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3 years ago

9x+lly=15 determine if liear

Mathematics

1 answer:

Vedmedyk [2.9K]3 years ago

3 0

Answer: Yes, it is.

First you have to subtract X on both sides.

9x-9x+11y=-9x+15

equals

11y=-9x+15 (You cannot combine unlike numbers)

You divide both sides by 11.

11y/11= -9x+15/11

equals

Y= -9/11 X+15/11

Although it doesn't look so, graphing calculators online will show that this answer in linear.

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K+3=-9 answers key please

vlabodo [156]

K+3=-9
k=-12 is the answer

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4 years ago

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Here are the vertices of rectangle FROG: (-2,5),(-2,1),(6,5),(6,1). Find the perimeter of this rectangle. If you get stuck, try

ryzh [129]

Answer:

Part 1) The perimeter of rectangle is equal to 24 units

Part 2) The area of rectangle is equal to 32 square units

Step-by-step explanation:

Part 1) Find the perimeter of rectangle

we know that

The perimeter of rectangle is equal to

$P=2(L+W)$

where

L is the length of rectangle

W is the width of rectangle

we have

$F(-2,5),R(-2,1),O(6,1),G(6,5)$

Plot the figure to better understand the problem

using a graphing tool

see the attached figure

Remember that in a rectangle opposite sides are congruent and the measure of each interior angle is equal to 90 degrees

$FG=RO=L\\RF=OG=W$

the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

step 1

Find the distance FG

$F(-2,5),G(6,5)$

substitute the values

$d=\sqrt{(5-5)^{2}+(6+2)^{2}}$

$d=\sqrt{(0)^{2}+(8)^{2}}$

$FG=8\ units$

step 2

Find the distance RF

$R(-2,1),F(-2,5)$

substitute the values

$d=\sqrt{(5-1)^{2}+(-2+2)^{2}}$

$d=\sqrt{(4)^{2}+(0)^{2}}$

$RF=4\ units$

step 3

Find the perimeter

$P=2(L+W)$

we have

$FG=RO=L=8\ units\\RF=OG=W=4\ units$

substitute

$P=2(8+4)=24\ units$

Part 2) Find the area of rectangle FROG

we know that

The area of rectangle is equal to

$A=LW$

we have

$FG=RO=L=8\ units\\RF=OG=W=4\ units$

substitute

$A=(8)(4)=32\ units^2$

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3 years ago

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slamgirl [31]

no solutions → C

The 2 given lines are parallel and never intersect thus no solution

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A rectangular prism has a height of 8 feet and a volume of 640 feet what is the area of the base of the prism

sp2606 [1]

The volume of a prism = area of the base * height

substitute:
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base area=80 sq ft<span />

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3 years ago

a store has a sale where all shirts are sold at a discount of 20% if the regular price of the shirts is $20, how may shirts coul

Elena-2011 [213]

Answer:

15 shirts.

Step-by-step explanation:

A 20% discount means you still pay 80% of the price.

x represents the number of shirts that can be bought.

(20 x (1-0.2) )x = 240 or (20 x .8)x = 240

16 x = 240

x = 240/16 = 15

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3 years ago

9x+lly=15 determine if liear​

9x+lly=15 determine if liear