What is the length of X

how DO I DELETE THIS ANSWER

Solving for the elapsed time

distance traveled = (speed of first train + speed of second train) * elapsed time

280 miles = (95 mph + 105 mph) * elapsed time

280 miles = 200 mph * elapsed time

elapsed time = 280 miles / 200 mph

elapsed time = 1.4 hours

elapsed time = 1 hour and 24 minutes

It will take 1 hour and 24 minutes for the two trains to be 280 miles apart.

Answer: B

Step-by-step explanation:

Answer:

The system has one solution.

Step-by-step explanation:

To find the number of solutions of the system, we equal both equations for y.

If we have ax = b, in which both a and b are different of 0, we have one solution.

If both a and b are 0, we have infinite solutions.

If a is 0 and b is not, there are no solutions.

y=6/7x-8 and y=7/9x+10/9

So

[tex]\frac{6x}{7} - 8 = \frac{7x}{9} + \frac{10}{9}[/tex]

[tex]\frac{6x}{7} - \frac{7x}{9} = \frac{10}{9} + 8[/tex]

[tex]\frac{54x - 49x}{63} = \frac{10}{9} + \frac{72}{9}[/tex]

[tex]\frac{5x}{63} = \frac{82}{9}[/tex]

[tex]45x = 63*82[/tex]

Both a and b are different of 0, so the system has one solution.

Answer:

Step-by-step explanation:

The equation of line is y = 3x + 9 , where the slope is m = 3

The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept

And y - y₁ = m ( x - x₁ )

y = y-coordinate of second point

y₁ = y-coordinate of point one

m = slope

x = x-coordinate of second point

x₁ = x-coordinate of point one

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

Given data ,

Let the equation of line be represented as A

Now , the value of A is

y = 3x + 9   be equation (1)

The equation is of the form y = mx + b where m is the slope and b is the y-intercept

Substituting the values in the equation , we get

Slope m = 3

The y intercept of the line is ( 0 , 9 )

Now , the equation of line is plotted on the graph below

Hence , the equation of line is y = 3x + 9

To learn more about equation of line click :

https://brainly.com/question/14200719

#SPJ5

Answer:

18

Step-by-step explanation:

Answer:

I DONT KNOW

Step-by-step explanation:

WHATDYA MEAN WHATS 6 x 3

I DONT KNOW

Answer:

the total monthly cost is $742.36

Step-by-step explanation:

The computation of the total monthly cost is shown below:

= Mortgage payment + insurance + taxes + electricity + phone service + fuel + water + repairs

= $347.90 + $17 + $84 + $64.40 + $33.50 + $98.25 + $17.44 + $79.87

= $742.36

Hence, the total monthly cost is $742.36

Answer:

Option A is the answer buddy

Step-by-step explanation:

Answer:

a is the answer boi

Step-by-step explanation:

Answer:

a = 2

b = 1

c = 1

Step-by-step explanation:

The quadratic equation, 2x² + x + 1 = 0, is expressed in the standard form as ax² + bx + c, where a ≠ 0.

Thus,

a = 2

b = 1 (1 * x = x)

c = 1

Answer:

10 students in Kindergarten

Step-by-step explanation:

20% is equal to 1/5

1/5 x 50 = 10 or 50 ÷ 5 = 10

Answer:

10 ig

Step-by-step explanation:

cause

Answer:

C 37.5

Step-by-step explanation:

1 inch is 30 feet. so feet is 30 x [number of inches]. 30 x 1.25 = 37.5

Answer:

384.61

Step-by-step explanation:

ok the 3000 does NOW MATTER  they ask about the norm. so 2500 ÷ 6.50$

=384.61 :)

Answer:

when the doubled the pair of sandals manufactured=3000-2500

=500

the amount spend on manufacturing running shoes=,2500-500

=2000

number of sandals made=500//2.50

(without doubling) =200

number of running shoes =2000/4

=500

Answer: it’s (6,8)

Step-by-step explanation: I took the test

Answer:

the answer is D

Step-by-step explanation:

Answer:

D. 6g

Step-by-step explanation:

Answer:

C. 216

Step-by-step explanation:

6³ = 6 x 6 x 6

6 x 6 = 36

36 x 6 = 180 + 36

180 + 36 = 216

hope this helps

Answer:

4/8 3/6 5/10 2/4 6/12

Step-by-step explanation:

pls give me the crown pls

and i hope this helped you :)

Answer:

5 pennies

7 nickels

19 dimes

$2.3

Step-by-step explanation:

first i like to find 1%

50/100=1%

50/100=0.5

then multiply to find %'s

0.5x10=pennies

0.5x10=5

0.5x38=dimes

0.5x38=19

since there are 2 more nickels than pennies there are 7 nickels since there are 5 pennies

then find each value and add

5x.01+7x.05+19x.10

0.05+0.35+1.9=$2.3

Answer:

Hey! I'll only help with a few..

Step-by-step explanation:

2. 2c(7c+1)

3. The expression is not factorable with rational numbers.

4. 2x^3y^2(4-11 x^2y^4)

Hope this helps!

Have a nice day!♥

Answer:

the answer to that is B hope it helps

Answer:

Step-by-step exlanation:

What you do is $18,000 x 5% which is 900 and then you do 900 x 10 = 9000!

Answer:

D) -2

Step-by-step explanation:

Slope = -3

(1, -9)

y - y1 = m(x - x1)

y + 9 = -3(x - 1)

y + 9 = -3x + 3

y = -3x - 6

y = -3x - 6

0 = -3x - 6

6 = -3x

x = -2

Answer:

74

Step-by-step explanation:

Answer:

its 0.60(36)

Step-by-step explanation:

Answer:

y = -7

Step-by-step explanation:

I wrote how I did

and the steps

Answer: -7

Step-by-step explanation:

Answer:

240 yd²

Step-by-step explanation:

I assume you’re looking for area?

24x8=192

1/2x12x8=48

192+48= 240 yd²

here u go

i hope u got it

Answer:

a) 89.97% of men have arm spans between 66 and 76 ​inches.

b) The z-score for this​ person's arm span is 5.68. 0% of males have an arm span at least as long as this​ person

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Mean of 71.4 inches and a standard deviation of 3.1 inches.

This means that [tex]\mu = 71.4, \sigma = 3.1[/tex]

a. What percentage of men have arm spans between 66 and 76 ​inches?

The proportion is the pvalue of Z when X = 76 subtracted by the pvalue of Z  when X = 66. The percentage is the proportion multiplied by 100.

X = 76

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{76 - 71.4}{3.1}[/tex]

[tex]Z = 1.48[/tex]

[tex]Z = 1.48[/tex] has a pvalue of 0.9306

X = 66

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{66 - 71.4}{3.1}[/tex]

[tex]Z = -1.74[/tex]

[tex]Z = -1.74[/tex] has a pvalue of 0.0409

0.9306 - 0.0409 = 0.8997

0.8997*100% = 89.97%

89.97% of men have arm spans between 66 and 76 ​inches.

b. A particular professional basketball player has an arm span of almost 89 inches. Find the​ z-score for this​ person's arm span. What percentage of males have an arm span at least as long as this​ person?

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{89 - 71.4}{3.1}[/tex]

[tex]Z = 5.68[/tex]

The z-score for this​ person's arm span is 5.68.

Z = 5.68 has a pvalue of 1

1 - 1 = 0

0% of males have an arm span at least as long as this​ person

The percentage of men who have arm spans between 66 and 76 ​inches is 89.97% and the percentage of males who have an arm span at least as long as this​ person is 0%.

Given :

According to survey​ data, the distribution of arm spans for males is approximately Normal with a mean of 71.4 inches and a standard deviation of 3.1 inches.

a) The formula of z-score is given below:

[tex]\rm Z = \dfrac{X-\mu}{\sigma}[/tex]

where [tex]\mu[/tex] is the mean and [tex]\sigma[/tex] is the standard deviation.

When X = 66 the formula of z-score becomes:

[tex]\rm Z = \dfrac{66-71.4}{3.1}[/tex]

Z = -1.74

The p-value regarding the (Z = -1.74) is 0.0409.

When X = 76 the formula of z-score becomes:

[tex]\rm Z = \dfrac{76-71.4}{3.1}[/tex]

Z = 1.48

The p-value regarding the (Z = 1.48) is 0.9306.

Now, the percentage of men who have arm spans between 66 and 76 ​inches is:

= (0.9306 - 0.0409) [tex]\times[/tex] 100 %

= 89.97%

b) Now, at X = 89 the formula of z-score becomes:

[tex]\rm Z = \dfrac{89-71.4}{3.1}[/tex]

Z = 5.68

The p-value regarding the (Z = 5.68) is 1.

So, the percentage of males who have an arm span at least as long as 89 inches ​is:

= (1 - 1) [tex]\times[/tex] 100 %

= 0%

For more information, refer to the link given below:

https://brainly.com/question/13299273

Answer:

y - 7 = 1/2(x - 7)

Step-by-step explanation:

Point slope form is y - y1 = m (x - x1)

So find m = y2 - y1/ x2 - x1, so m = -1 - 7 / -9 - 7, m = -8 / -16 so m = 1/2

Then sub your (7,7) so y - 7 = 1/2(x - 7)