds digit by 1 (i.e round up)

in this case, the digit in the tens place is 1 (i.e less than 5) hence we round down by keeping the hundreds place the same

we end up with 2,300

2,319 rounded to the nearest hundreds is 2,300.

To round the number 2,319 to the hundreds place, follow these steps:

Therefore, the answer is 2,300.

Answer:

16

Step-by-step explanation:

1,2,4,5,8,10,20,25,40,50,100,125,200,250,500,1000

Career clusters are groups of related careers. In the example given, careers in biological sciences like microbiologist, ecologist, neurologist, and forensic scientist form one cluster, while allied health professions such as medical technician, medical examiner, and neurophysiologist form another. Matching careers to clusters involves identifying commonalities such as educational requirements, tasks, and industry.

It looks like you are trying to match careers with specific career clusters. Career clusters represent a group of careers that share common features. If we consider biological sciences, we'd have a cluster including careers such as a microbiologist, ecologist, neurologist, and forensic scientist. These professions are heavily involved in studying living organisms and their environments.

On the other hand, if we consider allied health, this would be another cluster including careers like medical technician, medical examiner, and neurophysiologist. These professions are more orientated towards applied sciences in healthcare.

I hope this helps you understand how to match careers with their respective career clusters. A good approach is to identify commonalities between various jobs such as their educational requirements, day-to-day tasks, and the industry they belong to.

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Answer:

.5

Step-by-step explanation:

1 divided by 2 is .5.

Answer:

0.5

Step-by-step explanation:

1/2 is equal to 5/10, and 5/10 is equal to 0.5.

Answer:

the slope is 4

Step-by-step explanation:

y=mx+ c

m=4

c=-5

Answer:y intercept :5

Step-by-step explanation:

slope-4

Answer:

First Side  = 21 units

Second side = 21 units

Third side  = 21 units

Step-by-step explanation:

Here, the three sides of the equilateral triangle are:

(2 x-7) cm , ( x + y - 9) cm and ( y + 5) cm

Now, a triangle is said to be an EQUILATERAL TRIANGLE if all three sides of the triangles are equal in the measure.

⇒ For the given triangle to be equilateral:

(2 x-7)   =  ( x + y - 9)  =  ( y + 5)

Consider third and second term, we get:

x + y -9  = y + 5

or, x - 9  = 5  

⇒  x = 9 + 5  = 12, or x = 14

Also,from first and second   term :

(2 x-7)  =  ( x + y - 9)  

⇒ 2(14) - 7 =  (14 + y) - 9

⇒ 28  - 7 -14 + 9 = y

or, y = 16

Hence, First Side =  2 x - 7 = 2(14) - 7 = 21 units

Second side = x + y - 9 = 14+ 16  - 9 = 21 units

Third side =  y + 5 = 16 + 5 = 21 units

Answer:

Part A: Option C

Part B: Option B

Step-by-step explanation:

Part A:  

We have to find the equation of a straight line having x-intercept at (3,0) and y-intercept at (0,2).

Now, using intercept form of straight line equation we can write the equation of the required straight line is [tex]\frac{x}{3} + \frac{y}{2} = 1[/tex]

⇒ [tex]\frac{y}{2} = 1 - \frac{x}{3}[/tex]

⇒ [tex]y = - \frac{2}{3} x + 2[/tex]  

So, option C is correct. (Answer)

Part B:  

See the graph of the straight line provided.

The straight line passes through the points (10, 80) and (20, 100)

Therefore, the slope of the straight line is given by [tex]\frac{100 - 80}{20 - 10} = \frac{20}{10} = 2[/tex]

therefore, option B is correct. (Answer)

Answer:

( - 1, 1 )

Step-by-step explanation:

Given the 2 equations

3x - y = - 4 → (1)

x + y = 0 → (2)

Subtract y from both sides in (2)

x = - y → (3)

Substitute x = - y into (1)

- 3y - y = - 4, that is

- 4y = - 4 ( divide both sides by - 4 )

y = 1

Substitute y = 1 into (3)

x = - 1

Solution is (- 1, 1 )

The solution to the system of equations 3x - y = -4 and x + y = 0 is found by substitution, resulting in the solution set (x, y) = (-1, 1).

To find the solution to the equations 3x - y = -4 and x + y = 0, you can use the method of substitution or elimination. Since the second equation easily gives us y in terms of x (that is, y = -x), we can substitute this into the first equation.

Substitute y = -x into the first equation: 3x - (-x) = -4.

Simplify: 3x + x = 4x

hence, 4x = -4

Divide both sides by 4 to solve for x: x = -1.

Now substitute x = -1 into y = -x to find y: y = -(-1) = 1.

The solution to the system of equations is (x, y) = (-1, 1).

Answer:

Step-by-step explanation:

i think its 500%

but im not sure

because 20 divided by 4 = 5

and 5.0 = 500%

Answer:

 The percent change is 400%

Explanation:

We know that percentage change is given by the

[tex]\frac{change in value}{absolute value of the original value} \times 100[/tex]

i.e we find the difference between the original value and current value and then divide it by original value and multiply the obtained value with 100.

a negative percentage change indicates increase in value.

so we get 4 - 20 = -16

[tex]\frac{-16}{4}[/tex] = -4

[tex]-4 \times[/tex] 100 = -400

hence there is an increase of 400% in the percentage which is the required percentage.

Answer:

The radioactive substance will decay in 17.70 hours .

Step-by-step explanation:

Given as :

The rate of decay of radioactive substance = 4 %  per hour

Let The original weight of substance = w

The final weight of substance = [tex]\frac{w}{2}[/tex]

Let the hours for decay of substance = n

Now,

The weight of substance after n years = The original weight of substance × [tex](1- \dfrac{\textrm Rate}{100})^{n}[/tex]

or,

[tex]\frac{w}{2}[/tex] = w × [tex](1- \dfrac{\textrm 4}{100})^{n}[/tex]

Or, [tex]\frac{1}{2}[/tex] = [tex](1- \dfrac{\textrm 1}{25})^{n}[/tex]

or,  [tex]\frac{1}{2}[/tex] = [tex](\dfrac{\textrm 25-1}{25})^{n}[/tex]

or,  [tex]\frac{1}{2}[/tex] = [tex](\dfrac{\textrm 24}{25})^{n}[/tex]

Taking log both sides :

Log  [tex]\frac{1}{2}[/tex] = Log [tex](\dfrac{\textrm 24}{25})^{n}[/tex]

So, Log [tex]\frac{1}{2}[/tex] = n × Log [tex]\frac{24}{25}[/tex]

∴ - 0.301 =  n × ( - 0.017 )

So , n = [tex]\frac{0.301}{0.017}[/tex]

I.e n = 17.70  hours

Hence The radioactive substance will decay in 17.70 hours . Answer

Answer:

0.22 hours

Step-by-step explanation:

Half life is defined as the time taken by a radioactive material to decay to half of its original value.

Mathematically, half-life (t1/2) = ln2/¶ where ¶ is the decay constant.

Before we can get the half life, we need to get the decay constant first. To get ¶, we will use the radioactivity formula. According to the formula,

N/No = e^-¶t where;

N/No is the fraction of the final substance after decay the the original value of the substance = 4% = 1/25

t is the time of decay = 1hour

Substituting into the formula to get the decay constant we have;

1/25 = e^-1¶

Applying ln to both sides, we have;

ln 1/25 = lne^-¶

ln1/25 = -¶

-3.22= -¶

¶ = 3.22

The decay constant is 3.22

Half life = ln2/3.22

Half life = 0.22hours

It will take the substance 0.22hours before it changes to half of its original weight.

Answer:

Step-by-step explanation:I could help

Answer:

(17.42 ; 22.38)

Step-by-step explanation:

To construct a confidence interval we use the following formula:

ci = (sample mean) +- z*(sd)/[n^(1/2)]

The sample mean is 19.9 and the standard deviation is 6. The sample has a n of 16. We have to find the value of z which is the upper (1-C)/2 critical value for the standard normal distribution. Here, as we want a confidence interval at a 90% we have (1-C)/2=0.05 we have to look at the 1-0.05=0.95 value at the normal distribution table, which is 1.65 approximately. Replacing all these values:

ci: (sample mean - z*(sd)/[n^(1/2)] ; sample mean + z*(sd)/[n^(1/2)])

ci: (19.9 - 1.65*6/[16^(1/2)] ; 19.9 + 1.65*6/[16^(1/2)])

ci: (19.9 - 9.9/4] ; 19.9 + 9.9/4)

ci: (19.9 - 2.48 ; 19.9 + 2.48)

ci: (17.42 ; 22.38)

To find a 90% confidence interval for the mean time, we can use the formula C-I = x ± z * (σ/√n). Using the given sample mean, sample standard deviation, and sample size, the 90% confidence interval is approximately (17.43, 22.37) minutes.

To find a 90% confidence interval for the mean time, we can use the formula:

C-I = x ± z * (σ/√n)

Where:

Since the population standard deviation is unknown, we can use the sample standard deviation as an estimate. The z-score corresponding to a 90% confidence level is approximately 1.645.

Plugging in the given values:

C-I = 19.9 ± 1.645 * (6/√16)

C-I = 19.9 ± 1.645 * 1.5

C-I = 19.9 ± 2.46875

Therefore, the 90% confidence interval for the mean time is approximately (17.43, 22.37) minutes.

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Answer:

An independent clause is a group of words that contains both a subject and a predicate. It expresses a complete thought and can stand alone as a sentence. It can also be joined to other dependent or independent clauses to make a more interesting and complex sentence.

Step-by-step explanation:

Answer:

Gas mileage is the number of miles you can drive

Gas mileage is the number of miles you can drive on a gallon of gasoline. A test of a new car results in 600 miles on 20 gallons of gas.

Step-by-step explanation:

Plzzz give me brainllest

Danielle earned $969 last week.

Step-by-step explanation:

Base salary per week = $650

Commission = 7.25%

Worth of electronics sold = $4400

Commission = 7.25% of 4400

[tex]Commission = \frac{7.25}{100}*4400\\Commission = \frac{31900}{100}\\Commission = \$319[/tex]

Earning of last week = Base salary per week + commission

[tex]Earning\ of\ last\ week=650+319=\$969[/tex]

Danielle earned $969 last week.

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Using combinations in mathematics, it's found that there are 4 different 3-topping pizzas possible from a selection of 4 toppings, since the order of toppings on a pizza does not matter.

Combination Calculation for Pizza Toppings

When considering the number of different 3-topping pizzas possible from 4 choices, one must use combinations to solve this problem. A combination is a selection of items where the order does not matter, which fits our scenario since the order of toppings on a pizza does not change the pizza's identity. In mathematical terms, we look for the number of combinations of 4 items taken 3 at a time, which is denoted as 4C3.

The formula for combinations is:

C(n, k) = n! / (k!(n-k)!), where n is the total number of items, k is the number of items to choose, and ! denotes a factorial.

Thus, for our pizza topping problem, this becomes:

4C3 = 4! / (3!(4-3)!) = (4×3×2×1) / ((3×2×1)×1) = 24 / 6 = 4 different 3-topping pizzas.

Therefore, there are 4 different ways to select 3 toppings from a choice of 4.

Answer:

The height of First Copy is 20 cm.

Step-by-step explanation:

Given:

Original Height = 25 cm

First copy is reduce to 80% of Original height.

Therefore to find the height of first copy can be find out by multiplying 80 with original height and then dividing by 100.

∴ Height of First Copy = [tex]\frac{80}{100} \times \textrm{original height}= 0.8\times 25 cm = 20cm[/tex]

Hence Height of first copy is 20 cm

Now Another copy is reduce to 85% of First Copy.

Therefore to find the height of another copy can be find out by multiplying 85 with first copy height and then dividing by 100.

∴ Height of Another Copy = [tex]\frac{85}{100} \times \textrm{first copy height}= 0.85\times 20 cm = 17cm[/tex]

Hence Height of Another copy is 17 cm

Answer:

To find the height of the first​ copy,

multiply 0.8 by 25.

The height of the first copy is

20 cm.

To find the height of the second​ copy,

multiply 0.85 by the height of the first copy.

The height of the second copy is

17 cm.

Step-by-step explanation:

Answer:

They are equal.

Step-by-step explanation:

-4/5=-8/10