Calculati aria unui patrat care are perimetrul de 7,2 cm

Answers

Answer 1

Answer:

$A=l^2=\left((P)/(4)\right)^2=\left((7,2)/(4)\right)^2=1,8^2=3.24\;cm^2.$

Green eyes.

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What would a model be for the math word problem Sammy has 50 pieces of gum. He wants to give 1/2 of the pieces to his brother and 3/4 of the pieces to his sister.

Answers

Answer: X = 1/2(y)

Z= 3/4(x)

But x= 1/2(y)

So z = 3/4 * 1/2(y)

Z = 3/8(y)

Total= 1/2(y) +3/8(y) + 1/8(y)

Step-by-step explanation:

two men start from 2 places 600km apart and travel towards each other, the first travelling 5km/h faster than the other. they meet after 8 hours. what is the speed of the fastest man? I know that this relates to the following formula; speed = distance/time, but don't understand how to resolve correctly

Answers

If they meet after 8 hours, then the sum of their average speeds is 600/8=75 km per hour. If one is 5 km per hour faster than the other, then if we set the speed of the slower man to x, we have:

2x+5=75

So:

2x=70

x=30

The fastest man is 5 km per hour faster than the slower, so he travels 35 km per hour.

Joe will go to the swimming pool on 20 different days this month. • a one-day pass to the pool is $2.25. • a monthly pass to the pool is $30.00. how much money will joe save by buying a monthly pass

Answers

Joe will save 20 dollars buying a monthly pass

Concorde could travel 1 mile every 3 seconds.
How many miles per hour (mph) is that?

Answers

Concorde could travel distance of 1 mile every 3 seconds which is equals to 1200 miles per hour.

What is distance?

" Distance is defined as the path travelled between two points."

Conversion used

1miunte = 60 seconds

1 hour = 60minutes

= 60 × 60 seconds

= 3600 seconds

According to the question,

Distance travelled in 3 seconds = 1mile

Distance travelled 1 second = $(1)/(3)$ mile

Distance travelled in 1hour = $(3600)/(3)$

= 1200 miles per hour (mph)

Hence, Concorde could travel distance of 1 mile every 3 seconds which is equals to 1200 miles per hour.

Learn more about distance here

brainly.com/question/15172156

#SPJ3

total seconds =60*60=3600
dividing by 3 we get, 1200

so its 1200 mph

Find the non-extraneous solutions of the square root of the quantity x plus 9 minus 5 equals quantity x plus 4

Answers

Answer:

x=8 and x=9

Step-by-step explanation:

The given equation is:

$√(x+9)-5=x+4$

On solving this equation, we get

⇒ $√(x+9)=x+9$

Squaring on both sides, we get

⇒ $x+9=x^2+81+18x$

⇒ $x^2+18x-x-9+81=0$

⇒ $x^2+17x+72=0$

⇒ $x^2+8x+9x+72=0$

⇒ $(x+8)(x+9)=0$

Thus, the solution of the above equations are x= 8 and x=9.

I"m guessing you mean
$√(x+9) -5=x+4$
add 5 to both sides
$√(x+9)=x+9$
square both sides
x+9=x²+18x+81
minus x+9 both sides
0=x²+17x+72
factor
what 2 numbres multiply to get 72 and add to get 17?
8 and 9
0=(x+8)(x+9)
set to zer

0=x+8
x=-8

x+9=0
x=-9

test each

$√(-8+9) -5=-8+4$
$√(1) -5=-4$
1-5=-4
-4=-4
true

$√(-9+9) -5=-9+4$
$√(0) -5=-5$
-5=-5
true

the solutions are x=-9 and -8

X+3y=3
2x-4y=6

solve the equations

Answers

Subtract the second equation from double the first equation:

2x+6y-2x-(-4y)=0

10y=0

Therefore, y=0. Substituting this into the first equation, we see that:

x+3(0)=3

x=3

Therefore, x=3. The solution to this system is x=3, y=0, or (3, 0).

so divide the second equation by 2
x-2y=3
the first equation is
x+3y=3
subsitute
3=3 so therefor
x-2y=x+3y
subtract x from both sides
-2y=3y

add 2y to both sides
0=5y
ofviously y=0 so subsitute
x-2y=3
x-(2)0=3
x-0=3
x=3

x=3
y=0

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