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3 years ago

Geometry!!Find the area of the rhombus!!

Mathematics

1 answer:

mars1129 [50]3 years ago

7 0

The area of a rhombus is half of the product of the lengths of the diagonals.

area = (7.5 yd + 7.5 yd)(13 yd + 13 yd)/2

area = (15 yd)(26 yd)/2

area = 390 yd^2/2

area = 195 yd^2

Answer: 195

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Rafael earns $10.50 per hour helping his neighbor with their chores. He is curious how much money he will earn depending on the

dalvyx [7]

Okay so he earns 10:50 per hour so there 24 hours in a day you can times 10:50 and 24 hope this helps

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2 years ago

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A passenger car will go 465 miles on 15.5 gallons of gasoline in city driving. What is the rate in miles per gallon? 10 pts

iren2701 [21]

Answer:

30 miles per gallon

Step-by-step explanation:

465 / 15.5 = 30

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2 years ago

Answer to this problem <br> 2³×(15-9)+7

Crazy boy [7]

Answer:

The answer is 55.

Step-by-step explanation:

hope this helps

2³×(15-9)+7

=8(15-9)+7

=120-72+7

=48+7

=55

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2 years ago

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Let y′′′−9y′′+20y′=0. find all values of r such that y=erx satisfies the differential equation. if there is more than one correc

DerKrebs [107]

we are given

differential equation as

$y'''-9y''+20y'=0$

we are given

$y=e^{rx}$

Firstly, we will find y' , y'' and y'''

those are first , second and third derivative

First derivative is

$y'=re^{rx}$

Second derivative is

$y''=r*re^{rx}$

$y''=r^2e^{rx}$

Third derivative is

$y'''=r^2*re^{rx}$

$y'''=r^3e^{rx}$

now, we can plug these values into differential equation

and we get

$r^3 e^{rx}-9r^2 e^{rx}+20re^{rx}=0$

now, we can factor out common terms

$e^{rx}(r^3 -9r^2 +20r)=0$

we can move that term on right side

$(r^3 -9r^2 +20r)=0$

now, we can factor out

$r(r^2 -9r +20)=0$

$r(r-5)(r-4)=0$

now, we can set them equal

$r=0$

$r-5=0$

$r=5$

$r-4=0$

$r=4$

so, we will get

$r=0,4,5$ ...............Answer

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3 years ago

Denis let go of a penny at the top of a well and the penny fell straight down to the bottom of the well the top of the well was

Furkat [3]

Answer:

The distance between the top of the well and the bottom of the well was 12 1/2

Step-by-step explanation:

(a.k.a B) i did it and got it right :)

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2 years ago