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
AlexFokin [52]
3 years ago
14

It's about proportion and stuff but I'm confused on this one can someone please explain?​

Mathematics
1 answer:
horsena [70]3 years ago
5 0

Answer:

the one clue you have is "30,12" on the left. try to understand how they relate to each other. maybe how many times 12 goes into 30. or maybe how many times it goes into 32 with no decimal so what number do you have to add (sometimes work doesnt mean it like that so that might be wrong). but if you want the answers, they are:

35/5/15/30

14/2/6/12

the way i did it was if it was on the bottom (y) i did 2.5 times the number. if on the top (x) i did the number divided by 2.5. 2.5 was the rate of change (is that the word i think it is but if it isnt just blame me im sorry).

Step-by-step explanation:

You might be interested in
The table shows the relationship between r and s, where s is the independent variable. Which equation represents the relationshi
Harrizon [31]

Answer:

i dont know sorry im doing a test and i also eed the answer :/

Step-by-step explanation:

:/

6 0
3 years ago
Read 2 more answers
Find the value(s) of x such that f''(x)=0
Goryan [66]
f(x)=\dfrac x{x^2+2}\implies f'(x)=\dfrac{2-x^2}{(x^2+2)^2}\implies f''(x)=\dfrac{2x^3-12x}{(x^2+2)^3}

The denominator is always positive, so any x for which f''(x)=0 is determined only by the numerator:

2x^3-12x=0\implies f''(x)=0
2x^3-12x=2x(x^2-6)=2x(x-\sqrt6)(x+\sqrt6)=0\implies x=0,\pm\sqrt6
4 0
3 years ago
Read 2 more answers
In the workplace rascial discrimination is a very serious issue. consider a company in which 20% of the employees are African-Am
Ipatiy [6.2K]

Answer:

a) How many African-Americans would you expect to get promotions?

Since we have been asked to follow the binomial distribution, (B (40,0.2)

To calculate the mean of the BPD = n*p

where n is the number of promotions and p = probability

= 40 x 0.2 = 8

You expect 8 promotions.

b)  

The probability that 5 African-Americans = P (X = 5)

P( X = 5 ) = 40 sqr root ( 5 * 0.2^5 * 0.8^35 ) = 0.0854

c) What is the probability that five or fewer African-Americans receive promotions?

P( X <= 5) = P(X=5) + P(X=4) + ... + P(X=1) + P(X=0)

faster way is calculator

binomcdf(40, .2, 5) = 0.1613

Step-by-step explanation:

4 0
3 years ago
A study of air quality in Metro City suggests that tt years from now the level of carbon monoxide, in parts per million, in the
GREYUIT [131]

Answer: I think 5.3

Step-by-step explanation:

I did the a method then checked over it :/

6 0
3 years ago
Using the quadratic formula to solve 4x2 – 3x + 9 = 2x + 1, what are the values of x? StartRoot 1 plus-or-minus StartRoot 159 En
castortr0y [4]

For this case we have that a quadratic equation is of the form:

ax ^ 2 + bx + c = 0

The roots are given by:

x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2 (a)}

We have the following equation:

4x ^ 2-3x + 9 = 2x + 1\\4x ^ 2-3x-2x + 9-1 = 0\\4x ^ 2-5x + 8 = 0

We look for the roots:

x = \frac {- (- 5) \pm \sqrt {(- 5) ^ 2-4 (4) (8)}} {2 (4)}\\x = \frac {5 \pm \sqrt {25-128}} {8}\\x = \frac {5 \pm \sqrt {-103}} {8}

We have to:

i ^ 2 = -1

So:

x = \frac {5 \pm \sqrt {103i ^ 2}} {8}\\x = \frac {5 \pm i \sqrt {103}} {8}

We have two imaginary roots:

x_ {1} = \frac {5 \ + i \sqrt {103}} {8}\\x_ {2} = \frac {5 \ -i \sqrt {103}} {8}

Answer:

x_ {1} = \frac {5 \ + i \sqrt {103}} {8}\\x_ {2} = \frac {5 \ -i \sqrt {103}} {8}

8 0
4 years ago
Read 2 more answers
Other questions:
  • Sally's $8,800 savings is in two accounts. One account earns 2% annual interest and the other earns 6%. Her total interest for t
    7·1 answer
  • 25 points! Please help me!
    15·2 answers
  • What is the best estimate for the product of 289 and 7
    10·2 answers
  • Hannah has a grid of squares that had 12 rows with 15 squares in each row. She colors 5 rows of 8 squares in the middle of the g
    7·2 answers
  • Can I please get help on these questions?
    11·2 answers
  • How many pairs of parallel sides does a trapezoid have?
    11·2 answers
  • What is 35 percent of 80
    12·2 answers
  • What is the slope of the line passing through the points (1,2) and (5,4)
    7·1 answer
  • Can someone help me with this I’m confused?
    11·1 answer
  • If the equation is further simplified, which equation for a parabola does it become? x2 = 4py x2 = 2y2 2p2 y2 = 4px y2 = 4py.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!