Mathematics, 25.09.2019 02:00 armando87

Stuck 30 points
10. a a square and a rectangle have equal areas. the rectangle is 64 cm by 81 cm. what is the perimeter of the square?
a. 72 cm
b. 144 cm
c. 288 cm
d. 5,184 cm

Answers: 2

Show answers

Answers

Answer from: mayasiegel5234

288 cm.

Step-by-step explanation:

Area of the rectangle = 64 * 81 = 5184 cm^2 which is also the area of the square.

The side of the square = √5184 = 72 cm.

So the perimeter of the square = 72 * 4

= 288 cm.

Answer from: nellymbh4227

The answer is c.288 since 64*81=5184 and the square root of 5184 is 72 and 72*4=288

Answer from: Quest

first anwser choice.

step-by-step explanation:

the greater/less or equal to symbol (> or < with the line at the bottom) is a closed/filled in circle.

when multiplying or dividing by a negative on both sides you have to flip the inequality sign. this rule only applies to multiplying or dividing by a negative number in inequality equations. this rule is really important.

-5c + 2 _< _27

subtract from both sides by 2

-5c _< _ 27

divide both sides by -5

c _< _ 5.4

flip the inequality sign

c _> _5.4

the only possible answer that would match the simplified inequality is the first answer choice

5c+2< 27 i really do not understand this.

Answer from: Quest

the speed is $135$ miles per hour > is false

step-by-step explanation:

we know that

a relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

in a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

the graph shown in the figure represent a direct variation

the slope of the line represent the speed

$y/x=k$

for the point $(1.5,90)$

substitute the values of x and y

$k=90/1.5=60\ miles/hour$

the linear equation is equal to

$y=60x$

statements

case a) it takes $2$ hours to go $120$ miles

the statement is true

because

substitute

for $x=2$

find the value of y in the linear equation

$y=60(2)=120\ miles$ > is correct

case b) the speed is $135$ miles per hour

the statement is false

because the speed is $60\ miles/hour$

case c) the unit rate for the trip is $60\ miles/hour$

the statement is true

because the speed is equal to the slope of the linear equation

case d) it took $20$ minutes to go the first $20$ miles

the statement is true

because

substitute

for $x=20\ minutes=(1/3)\ hour$

find the value of y in the linear equation

$y=60(1/3)=20\ miles$ > is correct

Another question on Mathematics

Mathematics, 21.06.2019 14:00

Find an equation of the line perpendicular to the graph.

Answers: 3

Answer

Mathematics, 21.06.2019 15:20

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Answers: 3

Answer

Mathematics, 21.06.2019 16:30

A(t)=728(1+0.04)^t how much money did aditya originally invest

Answers: 1

Answer

Mathematics, 21.06.2019 20:00

Given the equation y − 4 = three fourths(x + 8) in point-slope form, identify the equation of the same line in standard form. −three fourthsx + y = 10 3x − 4y = −40 y = three fourthsx + 12 y = three fourthsx + 10

Answers: 1

Answer

You know the right answer?

Stuck 30 points
10. a a square and a rectangle have equal areas. the rectangle is 64 cm by 81...

Questions