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4 years ago

I need a little help on 21

Mathematics

2 answers:

lidiya [134]4 years ago

7 0

Answer:

560 seconds.

Step-by-step explanation:

liberstina [14]4 years ago

7 0

Answer:

560 seconds

Step-by-step explanation:

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Ghella [55]

A is the right answer

7 0

3 years ago

What is the length to XY? Enter only the number as an integer or decimal.

patriot [66]

Answer:

11.25

Step-by-step explanation:

it is a dialation of 2.25:

12 x 2.25 = 27

and

8 x 2.25 = 18

so...

5 x 2.25 =

11.25

6 0

3 years ago

hello! this isn't a solving question, but I need some help here! Does anyone know any good websites to study for coordinate plan

siniylev [52]

Answer:

<h2>I know about a website for fractions to decimals, It's call "fractions to decimals calculator soup."</h2>

Step-by-step explanation:

5 0

3 years ago

Use the point-slope formula to write an equation of the line that passes through (-5,3) and

trapecia [35]

Answer:

The equation in point slope form is $y-6=\frac{1}{3}(x-4)$

The equation in slope intercept form is $y=\frac{1}{3}x-\frac{14}{3}$

Step-by-step explanation:

step 1

Find the slope m

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have

$(-5,3),(4,6)$

Substitute the values

$m=\frac{6-3}{4+5}$

$m=\frac{3}{9}$

simplify

$m=\frac{1}{3}$

step 2

Find the equation of the line in point slope form

$y-y1=m(x-x1)$

we have

$m=\frac{1}{3}$

$(4,6)$

substitute

$y-6=\frac{1}{3}(x-4)$ ---> equation in point slope form

step 3

Find the equation of the line in slope intercept form

$y=mx+b$

$y-6=\frac{1}{3}(x-4)$ ----> convert to slope intercept form

$y-6=\frac{1}{3}x-\frac{4}{3}$

$y=\frac{1}{3}x-\frac{4}{3}+6$

$y=\frac{1}{3}x-\frac{14}{3}$

5 0

3 years ago

F(x) = -0.5x2, if f(x) = -112.5, what is the value of 'x'?<br> ?

sleet_krkn [62]

Answer:

x = ± 15

Step-by-step explanation:

Given f(x) = - 0.5x² and f(x) = - 112.5 , then equate right sides

- 0.5x² = - 112.5 ( divide both sides by - 0.5 )

x² = 225 ( take square root of both sides )

x = ± $\sqrt{225}$ = ± 15

7 0

2 years ago