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4 years ago

Help quick !!!!!!!!!!!!!!

Mathematics

2 answers:

ser-zykov [4K]4 years ago

7 0

(7×5)+(7×9)

7×(5+9)=98

(7×5)+(7×9)=35+63=98

vfiekz [6]4 years ago

5 0

Answer: the correct answer is ( 7 * 5 ) + (7 * 9 )

Step-by-step explanation:

7 * ( 5+9) = (7 * __) + ( 7 * __) = ( 7 * 5 ) + (7 * 9 )

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If the car spends 2.5 hours going 35 miles per hour on the trip, how long does it spend going 35 miles per hours

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Write a simplified polynomial expression in standard form to represent the area of the rectangle below.

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lets say length = 2x-4
width = x+5

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3 years ago

A small radio transmitter broadcasts in a 29 mile radius. If you drive along a straight line from a city 32 miles north of the t

hram777 [196]

Answer: He will pick up a signal from the transmitter 29.43 miles of the drive.

Step-by-step explanation:

Since we have given that

Radius = 29 mile

So, equation of circle would be

$x^2+y^2=29^2=841$

There is a straight line from a city 32 miles north i.e. (0,32) to a second city 40 miles east of the transmitter i.e. (40,0)

So, equation of line would be

$y-32=\dfrac{0-32}{40-0}(x-0)\\\\y-32=\dfrac{-32}{40}x\\\\y-32=-0.8x\\\\y+0.8x=32\\\\y=32-0.8x$

So, we will put this value in the equation of circle.

$x^2+(32-0.8x)^2=841\\\\x^2+1024+0.64x^2-51.2x=841\\\\1.64x^2-51.2x=841-1024\\\\1.64x^2-51.2x=-183\\\\1.64x^2-51.2x+183=0$

So, x= 4.12 and x = 27.1

So, y = 28.7, y = 10.32

So, distance between them would be

$\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\\\=\sqrt{(27.1-4.12)^2+(28.7-10.32)^2}\\\\=29.43$

Hence, he will pick up a signal from the transmitter 29.43 miles of the drive.

7 0

3 years ago