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2 years ago

URGENT!!!!!!!!!!!

Mathematics

2 answers:

Bingel [31]2 years ago

4 0

Answer:

D. 21

Step-by-step explanation:

replace 21 for r, 4(21)=84

Hope this helps! If you found my answer helpful, please consider marking me brainliest. Thank you!

Kazeer [188]2 years ago

3 0

Answer:

D. 21

Hope this helps!

Step-by-step explanation:

Because in order to find r, you need to divide both sides by 4 to get r = 21.

So that means there will be 21 rhinestones on each backpack.

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3x+2y+4+9y=<br> Plz answer

fomenos

<span>3x+2y+4+9y=

Combine like terms:
2y+9y=11y

I believe the answer is 3x+11y+4

(That is unless you know the numbers that y & x equals)</span>

5 0

3 years ago

Ben and Ella are filling goodie bags for a party. Each goodie bag needs an eraser, a bubble wand, and a few candy bar bites. Ben

maxonik [38]

Answer:

Ben

Step-by-step explanation:

25 goodies = 20 minutes

27 goodies = 24 minutes

Let's use ratio, divide both of them by their minute

25/20 = 20/20

27/24 = 24/24

1.25 goodies = 1 minute

1.12 goodies = 1 minute

1.25 is bigger than 1.12.

7 0

3 years ago

Slope Intercept Form And Equations From Graphs

r-ruslan [8.4K]

Answer:

1. Choice B

2. Choice C

3. X=-2

4. Choice A

5. y = 5/2 x + 5

Step-by-step explanation:

the slope is down 3 over 2 m =-3/2

point slope form

y-y1= m (x-x1)

y-y1 = -3/2 (x-x1)

Choice B

2. (-3,-1) (1/2,2)

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

m=(2--1)/(1/2--3) = (2+1)/(1/2+3) = 3/(3.5) = multiply top and bottom by 2

m = 6/7

point slope form

y-y1 = m(x-x1)

y--1 = 6/7 (x--3)

y+1 =6/7 (x+3)

multiply by 7

7y+7 = 6(x+3)

7y+7 = 6x+18

subtract 7y from each side

7 = 6x-7y+18

subtract 18 from each side

-11=6x-7y

Choice C

3. x=-2

This is a vertical line, the value of x never changes

4. (-1,2) (1,-4)

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

= (-4-2)/(1--1) = -6/(1+1) = -6/2 = -3

point slope form

y-y1 = m(x-x1)

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

y-2 = -3(x+1)

y-2 = -3x-3

add 2 to each side

y = -3x-1

Choice A

5. (-2,0) (0,5)

the y intercept is 5

slope is change in y over change in x

slope =(y2-y1)/(x2-x1) = (0-5)/(-2-0) = -5/-2 = 5/2

slope intercept form

y= mx+b

y = 5/2 x + 5

7 0

3 years ago

1 + 4x + 6 - x = y What are m and b in the linear equation, using the common meanings of m and b?

chubhunter [2.5K]

Answer:

Step-by-step explanation:

it 28 by adding 6 +1 is 7 and times it by 4

4 0

3 years ago

Read 2 more answers

A triangle with vertices at A(0, 0), B(0, 4), and C(6, 0) is dilated to yield a triangle with vertices at A′(0, 0), B′(0, 10), a

sineoko [7]

ANSWER

The scale factor is
$2.5$

EXPLANATION

The given triangle has vertices,

$A(0,0),B(0,4),\:and\:C(6, 0)$ .

The vertices of the image triangle is,

$A'(0,0),B'(0,10),\:and\:C'(15, 0)$ .

The scale factor is given by

$k = \frac{image \: length}{object \: length}$

So we can use any of the corresponding sides to determine the scale factor,

$k = \frac{|A'B'|}{ |AB|}$

$k = \frac{ |10 - 0| }{ |4 - 0|}$

$k = \frac{ |10| }{ |4 |} = \frac{10}{4} = 2.5$

Or

$k = \frac{|A'C'|}{ |AC|}$

$k = \frac{ |15 - 0| }{ |6 - 0|}$

$k = \frac{ |15| }{ |6|} = \frac{15}{6} = 2.5$

Or

$k=\frac{|B'C'|}{|BC|}$

$k = \frac{\sqrt{(15 - 0)^2+(0-10)^2 }}{\sqrt{(6 - 0)^2+(0-4)^2}}$

$k = \frac{ 5\sqrt{13}}{2\sqrt{13}} = \frac{5}{2} = 2.5$

The correct answer is C

3 0

2 years ago