which of the following expressions is equal to -x^2-81

Answer:

y= 5x+20

Step-by-step explanation:

Slope intercept form is

y = mx+b where m is the slope and b is the y intercept

The slope is 5 and a point on the line is (-4,0)

Substituting this information into the equation, we can solve for b

0 = 5(-4) +b

0 = -20+b

Add 20 to each side

0+20 = -20+20+b

20 = b

y = 5x+20

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Let's find the y - intercept (c) of the line, by Plugging the value of x and y from coordinates of the given point (-4 , 0) and slope (m) = 5 :

now, let's plug the value of slope (m) and y - intercept (c) in general equation of line to find the equation of line will have been asked for.

Answer:

m = -21 / 7 = -3 / 1 = -3

Step-by-step explanation:

i think im not sure but i hope it helps and good luck!

Answer:

No, it is an irrational number.

Step-by-step explanation:

I hope this helped! **please mark me brainliest :)

Answer:

week = 7 days

7 × 2l = 14 liters in week

months = 30 days

30 x 2l = 60 liters in month

Answer:

She will drink 14 litres in a week.

If the month has 28 days,

56 litres

If the month has 30 days,

60 litres

If the month has 31 days,

62 litres

Step-by-step explanation:

Pls mark as brainliest

Answer:

a)   t-4 = 3 (i - 1/4h) =  h = 3i - 3 3/4h  

= t = -0.75

= h = 4  

b) 3.30am = 1 inch.

Step-by-step explanation:

a)   formula for point slope form = y - y1 = m(x-x1)

a) t-4 = 3(i - 1/4h)  converts to  t-4   = 3i - 3/4h  = t = 3i- 3 3/4

x = - 0.75 y = 4  =     t= -0.75 and h = 4

b) 12.15am = 4 inches

1.15am = 3.25 inches

2.15am = 2.5 inches

3.15am = 1.75inches

3.30 = 1 inches

3.15 + 15mins = 1 inch

Answer:

Step-by-step explanation:

Answer:

The train appears to go the same distance each minute

9mins

The cost for each person appears to be the same

Step-by-step explanation:

So for the first qu you basically want to find  the distance the train travels each minute, so for

3mins : 9km

therefore

1min : 3km

basically divide 9 by 3

then the train travels 27km, how long does it take?

if 3km = 1min

then 27/3 = 9

so it takes the train 9 minutes

Then for the second qu you'll do the same thing

2ppl : $16

so one person : 16/2

so 1 person costs $8

so for 8 ppl you multiply 8 by 10

8ppl : $80

hope this helps:))))

Answer:

-45=-2x+15

-45-15=-2x

-60=2x

x=30

The correct categorization for each variable:

(a) Type of shirt on the clearance rack:

(b) End-of-year stock classification:

(c) Amount of coffee in a cup:

Categorization is the process of classifying or grouping items, data, or concepts into specific categories or classes based on their shared characteristics or attributes

This variable shows different types of shirts (long sleeves with a collar, long sleeves without a collar, short sleeves with a collar, or short sleeves without a collar).

The nominal level of measurement is the basic level where data is placed into separate groups without any particular order or ranking.

Read more about categorization  here:

https://brainly.com/question/29977525

#SPJ3

See full text below

For each of the variables described below, indicate whether it is a quantitative or a categorical (qualitative) variable. Also, indicate the level of measurement for the variable: nominal, ordinal, interval, or ratio. Make sure your responses are the most specific possible.

Variable

Type of variable

Level of measurement

(a) Type of shirt on the clearance rack (long-sleeved with collar, long-sleeved without collar, short-sleeved with collar, or short-sleeved without collar)

Quantitative

Nominal

Ordinal

Categorical

Interval

Ratio

(b) End-of-year stock classification (high yield, medium yield, or low yield)

Quantitative

Nominal

Ordinal

Categorical

Interval

Ratio

(c) Amount (in fluid ounces) of coffee in a cup dispensed by a vending machine

Quantitative

Nominal

Ordinal

Categorical

Interval

Ratio

Answer:

easyy

Step-by-step explanation:

It's B

Answer:

Step-by-step explanation:

Since f and f⁻¹ are inverse functions, the domain of the one equals to the range of the other:

Answer:

{3;-2;4}

Step-by-step explanation:

all the details are in the attachment, note, the suggested way of solution is not the only one.

Step-by-step explanation:

Line segment = EG

point on a line segment = F

EG = 100

EF = 4x - 20

FG = 2x + 30

a/q, EF + FG = EG

the equation is

4x - 20 + 2x + 30 = 100

now solution for x is

→ 4x - 20 + 2x + 30 = 100

→ 6x + 10 = 100

→ 6x = 100 - 10 = 90

→ x = 90/6 = 15

therefore, value of x is 15.

and according to given information

EF = 4x - 20 = 4(15) - 20 = 60 - 20 = 40

FG = 2x + 30 = 2(15) + 30 = 30 + 30 = 60

hope this answer helps you dear..take care and may u have a great day ahead!

Answer:

$557.52

Step-by-step explanation:

1. Find the marked up price.

125% = 1.25

$892.03 x 1.25 = $1,115.04

2. Find the discounted price.

50% = 0.5

$1,115.04 x 0.5 = $557.52

Answer:

1003.54

Step-by-step explanation:

Hope this helps! ;)

Answer:

Snake who just put on a pair of socks.

Step-by-step explanation:

It looks like you're just missing two letters, p and s.

I hope this helped :)

Answer:

the value of y=2

here ,

(2x-1,3y-2)=(x+2,2y)

then,

3y-2=2y{corresponding elements}

3y-2y=2

or, y=2

hence the value of y=2

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Value of the given terms are :

Solution is in attachment ~

Answer:

The average number is 30.437

Step-by-step explanation:

Given :-

To Find :-

Answer :-

The number of cubes will be say ' n ' ,

Hence the number of cubes is 144.

Answer:

( - 6, 1.5 )

Step-by-step explanation:

( x1, y1 ) = ( - 2, - 1 )

Here,

x1 = - 2

y1 = - 1

( x2, y2 ) = ( - 10, 4 )

Here,

x2 = - 10

y2 = 4

Formula : -

Mid - point = ( x1 + x2 ) / 2, ( y1 + y2 ) / 2

Mid - point = ( - 2 - 10 ) / 2, ( - 1 + 4 ) / 2

                  = - 12 / 2, 3 / 2

Mid - point = ( - 6, 1.5 )

Answer:

76

Step-by-step explanation:

Answer:

67 days

Step-by-step explanation:

700 pages. first day read 40 pages so 700-40=660 pages. then she read everyday 10 pages that means 660/10=66+firstday=67 is the answer.

Answer:

kk

l will help

we will all learn

together

Answer:

wow that's one lucky worm

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Calculate the slope m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 3, 4 ) and (x₂, y₂ ) = (2, - 1 )

m = [tex]\frac{-1-4}{2-(-3)}[/tex] = [tex]\frac{-5}{2+3}[/tex] = [tex]\frac{-5}{5}[/tex] = - 1 → A

Answer:

If two angles and the included side of one triangle are equal to the corresponding angles and side of another triangle, the triangles are congruent.

Step-by-step explanation:

Answer:

1 and 4

Step-by-step explanation:

All the other options have corresponding x-values

Answer:

The first and fourth options

Step-by-step explanation:

If it's a function no input and have more than one output.

Answer:

C) Multiplication and Addition

C) 16 7/20

Step-by-step explanation:

The perimeter can be found by the formula:

Let P = perimeter,

P = 2 x (Length + Width)

P = 2 x (6 4/5 + 1 3/8)

P = 2 x (8 7/40)

P = 16 7/20 meters  

We used multiplication and addition. Hope this helps!