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
Mazyrski [523]
3 years ago
14

On a school trip, the ratio of the teachers to students is 2:21. The ratio boys to girls is 4:3. If there are 18 girls girls on

the trip, how many teachers are there?
Mathematics
1 answer:
Alexandra [31]3 years ago
6 0

Answer:

4

Step-by-step explanation:

Let's say B is the number of boys and T is the number of teachers.

T / (B + 18) = 2/21

B/18 = 4/3

Solve the second equation for B.

B = 24

Plug into the first equation to find T.

T / (24 + 18) = 2/21

T = 4

You might be interested in
Write an explicit formula for the arithmetic sequence whose common difference is -18
drek231 [11]

Let the first term be a(0).  Then the formula for a(n) is a(0)-18(n-1).

Check:  What's the first term?  Let n = 1:  a(1) = a(0)-18(1-1) = a(0) (correct)

What's the second term?    Let -n =2:  a(2) = a(0)-18(2-1) = a(0) - 18

and so on.

7 0
2 years ago
Read 2 more answers
The sum of 3 consecutive odd numbers is 183. What is the third number in this sequence?
natta225 [31]

Answer:

61

Step-by-step explanation:

3x + 6 = 183

3x = 177

x = 59

(x+2) = (59+2) = 61

It is correct on khan academy

3 0
2 years ago
Read 2 more answers
Lucy earned $400 and $550 in interest the last 2 years. Describe the average interest she should earn in each of the next 3 year
Rzqust [24]
So she has 400 and 500 so far.

now if she were to have an average of 2300 for the next 5 years, that means some years she made more, some she made less, but in the 5 years run, she made 2300 * 5 or 11500 total.

Neverminding the lows and highs, if we bundle up the 11500 bucks and divide by 5, that'd 2300, which is what's called the average, the average amount doesn't take into account that some numbers are higher than others, it kinda just flattens them out.

so in total she would have made 11500 in each account.

so in the account with 400, she needs 11100 more, how much will it be 1100 for the next three years on average?  11100/3  or 3700.

so if she earns 3700 each year, for the next 3 years in the account with 400 already, she'd have 11500 bucks in 5 years with an average of 2300.

now let's look at the 500 account, she needs 11000 more, how much will it be for 11000 for the next three years on average?  11000/3 or about 3666.67.

so if she earns 3666.67 each year, for the next 3 years, she'd have 11500 bucks in 5 yeas with an average of 2300.
4 0
3 years ago
If a factor of a quadratic function is (25+4), then the matching zero is:
cluponka [151]

Step-by-step explanation:

I uploaded the answer to the file hosting:

7 0
2 years ago
What is the sign of -201 + 189−201+189minus, 201, plus, 189?
svlad2 [7]
-201+189=-12-201=-213+189=-24 . S the sign would be negative(-).
8 0
3 years ago
Other questions:
  • A stack of 9 bricks weighs 27 kilograms. how many grams does each brick weigh?
    5·2 answers
  • Steve climbed up Mt. McKinney to an elevation of 5000 feet above sea level. His brother, Sam, dove 150 feet below the sea level
    12·1 answer
  • The graph below plots a function f(x): graph of line segment going through ordered pairs 0, 100 and 3, 220 If x represents time,
    7·2 answers
  • The sum of two numbers is 103. The larger number is 5 less than twice the smaller number. Find both numbers.
    8·1 answer
  • What is the width of a rectangular room with an are 90 square feet and a length of 9 feet
    5·2 answers
  • Is this relation a function? EXPLAIN WHY OR WHY NOT
    9·1 answer
  • Evaluate the expression for s=9<br> 72/s
    9·1 answer
  • Which of the following is a correct equation for the line passing through the point (-3,2)and having slope m=2/3
    5·1 answer
  • The senior classes at High School A and High School B planned separate trips to Yellowstone National Park. The senior class at H
    12·1 answer
  • Point C is the center of the circle.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!