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
Elena L [17]
3 years ago
15

sum of two numbers is 39. the greater number is 7 more than the smaller number. ( set up an equation )

Mathematics
1 answer:
pochemuha3 years ago
3 0
Let x be the unknown number

2x +7 = 39

2x+7-7 = 39-7

2x = 32

2x/2 = 32/2

x=16

You use the balance method to solve. First, you cancel the +7 by subtracting the 7 ON BOTH SIDES to balance the equation.. After that, you are left with 2x, where you will need to isolate the x by dividing by 2 ON BOTH SIDES to balance it.

Hope this helps
You might be interested in
At a concession​ stand, three hot dog(s) and two hamburger(s) cost ​$8.00​; two hot dog(s) and three hamburger(s) cost ​$8.25. F
qaws [65]

Answer:

$1.5

Step-by-step explanation:

Solve by graphing the system of equations where x = the number of hot dogs and y = the number of hamburgers

> 3x + 2y = 8

> 2x + 3y = 8.25

The solution is (1.5, 1.75)

-- Check attachment for graph

5 0
3 years ago
What is the equation of a line with a slope of -2 that passes through the point (6, 8)?
elena-14-01-66 [18.8K]

Answer:

2x+y = 20

Step-by-step explanation:

The equation for a line is y = mx+b where m is the lope and b is the y intercept

y = -2x+b

substitute the point into x and y

8 = -2(6) +b

8 = -12+b

Add 12 to each side

20 =b

y = -2x+20

Add 2x to each side

2x+y = 20

4 0
3 years ago
Read 2 more answers
A box contains 35 gems, of which 10 are real diamonds and 25 are fake diamonds. Gems are randomly taken out of the box, one at a
USPshnik [31]

Answer:

Probability = 0.504

Step-by-step explanation:

Given

Gems= 35

Real = 10

Fake = 25

Required

Determine the probability of selecting two fakes

The probability can be represented as thus: P(Fake\ and\ Fake)

Using the following probability formula, we have:

P(Fake\ and\ Fake) = P(Fake) * P(Fake)

Each probability is calculated by dividing number of fakes by total number of gems:

P(Fake\ and\ Fake) = \frac{25}{35} * \frac{25-1}{35-1}

The minus 1 (-1) represent the numbers of fake and total gems left after the first selection

P(Fake\ and\ Fake) = \frac{25}{35} * \frac{24}{34}

P(Fake\ and\ Fake) = \frac{5}{7} * \frac{12}{17}

P(Fake\ and\ Fake) = \frac{60}{119}

P(Fake\ and\ Fake) = 0.504

<em>Hence, the required probability is approximately 0.504</em>

7 0
3 years ago
The sum of two numbers is 47. The greater number is 9 more than the smaller number. Which equation can be used to solve for the
Snezhnost [94]

Answer:

Step-by-step explanation:

We are given

X + Y = 47\\and\\Y = X + 9\\\\use \: substitution\\X + (X + 9) = 47

3 0
3 years ago
Read 2 more answers
A ball bounces several times after it is dropped. The graph shows the height of the ball over time.
Anika [276]
I’d be more than happy to help you if you could give me the graph
5 0
3 years ago
Read 2 more answers
Other questions:
  • A group of 75 math students were asked whether they like algebra and whether they like geometry. A total of 45 students like alg
    15·2 answers
  • If 4 is subtracted from twice a number the result is 10 less than the number
    13·2 answers
  • Anyone know how to do this?
    14·1 answer
  • (-3)(16)=<br> What is the question to this answer?
    6·2 answers
  • Point Q is on line segment PR. Given QR = 3x, PQ = x + 6, and
    12·1 answer
  • 44 × 20 × 10 = 440 × 2. but is it true or false ?
    15·2 answers
  • Cho hệ các vector
    15·1 answer
  • 2
    6·1 answer
  • HELP ASAP!!!
    11·1 answer
  • Please answer all parts as I know the answers but need the work to go with them. Thus, I believe the above answers are correct.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!