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3 years ago

12

The following are the winning times, in seconds, for the Kentucky Derby from 1997 to 2016. Select the boxplot that

2 answers:

iragen [17]3 years ago

4 0

Answer:

The answer is A

Step-by-step explanation:

Just did the problem.

Varvara68 [4.7K]3 years ago

3 0

Answer:

The answer A is correct.

The first plot.

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Select the symbol = (equal to) or ≠ (not equal to) to make the expression true. <br> {0} ? { }

Sever21 [200]

Answer:

=

Step-by-step explanation:

{0}={} because 0 means that there is nothing and in null set too, there is no elements.

6 0

2 years ago

First answer get the best marks

Sonja [21]

Answer:

Choice C

Step-by-step explanation:

$-3.55g \le -28.4$

Divide both sides by -3.55; remember that by dividing both sides of an inequality by a negative sign, you need to change the direction of the inequality sign.

$\dfrac{-3.55g}{-3.55} \ge \dfrac{-28.4}{-3.55}$

$g \ge 8$

Answer: Choice C

6 0

4 years ago

Read 2 more answers

Consider the quadratic function f(x) = -x^2 + 1x + 12. Determine the following: (enter all numerical answers as integers, fracti

vovikov84 [41]

Answer and Explanation:

Given : The quadratic function $f(x)=-x^2+x+12$

To find : Determine the following ?

Solution :

The x -intercept are where f(x)=0,

So, $-x^2+x+12=0$

Applying middle term split,

$-x^2+4x-3x+12=0$

$-x(x-4)-3(x-4)=0$

$(x-4)(-x-3)=0$

$x=4,-3$

The x-intercepts are (4,0) and (-3,0).

The smallest x-intercept is x=-3

The largest x-intercept is x=4

The y -intercept are where x=0,

So, $f(0)=-(0)^2+0+12$

$f(0)=12$

The y-intercept is y=12.

The quadratic function is in the form, $y=ax^2+bx+c$

On comparing, a=-1 , b=1 and c=1 2

The vertex of the graph is denote by (h,k) and the formula to find the vertex is

For h, The x-coordinate of the vertex is given by,

$h=-\frac{b}{2a}$

$h=-\frac{1}{2(-1)}$

$h=\frac{1}{2}$

For k, The y-coordinate of the vertex is given by,

$k=f(h)$

$k=-h^2+h+12$

$k=-(\frac{1}{2})^2+\frac{1}{2}+12$

$k=-\frac{1}{4}+\frac{1}{2}+12$

$k=\frac{-1+2+48}{4}$

$k=\frac{49}{4}$

The vertex of the function is $(h,k)=(\frac{1}{2},\frac{49}{4})$

The x-coordinate of the vertex i.e. $x=-\frac{b}{2a}$ is the axis of symmetry,

So, $x=-\frac{b}{2a}=\frac{1}{2}$ (solved above)

The axis of symmetry is $x=\frac{1}{2}$ .

4 0

4 years ago

Solution A is an $80\%$ acid solution. Solution B is a $30\%$ acid solution. (a) Find the amount of Solution A (in mL) that must

Irina-Kira [14]

Answer:

(a) $2000\text{ ml}$ (b) $40\text{ ml and }60\text{ ml}$ (c)NO

Step-by-step explanation:

GIVEN: Solution A is an $\$80\%$ acid solution. Solution B is a $\$30\%$ acid solution.

TO FIND: (a) Find the amount of Solution A (in mL) that must be added to $500 \text{ml}$ of Solution B in order to produce a $70\%$ acid solution. (b) Find the amount of Solution A and Solution B (in mL) that can be combined in order to form a $100 \text{ml}$ solution that is $50\%$ acid. (c) Does there exist a combination of Solution A and Solution B that is $90\%$ acid.

SOLUTION:

(a)

Let total amount of solution A added be $x$

Total amount of mixture $=500+x\text{ ml}$

As resulting solution is $70\%$ acid solution.

Amount of acid in final solution is sum of acid in both solutions

$\frac{70}{100}(500+x)=\frac{80}{100}x+\frac{30}{100}\times500$

$35000+70x=80x+15000$

$x=2000\text{ ml}$

(b)

Let amount of Solution A be $x\text{ ml}$

Amount of solution B $=100-x\text{ ml}$

As resulting solution is $50\%$ acidic solution

Amount of acid in final solution is sum of acid in both solutions

$\frac{50}{100}\times100=\frac{80}{100}x+\frac{30}{100}(100-x)$

$5000=80x+3000-30x$

$50x=2000$

$x=40\text{ ml}$

Amount of solution B $=100-40=60\text{ ml}$

(c)

No as concentration of final solution can not be greater than one with higher concentration.

7 0

3 years ago

Omar uses 1/6 of his tickets to ride the water slide. How many tickets does he use he has 24 in total?

Sphinxa [80]

Omar used 4 tickets.
Have a brainy day.

$\frac{24}{1}$ × $\frac{1}{6}$ = $\frac{24}{6}$ = 4

8 0

3 years ago