1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alenkinab [10]
4 years ago
13

Find the product of each sum and difference. (21+9)(21-9)

Mathematics
1 answer:
Natalka [10]4 years ago
8 0

30 12

Step-by-step explanation:

21 + 9 equals 30 21 - 9 equals 12

You might be interested in
You rented a car on vacation to go sightseeing for a day. You had to pay $50 for the day and $.15 per mile, along with $35 for g
stellarik [79]

The number of miles for which the car has been driven if one paid $122.50 as in the task content is; 2.5 miles.

<h3>For how many miles was the car driven?</h3>

It follows from the task content that the total amount paid was; $122.50.

Hence, after subtraction the constant charges, for the day and for gas, the remainder is;

$122.50 - $50 - $35

= $37.50.

Ultimately, if the charge per mile is $15, then the number of miles driven is; $37.50/$15

= 2.5 miles.

Read more on cost per unit;

brainly.com/question/19493296

#SPJ1

3 0
2 years ago
Salazar assigns the same number of homework questions each school day. The ratio table below shows the total number of homework
fgiga [73]

Answer:

B

Step-by-step explanation:

First, we have to find the rate of change for this problem. To do this, we subtract any two numbers of days and the coordinating two total questions. Let's just use the first two rows. 8-4=4, and 40-20=20. For every 4 days, he answers 20 questions. We can further simplify this by dividing both sides by 4. 4/4=1, and 20/4=5. For every 1 day, he answers 5 questions. Now, to find 16 days, we just multiply both sides by 16. 16*1=16 and 16*5=80. For every 16 days, he answers 80 questions. 80 is our answer.

Hope this helps!

6 0
2 years ago
What is the volume of the cylinder?
Bess [88]
The answer is d hope it helps
7 0
4 years ago
Your answer
yan [13]

Answer:

Step-by-step explanation:

With the initial statement, when the trees  become very old, they stop flowering, it would be expected that only trees that has stopped flowering are to be considered because they are assumed to be old trees.

But with the additional information, we had to choose trees that were

no more than 240 cm tall, the choice of trees now is only those who are not more than 240 cm tall. This implies that the choice of trees to be considered now may be old or young, once they meet the required height.

6 0
3 years ago
Explain how to use the associative property of multiplication to simplify the following expression and find the final value: (2
bekas [8.4K]
The associative property of multiplication deals with moving the parentheses around different terms. The numbers remain in the same order. If you move the numbers’ order around, you’re using the commutative property. (They “commute” to a different place in the expression).

So 2(8 * 5) is regrouped and simplified
2(8 * 5) = 2(40) = 80
8 0
3 years ago
Read 2 more answers
Other questions:
  • Anne's par scores for five rounds of a golf game were 7, -1, 6, 0, and -8. what was her final par score?
    14·1 answer
  • Can someone help me please
    14·2 answers
  • So every week in my class we do a riddle and if you’re able to solve 3 of these correctly in a row you get a prize (homework pas
    6·2 answers
  • Does anyone know what 2/6 plus 1/8 is?
    8·1 answer
  • Use the Line Tool to graph the equation. 2x−7y=14
    14·1 answer
  • Which model BEST represents each of the following scenario:
    13·1 answer
  • HELPPPPP MEEEEEEE NOWWWWWWWWW HELPPPPPPPPPPPP
    11·2 answers
  • Can someone help me please
    9·1 answer
  • 36.8 is the sum of r and 13.8 <br> x=
    7·1 answer
  • If Rachel can read 10 pages in 12 minutes how long does it take her to read 8 pages
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!