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
zloy xaker [14]
3 years ago
15

8. Number of boys in a class is twice the number of girls. 20% of the girls are brunettes and of the rest – half are blondes: Ma

ry, Clara, Gina and Trisha. How many boys study in this class?
Mathematics
1 answer:
slega [8]3 years ago
8 0

Answer:

<em>20 boys </em>

Step-by-step explanation:

b = 2g

100% - 20% = 80%

80% ÷ 2 = 40% = 0.4

0.4g = 4 ⇒ g = 4 ÷ 0.4 = 10

b = 2 × 10 = 20

There are 10girls and <em>20 boys</em> study in the class.

You might be interested in
Study the equation.<br> x² + 6x = - 4
Zinaida [17]

Answer:

x = -3+√5,  -3-√5 (exact roots)

or  x = -0.76, -5.24   to the nearest hundredth.

Step-by-step explanation:

x² + 6x = - 4

Completing the square:

(x + 3)^2 - 9 = -4

(x + 3)^2 = 5

x + 3 = +/-√5

x = - 3 + √5, - 3 - √5

5 0
3 years ago
The fish population in a local stream is decreasing at a rate of 2.5% per year. The original population was 45,000. Write an exp
Julli [10]

Answer:

y=45000(1-0.03)^x

Step-by-step explanation:

1) the exponential decay formula is

y=c(1-r)^x

where c= starting amount

r=rate of change

x=time

so

y=45000(1-0.03)^x

y=45000-1350x

4 0
3 years ago
4x + y &gt; -6 order pair solution
slamgirl [31]
I guess it could be anything? because it says 4 times x + y is GREATER THAN -6
6 0
3 years ago
Last year Andrea's annual salary was A dollars and she was paid biweekly. This year she received a
Cloud [144]

Biweekly salary last year algebraically will be S = (27)A.  Semimonthly salary this year algebraically will be S = ( A + R )6.

<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that Last year, Andrea's annual salary was A dollar and she was paid biweekly. This year she received a raise of R dollars per year. She is now paid semimonthly.

Biweekly salary last year algebraically will be:-

S = (27)A.

Semimonthly salary this year algebraically will be:-

S = ( A + R )6.

Therefore, the biweekly salary last year algebraically will be S = (27)A.  Semimonthly salary this year algebraically will be S = ( A + R )6.

To know more about expression follow

brainly.com/question/723406

#SPJ1

7 0
1 year ago
An employee has been stealing funds from the company for years. Which of the following control methods would have most likely un
nasty-shy [4]

Answer:

Complete a bank reconciliation

Step-by-step explanation:

A bank reconciliation is the process where the financial records of the bank is compared with the firm's financial record. If an employee has been stealing funds from the company, there would be a discrepancy between the figures provided by the record.

In a bid to know the reason for the discrepancy, the theft would be detected

8 0
2 years ago
Other questions:
  • If a 25 in. by 32 in. picture has a wooden frame "x" in. wide surrounding it, which equation can be used to find the total area
    8·2 answers
  • 5 FRIENDS GO OUT TO LUNCH AND ORDER 5 PIZZAS, THE FRIENDS DIVIDED THE PIZZAS EVENLY.FIND HOW MUCH PIZZA EACH FRIEND GOT AS A DEC
    13·2 answers
  • Find the values of a and b so that the solution of the linear system is (5,2)
    8·2 answers
  • Diego's mother is twice as old as he is she is also as old as the sum of the ages of diego and both of his younger twin brothers
    9·1 answer
  • Divide using long division (x^2-13x-48)÷(x+3)
    13·1 answer
  • For the functions f(x) = 2x + 2 and g(x) = 7x + 1, which composition produces the greatest output? a) Both compositions produce
    10·2 answers
  • on monday, 205 students went on a trip to the zoo. all 4 buses were filled and 5 students had to travel in cars how many student
    9·2 answers
  • Please answerrrrrrrrr :)
    6·2 answers
  • Help! this is due in 2hrs.!!!!!!!!! HELP ASAP!
    12·2 answers
  • Determine whether the value of each power is positive or negative.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!