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
ololo11 [35]
2 years ago
11

Find the value of two numbers is their sum is 21 and their difference is 3

Mathematics
2 answers:
kobusy [5.1K]2 years ago
8 0

Hello from MrBillDoesMath

Answer:   12, 9

Discussion:

Let x be the first number and y the second number. The form the problem statement:

x + y = 21

x - y = 3


Add the two equations. This gives:

(x + x ) + ( y-y) = 21 + 3 =>

2x + 0 = 24 =>

x = 12

Since x -y =3, substituting in the value of x gives,  12 - y = 3 so y = 9


Thank you,

Mr. B

inn [45]2 years ago
4 0
Answer to equation: 18
You might be interested in
A 10-pound block of ice melts at a rate of 3% per hour. Find the weight of the block of ice after 1 day.
mylen [45]

Answer:

The weight of the block of ice after 1 day is of 4.81 pounds.

Step-by-step explanation:

Equation for exponential decay:

The equation that models an amount after t hours, subject to exponential decay, is given by:

A(t) = A(0)(1 - r)^t

In which A(0) is the initial amount and r is the decay rate, as a decimal.

A 10-pound block of ice melts at a rate of 3% per hour.

This means that A(0) = 10, r = 0.03

So

A(t) = A(0)(1 - r)^t

A(t) = 10(1 - 0.03)^t

A(t) = 10(0.97)^t

Find the weight of the block of ice after 1 day.

One day has 24 hours, so this is A(24).

A(24) = 10(0.97)^{24} = 4.81

The weight of the block of ice after 1 day is of 4.81 pounds.

6 0
2 years ago
Whats the answer someone help​
Tems11 [23]
The answer would be A
7 0
3 years ago
What is the average daily temperature for all ten years?<br> ____ degrees
sveta [45]

Answer:

the average is 53.6

6 0
3 years ago
Find the equation of the line that has a slope of 5 and passes through the point (-9,6)
Aleks [24]

Answer:

y-6=5(x-(-9))

Step-by-step explanation:

y=5x+51 if u need y=mx+b. Plug and chug basically

5 0
3 years ago
PLEASE HELP! [99 POINTS] !! SERIOUS ANSWERS ONLY !!!
umka21 [38]
Hello!

We can find out our answer by plugging in the point (1,1) to see which equation works.

y=1.4(1.2)≠1
y=1.2≠1
y=0.5+0.3≠1
y=0.2+1.2≠1

As you can see, none of these answers are correct. You could make the last equation true by switching 0.2 to -0.2. It may have been a typo, so I would say the best answer is D.

I hope this helps!
5 0
3 years ago
Read 2 more answers
Other questions:
  • During a sale a dress decreased in price from $60 to $48 what was the percent of decrease
    11·1 answer
  • Which function has real zeros at x = 3 and x = 7?
    13·1 answer
  • ANSWER FAST PLZ 25 POINTS!!!!!!!!!!
    11·1 answer
  • A corporation reported profit of approximately $1500 million with approximately $24,300 million in revenues. Compare the profit
    5·1 answer
  • Hey there people Im doing a poll
    13·1 answer
  • A loan of $100,000 is made today. The borrower will make equal repayments of $3568 per month with the first payment being exactl
    15·1 answer
  • The panel for a political forum consists of four Democrats, 5 republicans, 3 independents in how many orders can they be seated
    10·2 answers
  • one renting a movie he started the movie at 11:43 p.m. and it was 2 hours for 45 minutes long when did the movie End​
    14·1 answer
  • What is the value of f?
    10·1 answer
  • Test help picture below problem 11
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!