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
AnnyKZ [126]
3 years ago
8

We know the following about the numbers a, b and c:

Mathematics
1 answer:
labwork [276]3 years ago
3 0

Step-by-step explanation:

(a + b)² = 9

(b + c)² = 25

(a + c)² = 81

Taking the square root:

a + b = ±3

b + c = ±5

a + c = ±9

By adding these three equations together and dividing both sides by 2, we get the value of a + b + c.

Possible combinations for a + b + c such that the sum is greater than or equal to 1 are:

a + b + c = (-3 + 5 + 9)/2 = 11/2

a + b + c = (3 − 5 + 9)/2 = 7/2

a + b + c = (3 + 5 + 9)/2 = 17/2

You might be interested in
Verify if 1/2x-2 and g(x) = 2x + 4 are inverses
Triss [41]
They are inverses if f( (g(x)) = x

f((g(x)) =  (1/2) (2x + 4) - 2  = x + 2 - 2 = x

so this proves that g(x) is the inverse of f(x)

the other inverse g((f(x))  should also be = x
5 0
3 years ago
Which sign explains the relationship between m∠1 and m∠2 in the diagram?
Kryger [21]

Answer:

Step-by-step explanation:

m∠1>m∠2

3 0
3 years ago
A school has 63% percent girls and 37%, percent boys. If 23%, percent of the girls wears contacts and 42%, percent of the boys w
Degger [83]

Answer:

30% students

Step-by-step explanation:

Let x be the number of total students of a school.

63% are girls then total number of girls = (0.63)x

37% are boys then total number of boys = ( 0.37)x

Now 23% of girls wear contacts then total number of girls

= (0.63x) × 0.23

=  (0.1449x)

And 42% of boys wear contacts then total number of boys wearing contacts

= (0.37x) ( 0.42)

= (0.1554)x

Total students wears contacts = ( 0.1449x) + (0.1554x)

                                                  = (0.3003x)

Percentage of students wear contacts = \frac{\text{total students wear contacts}}{\text{total students in school}} × 100

= \frac{0.03003x}{x} × 100

= 30%

All 30% students wear contacts.

4 0
3 years ago
Pls HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
timofeeve [1]
I think it would be a im not sure
3 0
2 years ago
Read 2 more answers
What is 15x-7y=-8 in slope intercept form
Kamila [148]

Answer:63

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • The length of a nickel 2.1 cenimeters. what is the combined length of 2 nickels line by side by side
    5·1 answer
  • If a woman making $29,000 a year receives a cost-of-living increase of 2.6%, what will her new salary be?
    9·1 answer
  • Y+9÷2=y-3÷4-(y/3)<br>pls help​
    11·2 answers
  • Which equation relates the number of triangles in the figure (n) to the perimeter of the figure (p)
    7·1 answer
  • What does the line 2x-3y=7 look like
    15·2 answers
  • Consider the statement, "Confidence intervals are underutilized" and explain what the implications might be of using or not usin
    12·1 answer
  • Which ordered pairs are solutions to the inequality 4x+y&gt;−6?
    5·1 answer
  • A pack of 5 smiley stickers cost $6.50. What is the unit price?
    6·1 answer
  • 1. Create an equation of a straight line in slope-intercept form.
    15·1 answer
  • What is the answer of 1 1/6 + 3 5/8<br><br> A. 5 ½<br> B. 5 ⁵⁄₁₄<br> C. 1 ⅙<br> D. 4 ¹⁹⁄₂₄
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!