The distance between the cities Chicago and Toronto is 540 miles. A motorcycle's speed is 48 mph. For a car, it takes 2.25 hours less to cover the same distance than for the motorcycle. How long does it take them to meet, if they start moving towards each other simultaneously?

The answer is in hours.

PLEASE HELP ME

Answer:

83.5 %

Step-by-step explanation:

The mean is 38 and the standard deviation is 2

38 -2 is 36

36 is one standard deviation below the mean.

43 - 38 is 5

5/2 is 2 1/2 times the standard deviation above the mean

-1< z< 2.5

P ( Z<2.5 )−P (Z<−1 )

P ( Z<−1)=1−P ( Z<1 )

P ( Z<2.5 )-1+P ( Z<1 )

Using the standard normal table

0.9938 - 1 +0.8413

0.8351

83.51%

Rounding to the nearest tenth

83.5%

Yep the answer's 83.5%

godspeed in your adventures in cheating >:)

When a = 1, the equation becomes x² - 6x = -13.

To rewrite the equation 8x² - 48x = -104 with the coefficient of x² as 1,

you can divide the entire equation by 8,

which is the coefficient of x²:

(8x² - 48x) / 8 = (-104) / 8

Now, simplify:

x² - 6x = -13

So, when a = 1, the equation becomes x² - 6x = -13.

for such more question on coefficient

https://brainly.com/question/30845099

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Answer:

D

Step-by-step explanation:

The new one would have a long gap between the Q3 and the maximum of the box and whisker plot, therefore it should create a positive skew.

Answer:

D

Step-by-step explanation:

It will be positively skewed (skewed right), because that means that the longer segment would be on the right side of the median.

140 is a major outlier and a lot larger than the more central numbers. However, it's only 1 number, so the median (location of the "box") would remain similar or the same. The end on the right, however, would move far to the right, extending the "line" on that side.

Answer:

Step-by-step explanation:

The ration of weight of nickel, zinc, and copper in an alloy is 4:1:2

The weight of alloy can be written as

4x + x + 2x = 35 Kg

7 x = 35 Kg

X = 35 Kg/7

X = 5kg

The weight of nickel the alloy = 4 x 5 = 20 Kg

The weight of zinc in the alloy= 1 x 5 = 5kg

The weight of copper in the alloy = 2 x 5 = 10 kg

Answer:

Let X be the amount of each metal needed to make 35 Kg of this alloy.

We know that an alloy is composed of nickel, zinc and copper in a proportion

4:1:2. Therefore, we have:

[tex]4X+1X+2X = 35[/tex]

[tex]7X = 35[/tex]

[tex]X=\frac{35}{7}[/tex]

[tex]X=5[/tex] Kg

Therefore, there are [tex]5 \times 4 =20[/tex] kg of nickel, [tex]1 \times 5 =5[/tex] kg of zinc, and [tex]2 \times 5 = 10[/tex] kg of copper needed to make 35 kg of this alloy

Answer:

1st number = 18

2nd number = -5

Step-by-step explanation:

Let x be first number and y be the 2nd number.

We have been given that first number plus twice a second number is 8. We can represent this information as:

[tex]x+2y=8...(1)[/tex]

We are also given that twice the first number plus the second totals 31. We can represent this information as:

[tex]2x+y=31...(2)[/tex]

Now let us solve our system of equations using substitution method.

From equation (1) we will get,

[tex]x=8-2y[/tex]

Substituting [tex]x=8-2y[/tex] in equation (2) we will get,

[tex]2(8-2y)+y=31[/tex]

[tex]16-4y+y=31[/tex]

[tex]-4y+y=31-16[/tex]  

[tex]-3y=15[/tex]  

[tex]y=\frac{15}{-3}[/tex]

[tex]y=-5[/tex]

Therefore, the second number is -5.

Now let us substitute y=-5 in equation (1).

[tex]x+(2*-5)=8[/tex]

[tex]x-10=8[/tex]

[tex]x=8+10[/tex]

[tex]x=18[/tex]

Therefore, the first number is 18.

The numbers are x = 18 and y = -5.

The question involves a system of linear equations and requires solving for two unknown numbers. Using variables to represent these numbers, the system can be written as:

First equation: x + 2y = 8,

Second equation: 2x + y = 31.

To solve this system, follow these steps:

Multiply the first equation by 2, obtaining the equation 2x + 4y = 16.

Subtract the second equation from this result to eliminate x, leading to 3y = -15.

Divide by 3 to find y = -5.

Substitute y = -5 into any original equation to solve for x.
Using the first equation: x + 2(-5) = 8, therefore x = 18.

The solution to the system is x = 18 and y = -5.

Answer:

20 Riyals you receive if you exchange 5 dollars .

Step-by-step explanation:

As given

The money used in Saudi Arabia is the Riyal.

The exchange rate is 4 Riyals to 1 dollar.

i.e

4 Riyals = 1 dollar.

Now calculate for 5 dollars.

5 × 4 Riyals = 5 × 1 dollars

20  Riyals = 5 dollars

Therefore 20 Riyals you receive if you exchange 5 dollars .

Answer:F=−20d+1500

Step-by-step explanation:he amount of filling used to make each dumpling is constant, so we're dealing with a linear relationship.

We could write the desired formula in slope-intercept form: F=\greenD md+\maroonD bF=md+b. In this form, \greenD mm gives us the slope of the graph of the function and \maroonD bb gives us the yy-intercept. Our goal is to find the values of \greenD mm and \maroonD bb and substitute them into this formula.

Hint #22 / 3

We know that each dumpling Dominik makes decreases the filling remaining by 2020 grams, so the slope \greenD mm is \greenD{-20}−20, and our function looks like F=\greenD{-20}d+\maroonD bF=−20d+b.

We also know that Dominik has 15001500 grams of filling initially, so the yy-intercept \maroonD{b}b is \maroonD{1500}1500.

Hint #33 / 3

Since \greenD{m}=\greenD{-20}m=−20 and \maroonD{b}=\maroonD{1500}b=1500, the desired formula is:

The function's formula for the grams F of filling remaining as a function of d, the number of dumplings Dominik makes, is given by:F(d) = 1500 - 20d

To derive this formula, we start by considering the total amount of filling Dominik has, which is 1500 grams. Each dumpling uses 20 grams of filling. Therefore, if Dominik makes d dumplings, he will have used 20d grams of filling. To find the remaining filling, we subtract the amount used from the total amount initially available:

[tex]\[ F(d) = \text{Total filling} - (\text{Filling per dumpling} \times \text{Number of dumplings}) \] \[ F(d) = 1500 - (20 \times d) \] \[ F(d) = 1500 - 20d \][/tex]

This function gives us the amount of filling, in grams, that remains after Dominik has made d dumplings.

Answer:

16 inches

Step-by-step explanation:

2 1/4 = 9/4 inches

Number of pieces = 36 / 9/4

= 36 + 4/9

= 16 inches

Answer:

D. 16

Step-by-step explanation:

I divided 36 from 2.25.

Answer:

Step-by-step explanation:

1. If you work these out in detail, they are tedious, but not difficult. Fortunately, you can take advantage of certain clues to simplify the work.

___

2. You know the -x as an argument of the function will flip the curve left-to-right, so only C and D are potential choices. One way to resolve the ambiguity is to see what the function value is for x=0. You find they are the same:

... f(0) = root(3)(0 -1) = g(0) = root(3)(-0-1) = root(3)(-1)

Only graph C has the two curves crossing at x=0.

___

f(x) = root(3)(x -1) is a shift to the right of the parent function root(3)(x).

Replacing x by -x reflects that function across the y-axis, so what was a shift to the right now becomes a shift to the left, as seen in graph C.

Answer:

4th degree

Step-by-step explanation:

We can use a technique called finite differences.

In column 1  put the differences  between the y values  (y2-y1)

Keep adding columns with the differences until they become constant.

Column 2 is column1 differences  (-2- -30) etc

Column3 is column 2 differences

Column 4 is column3 differences

The differences in column4 are the same, so we can stop

This will be a 4th degree polynomial

x    y          column 1               column 2      column 3        column 4

-2  30        

-1   0                 -30                    

0   -2               -2                           28

1      0               2                           4               -24

2     30           30                          28               24              48

3    160           130                        100               72               48

4      510        350                       220               120             48

Answer:

4th degree ...........

Answer:

Total attendance for the game at stadium last year was 612500.

Step-by-step explanation:

Each year the soccer team, Peterson United, plays 25 games at their stadium.

The owner of Peterson United claimed that last year the mean attendance per game was = 24500

Since mean of any set of data = [tex]\frac{sum of data}{Total number of data}[/tex]

When we apply this rule in this question formula becomes as

24500 = [tex]\frac{x}{25}[/tex]

x = 25 × 24500

x = 612500

Answer:

x = 53 degrees

Step-by-step explanation:

Alternate exterior angles are equal if  two parallel lines are cut by a transversal.

 If  m and n are parallel, then

3x-28 = 2x+25

Subtract 2x from each side.

3x-28-2x = 2x+25-2x

x-28 =25

Add 28 to each side.

x-28+28 = 25+28

x = 53

Answer:

Yes they are proportional!

The factors of 28 that we can use in these fractions are 4 and 7.  To find if these are proportional, just simplify 8/28.  To do so divide the numerator (top) and the denominator (bottom) both by 4...

8/28 / 4 = 4/7

Now that you have both with the same denominator, you can evaluate if 3/7 and 4/7 are proportional.  In this case they are.

Hope this helps! :)

[tex]\bf ~\hspace{10em}\textit{function transformations} \\\\\\ \begin{array}{llll} f(x)= A( Bx+ C)^2+ D \\\\ f(x)= A\sqrt{ Bx+ C}+ D \\\\ f(x)= A(\mathbb{R})^{ Bx+ C}+ D \end{array}\qquad \qquad \begin{array}{llll} f(x)=\cfrac{1}{A(Bx+C)}+D \\\\\\ f(x)= A sin\left( B x+ C \right)+ D \end{array} \\\\[-0.35em] ~\dotfill\\\\ \bullet \textit{ stretches or shrinks horizontally by } A\cdot B\\\\ \bullet \textit{ flips it upside-down if } A\textit{ is negative}\\ ~~~~~~\textit{reflection over the x-axis}[/tex]

[tex]\bf \bullet \textit{ flips it sideways if } B\textit{ is negative}\\ ~~~~~~\textit{reflection over the y-axis} \\\\ \bullet \textit{ horizontal shift by }\frac{ C}{ B}\\ ~~~~~~if\ \frac{ C}{ B}\textit{ is negative, to the right}\\\\ ~~~~~~if\ \frac{ C}{ B}\textit{ is positive, to the left}\\\\ \bullet \textit{ vertical shift by } D\\ ~~~~~~if\ D\textit{ is negative, downwards}\\\\ ~~~~~~if\ D\textit{ is positive, upwards}\\\\ \bullet \textit{ period of }\frac{2\pi }{ B}[/tex]

with that template in mind, let's check

C = -3, three units to the right

D = -2, two units down.

[tex]\bf f(x)=2^x~\hspace{10em}\stackrel{\stackrel{C=-3\qquad D=-2}{\cfrac{}{}}}{g(x)=2^{x-3}-2}[/tex]

Answer:

g(x) = 2^(x - 3) - 2.

Step-by-step explanation:

Translating 2^x  3 units to the right .  This is done by changing it to 2^(x - 3). Then 2 units down is given by 2^(x -3) - 2.

Answer is 2^(x - 3) - 2.

Answer:

29.  sec w csc w - sec^2 w

31.  - tan ^2 k (sin k +1)

Step-by-step explanation:

29.  (cot w -1)/ (1- sin^2 w)

We know that cot w = cos w/ sin w

and 1 - sin^2 w = cos ^2 w

Replace these identities into the expression

(cos w/ sin w -1)

-----------------------

cos ^ 2 w    

Get a common denominator on top of sin w

(cos w/ sin w -sin w/sin w)

-----------------------

cos ^ 2 w    

(cos w - sinw)/ sin w

-----------------------

cos ^ 2 w

(cos w - sinw)

-----------------------

cos ^ 2 w  sin w

Split into 2 terms

cos w                            sin w      

-----------------------   -   ---------------------------------

cos ^ 2 w  sin w             cos ^2 w  sin w

Cancel cos w in the first term and sin w in the second term

1                                       1    

-----------------------   -   ---------------------------------

cos  w  sin w             cos ^2 w  

We know that 1/cos = sec  and 1/ sin = csc

sec w csc w - sec^2 w

31.    sin k/ (1 - csc k)

We know that csc k is 1/ sin k

sin k

---------------

1 - 1/ sin k

Get a common denominator for the bottom

sin k

---------------

sin k/ sin k - 1/ sin k

sin k

---------------

(sin k-1)/ sin k

Multiply by sin k/sin k

sin k * sin k

---------------

(sin k-1)/ sin k  * sin k

sin k * sin k

---------------

(sin k-1)

sin^2 k

---------------

(sin k-1)

Multiply by (sin k +1)/ (sin k +1)  so we can get rid of the denominator

sin^2 k  (sin k +1)

-------------------------

(sin k-1) (sin k +1)

Foiling out the denominator, we get (sin^2 k-1)

sin^2 k  (sin k +1)

-------------------------

(sin^2 k-1)

Factoring out a -1 from the denominator

sin^2 k  (sin k +1)

-------------------------

-1 (1 - sin^2 k)

1 - sin ^2 k = cos ^ k

sin^2 k  (sin k +1)

-------------------------

-1 (cos ^2 k)

sin ^2k/ cos ^2 k = tan ^2 k

- tan ^2 k (sin k +1)

Look at the picture.

Use the Pythagorean theorem:

[tex]a^2+b^2=d^2[/tex]

A) a = 1, b = 1

[tex]d^2=1^2+1^2\\\\d^2=1+1\\\\d^2=2\to d=\sqrt2\ \text{it's not rational number}[/tex]

B) a = 4, b = 5

[tex]d^2=4^2+5^2\\\\d^2=16+25\\\\d^2=41\to d=\sqrt{41}\ \text{it's not rational number}[/tex]

C) a = 3, b = 4

[tex]d^2=3^2+4^2\\\\d^2=9+16\\\\d^2=25\to d=\sqrt{25}\to d=5\ \boxed{:)}[/tex]

D) a = 1, b = 2

[tex]d^2=1^2+2^2\\\\d^2=1+4\\\\d^2=5\to d=\sqrt5\ \text{it's not rational number}}[/tex]

Options A, B, and D do not yield a perfect square, while option C does, with a=3 and b=4 resulting in a rational diagonal length of 5.

The diagonal of a rectangle can be found using the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b). Mathematically, this is represented as [tex]c^2 = a^2 + b^2,[/tex] where a and b are the sides of the rectangle and c is the diagonal.

Looking at the given options:

Therefore, the possible values of a and b which will make the diagonal of the rectangle a rational number are given in option C: a=3 and b=4.

The error is in Step-4.

A negative exponent does NOT mean that the number turns negative. A negative exponent means the number is in the denominator.

(4)⁻⁴ means (1/4⁴) .  That's (1/256) .  All positive numbers.

Answer:

65° and 115°

Step-by-step explanation:

let one angle be x then the other is x + 50

The sum of 2 supplementary angles = 180°, hence

x + x + 50 = 180

2x + 50 = 180 ( subtract 50 from both sides )

2x = 130 ( divide both sides by 2 )

x = 65

Thus the 2 angles are x = 65° and x + 50 = 65 + 50 = 115°

Final answer:

Hannah initially has 8/9 of a pound of birdseed, and after using 2/3 of a pound, she has 2/9 of a pound remaining, which is calculated by finding a common denominator and subtracting the second fraction from the first.

Explanation:

Hannah initially has 8/9 of a pound of birdseed. After filling her bird feeders with 2/3 of a pound of birdseed, we need to subtract the amount she used from what she started with to find out how much birdseed she has left. The calculation we'll use is:

(initial amount) - (amount used) = (amount remaining)

In fractional form, this becomes:

8/9 - 2/3

To subtract these fractions, we need a common denominator. The smallest common denominator for 9 and 3 is 9. We can convert 2/3 to 6/9 by multiplying the numerator and the denominator by 3. After this step, the subtraction is straightforward:

8/9 - 6/9 = 2/9

Hence, Hannah has 2/9 of a pound of birdseed remaining.

Answer:

79.38 miles per hour

Step-by-step explanation:

average speed =  miles covered / hours

= 515.97 / 6.5

=  79.38

Answer:    79.38 miles per hour

Step-by-step explanation:

Given : Distance covered by rally car race course = 515.97 miles

Time taken to complete the course by winning car = 6.5 hours

The average speed of the winning car = ( Distance covered by rally car race course) ÷  (Time taken to complete the course by winning car)

= (515.97)÷ (6.5) miles per hour

= 79.38 miles per hour

Hence, the average speed of the winning car =  79.38 miles per hour.

Answer: 838860

=========================================

Plug in x = 0 to find y = f(x)

f(x) = 4^(2x+1)

f(0) = 4^(2*0+1)

f(0) = 4

The point (0,4) is on the function curve

Plug in x = 5 and compute

f(x) = 4^(2x+1)

f(5) = 4^(2*5+1)

f(5) = 4194304

The point (5, 4194304) is on the function curve

Once you have these two points, you use the slope formula to compute the average rate of change

m = (y2-y1)/(x2-x1)

m = (4194304 - 4)/(5-0)

m = 838860

The slope of the line through the two points found earlier is m = 838860, so this is the average rate of change on f(x) for the interval from x = 0 to x = 5.

Answer:

23% error since 70 more people attended then Marcus counted

Step-by-step explanation:

To calculate the percent error:

Marcus counted 230 and 300 actually came.

1. 230-300=-70 but the absolute value is 70

2. 70/300=0.23

3. 0.23(100)=23%

Marcus' estimated had a 23% error.

Answer:

[tex] The\ number\ of\ 8 \frac{1}{4}\ inches\ of\ section\ of\ rope\ be\ 6. [/tex]

Step-by-step explanation:

As given

Mario is setting up a new tent during a camping trip.

The tent came with 7 feet of rope.

As 1 foot = 12 inches

Now convert 7 feet into inches.

7 feet = 7 × 12 inches

         = 84 inches

As given

The instructions were to use 34.5 inches of the rope to tie a tarp on top of the tent.

Than

Rope left after tie a tarp on top of the tent = 84 - 34.5

                                                                      = 49.5 inches

As given

[tex]The\ remaining\ rope\ should\ be\ cut\ into\ 8 \frac{1}{4}\ inch\ sections\ to\ tie\ the\ tent\ to\ stakes\ in\ the\ ground.[/tex]

i.e

[tex]The\ remaining\ rope\ should\ be\ cut\ into\ \frac{33}{4}\ inch\ sections\ to\ tie\ the\ tent\ to\ stakes\ in\ the\ ground.[/tex]

[tex]Let\ us\ assume\ the\ number\ of\ \frac{33}{4}\ inches\ section\ of\ rope\ be\ x.[/tex]

Than the  equation becomes

[tex]\frac{33\times x}{4} = 49.5[/tex]

[tex]x = \frac{49.5\times 4}{33}[/tex]

[tex]x = \frac{198}{33}[/tex]

x = 6

Answer:

6

Step-by-step explanation:

Converting 7 ft to inches:

[tex]7*12=84[/tex] inches

We set up the equation as:

[tex]34.5+8.25x=84[/tex]

Now solving for [tex]x[/tex] would give us the number of 8.25 inch sections:

[tex]8.25x=84-34.5\\8.25x=49.5\\x=\frac{49.5}{8.25}=6[/tex]

Hence, Mario can cut 6 (8.25 inch) sections from the rope

Answer:

90

Step-by-step explanation:

Answer:

80 mg

Step-by-step explanation:

By proportion the daily allowance is 200 * 100/250

= 200 * 10/25

=  80 mg

Answer: [tex]\bold{x=\dfrac{c}{a-b},\qquad x=7}[/tex]

Step-by-step explanation:

Move all of the x's to one side and everything else on the other.

ax = bx + c

ax - bx = c      subtracted bx from both sides

x(a - b) = c       factored out the like term of "x" on left side

[tex]x=\dfrac{c}{a-b}[/tex]          divided both sides by (a- b)

2x = x + 7  → a = 2, b = 1, c = 7

                    [tex]x=\dfrac{7}{2-1}[/tex]

                     x = 7

Check:

2x = x + 7

-x    -x      

x =       7