Mathematics Middle School

30 points to whoever gets this right ( answer asap please )

∠A and ∠B are supplementary angles. If m∠A = ( x − 9 )∘ and m∠B = ( 7 x + 21 ) ∘ , then find the measure of ∠B.

Answers

Answer 1

Answer:

168°

Step-by-step explanation:

Related Questions

Nathan asks his friends what fraction of an hour it takes each of them to get ro school. Use the data to create a line plot

Answers

Answer:

The order of the line graph is:

two 1/3     three 1/2           five 2/3

--------------------------------------------------------

Step-by-step explanation:

You need to find the common denominator for the fractions. In this case it would be 6.

1/3 = 2/6

1/2= 3/6

2/3=4/6

Then you count how many of each there are and create a line graph.

The average in-state tuition in Florida for the 2018-2019 school year
was about $13,700. If the tuition is expected to increase by 15%, what is
the expected tuition for the 2019-2020 school year?

Answers

Answer:

$15755

Step-by-step explanation:

x=2019-2020 tuition

y=2018-2019 tuition

x= y + (15% of y)

x= 13700+ (15/100 × 13700)

x= 13700+ (2055)

x= 15755

There are 9 men and 13 women running a race. What is the ratio of the number of male runners to the total number of runners?

Answers

Answer: simply 9:13

Step-by-step explanation:

9 and 13 cannot be simplified any more than they are

The ratio to the number of male runners to total number of runners is, 9:22. 9 representing the number of male runners running the race. And 22 for the total numbers which is made up of female and male runners (13+9).

What is the horizontal distance from (12, −2) to (−13, −2)?

−25 units
−1 unit
1 unit
25 units

Answers

Answer:

25

Step-by-step explanation:

the horizontal distance is the difference between the x coordinates:

12 - (-13) = 25

HURRY PLEASSE! Find the x-value of the solution in the following system of equations.



y – x = - 4
y = - 2x + 2

Group of answer choices

x = 2

x = 4

x = -5

x = -1

Answers

Step-by-step explanation:

Substitute the second equation into the first equation to eliminate y:

y - x = -4

-2x + 2 - x = -4 (Substitute y = -2x + 2)

-3x + 2 = -4

-3x = -6

x = 2

Therefore, the solution is x = 2.

2 the answer is 2!!!! To find the answer solve the system of equations

A local jewelry store sells class rings, which it purchases for $60 each. The store engraves a name and date on the ring and sells it using a markup rate of 340%.

What is the markup rate in decimal form?

The markup rate is the constant of proportionality in the equation y=kx
. Write an equation that can be used to find the markup on the cost x
of a ring.

Use the equation to find the markup amount by substituting the cost of a ring for x

.What is the retail price of a ring?

During graduation week, the store is going to reduce the price to $184.80.

Calculate what percent the sale price is of the retail price.

Think of the retail price of the ring as 100%. How does the sale price compare to the retail price? What does this tell you about the markdown rate?

What is an equation in the form y=kx
that relates the sale price to the retail price x
?

Answers

The markup rate in decimal form is 3.40 (340% is equivalent to multiplying by 3.40).

The equation that can be used to find the markup on the cost x of a ring is: Markup = 3.40x.

If the store purchases the rings for $60 each, the markup amount would be:

Markup = 3.40 x $60 = $204

The retail price of a ring would be the cost plus the markup amount:

Retail price = Cost + Markup = $60 + $204 = $264

During graduation week, the store is reducing the price to $184.80. To find what percent the sale price is of the retail price:

Sale price percentage = (Sale price / Retail price) x 100%
Sale price percentage = ($184.80 / $264) x 100% = 70%

The sale price is 70% of the retail price. This means that the markdown rate is 30%.

An equation in the form y=kx that relates the sale price to the retail price x is:

Sale price = k x Retail price

To find k, we can use the information given in the problem that the sale price is 70% of the retail price:

0.70 Retail price = k x Retail price

Simplifying this equation, we get:

k = 0.70

Therefore, the equation in the form y=kx that relates the sale price to the retail price x is:

Sale price = 0.70 x Retail price

Brainliest answer, please.

Help I just don't understand

Answers

the coordiates are (0,9) and (1,6) and (2,4) and (3,3) and (8,1) hope the picture helps

How long (in minutes) would it take to fill a kiddie swimming pool with 40 gallons of water if the hose dispenses water at a rate of 1 gallon every 30 seconds?
minutes

Answers

I think 20 hours because the rate is 1gallon=30sec
So divided by 2 and
2g=1 min so
The answer would be it would take 20min to fill a 40 gallon pool

3 x ten to the nine power

Answers

Answer:

3000000000

Step-by-step explanation:

The exponent is 9, making it 10 to the power of 9. As the exponent is positive, the solution is a number greater than the origin or base number. To find our answer, we move the decimal to the right 9 time(s)

Answer: 30

Step-by-step explanation:

Timothy built a wooden square-based pyramid for a history class project on Egypt. He needs to buy enough gold paper to cover the entire surface. The base length is 2.5 ft and the slant height is 1.5 ft.



What is the minimum amount of gold paper he needs to purchase?

Type your answer in the box. Type only the number. Do NOT include any words or letters.

Round to the hundredths place if needed.

ft2

Answers

Answer: Is it not 16? If I try a weird calculation I might even get 13.75 for some reason.

Step-by-step explanation: Pick what you think is right I'm not sure.

Answer:

13.75

Step-by-step explanation:

                                                       

Find the area of the both shapes.

Answers

Answer:

648cm² is the correct answer for the kite

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