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3 years ago

9

using the slope formula find the slope of the line through the points (0,0) and (3,9) use pencil and paper explain how you can u

se mental math to find the slope of the line

2 answers:

Sedaia [141]3 years ago

8 0

Answer:

The answer is 3

Step-by-step explanation:

maxonik [38]3 years ago

7 0

Answer:

9/3

Step-by-step explanation:

you can't subtract from zero or you can't subtract a number from zero.

You might be interested in

A girl ran from her home to a store at the rate of 6 mph, and she walked back home at the rate of 4 mph. if it took 15 minutes f

viva [34]

Home is 0.6 miles away from the store

How to solve such time related questions?

The key concept for solving such questions is the relationship between speed, distance and time.

The relationship between them is Distance = Speed x Time

Given:-

Total time taken by girl to complete the trip = 15 minutes = $\frac{1}{4}$ hours

Speed while riding going = 6 miles per hour

Speed while coming back = 4 miles per hour

Total time taken by girl =

Time taken while going + Time taken while coming back - (1)

Let x be distance from home to store

$\frac{x}{6}$ = Time taken while going

$\frac{x}{4}$ = Time taken while coming back

Substituting in (1) we get

$\frac{1}{4} = \frac{x}{6} + \frac{x}{4}$

$\frac{1}{4} = \frac{2x + 3x}{12}$

$\frac{1}{4} = \frac{5x}{12}$

$x= \frac{12}{20}$

x = 0.6 miles

Thus home is 0.6 miles away from the store

Learn more about time related here :

brainly.com/question/12759408

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6 0

2 years ago

Eight times a number is the same as 30 less than 5 times the number. Find the number?

Charra [1.4K]

Answer:

x = -10

Step-by-step explanation:

We just have to translate the problem correctly

>8 times a number is the same

this tells me that

$8x = ...$

>as 30 less than 5 times the number.

$... = 5x - 30$

Now set them equal to eachother

$8x = 5x - 30$

Now isolate the variable x

$8x - 5x = 5x - 5x - 30\\3x = -30\\x = \frac{-30}{3} = -10$

6 0

3 years ago

Read 2 more answers

A random sample of 64 observations produced a mean value of 84 and standard deviation of 5.5. The 90% confidence interval for th

ASHA 777 [7]

Answer: The 90% confidence interval for the population mean μ is between 82.85 and 85.15,

Step-by-step explanation:

When population standard deviation is not given ,The confidence interval population proportion is given by ( $\mu$ ):-

$\overline{x}\pm t^*\dfrac{s}{\sqrt{n}}$

, where n= Sample size.

s= Sample standard deviation

$\overline{x}$ = sample mean

t* = Critical t-value (Two-tailed)

As per given , we have

$\overline{x}=84$

n= 64

Degree of freedom : df = n-1=63

s= 5.5

Significance level : $\alpha=1-0.90=0.1$

Two-tailed T-value for df = 63 and $\alpha=1-0.90=0.1$ would be

$t_{\alpha/2,df}=t_{0.05,63}=1.669$ (By t-distribution table)

i.e. t*= 1.669

The 90% confidence interval for the population mean μ would be

$84\pm (1.669)\dfrac{5.5}{\sqrt{64}}$

$=84\pm (1.669)\dfrac{5.5}{8}$

$\approx84\pm 1.15$

$=(84-1.15,\ 84+1.15)=(82.85,\ 85.15)$

∴ The 90% confidence interval for the population mean μ is between 82.85 and 85.15,

6 0

3 years ago

Can someone pls help me with the middle one?:( plss

VashaNatasha [74]

Answer:

71

Step-by-step explanation:

It appears the most in the expression.

7 0

2 years ago

Read 2 more answers

What is the correct way to write 1.002 in expanded and word form?

olasank [31]

The digits after the decimal separator are, in order, tenths, hundreths and thousandths. So, your number is composed by:

1 unit
0 tenths
0 hundreths
2 thousandths

So, you would call this name "one and two thousandths"

3 0

3 years ago