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shepuryov [24]
2 years ago
9

I will mark brainly, help me with this question please.​

Mathematics
1 answer:
QveST [7]2 years ago
5 0

Answer:

15 and 3

Step-by-step explanation:

<u>Create system of equations:</u>

a=5b

a+b=18

<u>Substitute:</u>

5b+b=18

6b=18

b=3

<u>Substitute:</u>

a=5(3)

a=15

Therefore, the two numbers are 15 and 3

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Choose the best description for the real number 4 point 6 repeating.
adell [148]
Rational because it is a repeating decimal
8 0
2 years ago
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1/3(4+18)-2 to the second power
skad [1K]

Answer:

3.33333333333

or

10          

 —— = 3.33333

 3            

Step by step solution :

Step  1  :

Equation at the end of step  1  :

  1          

 (— • 22) -  22

  3          

Step  2  :

           1

Simplify   —

           3

Equation at the end of step  2  :

  1          

 (— • 22) -  22

  3          

Step  3  :

Rewriting the whole as an Equivalent Fraction :

3.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  3  as the denominator :

         22     22 • 3

   22 =  ——  =  ——————

         1        3  

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

3.2       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

22 - (22 • 3)     10

—————————————  =  ——

      3           3

Final result :

 10          

 —— = 3.33333

 3            

3 0
3 years ago
A practice field is in the shape of a rectangle. The area of the practice field is represented by 5x^2 + 30x -7xy -42y. Find the
fredd [130]

Answer:

length and width are x + 6 and 5x - 7y

Step-by-step explanation:

5x² + 30x - 7xy - 42y

= 5x(x + 6) - 7y(x + 6)

= (x + 6)(5x - 7y)

so

length and width are x + 6 and 5x - 7y

8 0
2 years ago
Mary is planning to provide online math and french language tutoring sessions. The math session will be 45 minutes long, and the
alisha [4.7K]

Answer:

  • 3/4m + 1/2f ≤ 30
  • f ≤ 30

Step-by-step explanation:

  • Math session = 45 min = 3/4 hr
  • French session = 30 min = 1/2 hr
  • Number of math sessions = m, total math hours = 3/4m
  • Number of French sessions = f, total French hours = 1/2f

<u>Total hours constraint:</u>

  • 3/4m + 1/2f ≤ 30

<u>Number of session constraint:</u>

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<u>So the system is:</u>

  • 3/4m + 1/2f ≤ 30
  • f ≤ 30

4 0
3 years ago
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What is 2/3 as a percent with one decimal place​
Doss [256]
2/3 is .666666 so that would be the percent
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