Each of the four shaded rectangles has an area of 21 cm square and a perimeter of 20cm what is the perimeter of the square formed in middle

Answers

Answer 1

Answer:

16cm

Step-by-step explanation:

Given

[tex]Area = 21cm^2[/tex]

[tex]Perimeter = 20cm[/tex]

[tex]n=4[/tex] --- rectangles

Required

The perimeter of square in the middle

The area of a rectangle is:

[tex]Area = L * W[/tex]

So, we have:

[tex]L * W =21[/tex]

The perimeter is:

[tex]P = 2*(L + W)[/tex]

So, we have:

[tex]2*(L + W) = 20[/tex]

Divide by 2

[tex]L + W = 10[/tex]

Make L the subject

[tex]L = 10 - W[/tex]

Substitute [tex]L = 10 - W[/tex] in [tex]L * W =21[/tex]

[tex](10 - W) * W = 21[/tex]

Open bracket

[tex]10W - W^2 = 21[/tex]

Rewrite as:

[tex]W^2 -10W +21 = 0[/tex]

Expand

[tex]W^2 -3W - 7W + 21 = 0[/tex]

Factorize

[tex]W(W - 3) - 7(W - 3) = 0[/tex]

Factor out W - 3

[tex](W - 7)(W - 3) = 0[/tex]

Solve for 7

[tex]W = 7\ W = 3[/tex]

We have:

[tex]L = 10 - W[/tex]

This means that:

[tex]W = 7\ W = 3[/tex]

[tex]L = 3,\ L = 7[/tex]

The length (l) of the square is:

[tex]l = |W - L|[/tex] ---- the difference between the dimension of the rectangle

[tex]l = |7 - 3|[/tex]

[tex]l = |4|[/tex]

[tex]l = 4[/tex]

The perimeter is:

[tex]P = 4l[/tex]

[tex]P = 4*4[/tex]

[tex]P =16[/tex]

Each Of The Four Shaded Rectangles Has An Area Of 21 Cm Square And A Perimeter Of 20cm What Is The Perimeter

Related Questions

For the parabola y = (x+14)^2 -4, The value of the y coordinate of the vertex is?

Answers

Answer:

-4

Step-by-step explanation:

y = (x+14)^2 -4

The equation is in vertex form

y = a(x-h)^2 + k  where (h,k) is the vertex

The y coordinate of the vertex is k = -4

Answer:

y - coordinate = - 4

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

y = (x + 14)² - 4 ← is in vertex form

with vertex = (- 14, - 4 )

The y- coordinate of the vertex = - 4

what is 8 to the 4thpower

Answers

8 to the fourth power is:

8² · 8² =

64 · 64 =

4096

4096

8^4 could be written as 8x8x8x8.

Thomas is making fruit punch for a party. The recipe calls for 5/8 gallon of orange juice to make a full pitcher of punch.

How many full pitchers of punch can Thomas make with 2 gallons of orange juice

Answers

Answer:

3 remainder 1

Step-by-step explanation:

We have 2 gallons of orange juice and for each pitcher we need 5/8 of a gallon 1 gallon is = to a whole number so in this case 8/8 but because we have 2 gallons we can put it down at 16/8. 5 goes into 16, 3 times with 1 left over we can mark that as a Reminder

PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER!!

Answers

Answer:

300 yd³

Step-by-step explanation:

Volume = lwh

l = 6

w = 5

h = 10

so, 6×5×10 = 300 yd³

Use the diagram to the right to name the following.

a) A line containing point F.

b) Another name for line k.

c) A plane containing point A.

d) An example of three non- collinear points.

e) The intersection of plane M and line k.

Answers

a) A line containing point F-DF

b) Another name for line k-BC

c) A plane containing point A-M

d) An example of three non- collinear points.-(B,A)

e) The intersection of plane M and line k-C

PLZ HELP ME ASAP PLZZ

Answers

Answer:

helloo thereeee

we do such construction from a making bc arc then from b and c making x just when we need to make

Angle bisector

hope that helps ig :)

PLEASE HELP I GIVE BRAINLIEST!! Find the value of x

Answers

Answer: x = 24

Step-by-step explanation:

There are two triangles here; all angles in a triangle add up to 180, so in the first triangle we have two angles.

We add 94 and 41 together, and this gives us 135.

Now, we find the third angle of this triangle and the angle of the inner triangle by doing 180 - 135.

This gives us 45, and now we can calculate for x using the same method we used above.

111 + 45 = 156

180 - 156 = 24

Thus, x is equal to 24 degrees.

find the radius of a circle for which an arc 6 cm long subtends an angle of 1/3 radians at the center?
plz some one can help to solve the question??​

Answers

Step-by-step explanation:

Eueydhhdgdgdbdbddbdbhd

Answer:

Hello,

[tex]R=\dfrac{18}{\pi}\ (cm)[/tex]

Step-by-step explanation:

[tex]Formula: \ L=\theta*R\\[/tex]

[tex]R=\dfrac{6}{\dfrac{\pi}{3} } =\dfrac{6*3}{\pi} =\dfrac{18}{\pi}\ (cm)[/tex]

Look at this sphere:
If the radius is doubled, then which of the following statements about its surface area will be true?

Answers

In the equation for surface area the radius is squared ( r^2)

If the radius is doubled, the radius would be 2^2 more which equals 4

The surface area would be 4 times the old surface area.

5x-2x = 11+14
find the the variable that makes the equation true.

Answers

Answer:

x=25/3

Step-by-step explanation:

I put it into photo math

plzzzz heeeeeeellllllllppppppppp again...

Answers

ANS=40

hope this help you

bye have a great day :)

180-55=25
the interior angle of triangle is 180
so 180-115-25= 40
the answer is 40
give me brainliest if you can thank u!:)

Help anyone can help me do the question,I will mark brainlest.​

Answers

Step-by-step explanation:

h) p^2+b^2=h^2

5^2+x^2=8^2

25+x^2=64

x^2=64-25

x^2=39

x=√39

x=6.244998

We know that

p² + b² = h²

Part a

5² + x² = 8²

x² = 64 - 25

x = √39

Part B

4² + 6² = x²

16+36 = x²

√52 = x

√2×2×13 = x

x = 2√13

Must click thanks and mark brainliest

I needed help on this

Answers

Answer:

Step-by-step explanation:

Let Freda's sum = x

Donnie has 3/4 x

He spends 63 dollars. His sum is now

3/4x - 63

Now the equation looks like this

6(3/4x - 63) = x            Remove the brackets

6*3/4 x - 378 =x

6 * 3/4 = 4 1/2

4 1/2 x - 378 = x           Add 378 to both sides

4 1/2 x = x + 378          Subtract x from both sides

3.5 x = 378                  Divide by 3.5

x = 378 /3.5

x = 108

Since x = 108, that's how much Freda had. (She spent nothing).

The curve y=(k-6)x^2-8x+k cuts the x-axis at two points and has a minimum point. Find the range of values of k.

Answers

Answer:

Hello,

answer:  -2 < k < 8

Step-by-step explanation:

As there are 2 roots: Δ>0

As there is a mininum, k-6 <0 ==> k<6,

minimum :y'=0 ==> (k-6)*2x-8=0 ==> x=4/(k-6)

[tex]\Delta=8^2-4*k*(k-6)\\=64-4k^2+24k\\=-4(k^2-6k+9)+36+64\\=100-4(k-3)^2\\=4(8-k)(k+2)\\\\\Delta\ is\ positive\ for\ -2 < k < 8[/tex]

Help on this pls if you don’t mind

Answers

Answer:

(B) 3

Step-by-step explanation:

Remember that a parallel lines always have the same slope!

Please help explanation if possible

Answers

Answer: ? = 5

Explanation:

y < mx + b

b is y-intercept
mx is slope

To find b I count from (0,0) upward a long the y-axis where the line intercept at point (0,5). So 5 - 0 = 5 therefore, b = 5

Find the circumference and the area of a circle with diameter equal to 8.6 inches. Use 3.14 for pi

Please answer it will mean a lot thanks

Answers

Answer: Circumference of circle = 27.004 inches

              Area of circle = 58.0586 inches²

Step-by-step explanation:

Diameter of circle = 8.6 inches

Pi ([tex]\pi[/tex]) = 3.14

Circumference of circle (With diameter) = [tex]\pi \\[/tex]d ([tex]\pi[/tex]×diameter)

                                                                = 3.14 × 8.6

                                                                = 27.004 inches

Area of circle (With diameter) = [tex]\pi[/tex][tex]d^{2}[/tex]/4

                                                 = 3.14 × 8.6 × 8.6 / 4

                                                 = 3.14 × 73.96 / 4

                                                 = 58.0586 inches²

find the matrices of ​

Answers

[tex]\huge{\sf \left[{x-2y\atop 6x-2z}\:\:\:{4y-3\atop 2y-z}\right]=\left[{-3\atop 4}\:\:\:{5\atop 3}\right]}[/tex]

Creating equations

[tex]\\ \sf\longmapsto x-2y=-3\dots(1)[/tex]

[tex]\\ \sf\longmapsto 4y-3=5\dots(2)[/tex]

[tex]\\ \sf\longmapsto 6x-2z=4\dots(3)[/tex]

[tex]\\ \sf\longmapsto 2y-z=3\dots(3)[/tex]

From eq(2)

[tex]\\ \sf\longmapsto 4y-3=5[/tex]

[tex]\\ \sf\longmapsto 4y=5+3[/tex]

[tex]\\ \sf\longmapsto 4y=8[/tex]

[tex]\\ \sf\longmapsto y=\dfrac{8}{4}[/tex]

[tex]\\ \bf\longmapsto y=2[/tex]

Put the value in eq(1)

[tex]\\ \sf\longmapsto x-2y=-3[/tex]

[tex]\\ \sf\longmapsto x=-3+2y[/tex]

[tex]\\ \sf\longmapsto x=-3+2(2)[/tex]

[tex]\\ \sf\longmapsto x=-3+4[/tex]

[tex]\\ \bf\longmapsto x=1[/tex]

Put the value in eq(4)

[tex]\\ \sf\longmapsto 2y-z=3[/tex]

[tex]\\ \sf\longmapsto z=2y-3[/tex]

[tex]\\ \sf\longmapsto z=2(2)-3[/tex]

[tex]\\ \sf\longmapsto z=4-3[/tex]

[tex]\\ \bf\longmapsto z=1[/tex]

help me guys it's important​

Answers

Answer:

Does the answer help you?

Answer:

36 cm³

Step-by-step explanation:

Volume of R1 :

length = 5 cm

Width = 2 cm

Height = 2 cm

Volume = 5 * 2 * 2 = 20 cm³

Volume of R2:

length = 4 cm

Width = 2 cm

Height = 2 cm

Volume = 4 * 2 * 2 = 16 cm³

Volume of the figure = 20 + 16 = 36 cm³

A plumber gave an estimate for the renovation of a kitchen. Her hourly rate is $55 per hour and the parts for the renovation will cost $234.
If her total estimate is $509.00, how long does she expect the job to take?
hours

a.6 hours
b.7 hours
c.4 hours
d.5 hours

Answers

Answer:

12 houra

Step-by-step explanation:

404-80=27x

 

324=27x

x=324/27

x=12 hours.

The job is expected to take 5 hours, Option d.

What is unitary method?

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

According to the given problem,

Cost for parts = $234

Total estimate = $509.00

Amount left from total estimate after spending for parts = $( 509 - 234 )

                                                                                             = $275

Hourly rate for renovation = $55

Total hours = [tex]\frac{275}{55}[/tex] hours

                   = 5 hours.

Hence, we can conclude that she with $275, 5 hours of job can be afforded.

Learn more about unitary method here: https://brainly.com/question/19423643

#SPJ2

Store I offers a pair of shoes Karen wants for 25% off their regular price of $12.00. Store J sells the same pair of shoes for $10, before a $2.00 mail-in rebate. Where should Karen purchase her shoes? Explain your reasoning. (Be sure to consider the cost of postage, as well as the time and effort required to mail in the rebate request in your response.)

Store I 12 x 0.25=$3 12-3=9

Store j

Answers

Answer:

This is already solved half-way.

Store I, 25% off:

$12 - 25% = $12 * (1 - 0.25) = $12 * 075 = $9

Store J, $2 off:

$10 - $2 = $8

A pair of shoes cost $9 in store I and $8 in store J.

Karen should purchase her shoes from the store J as it costs $1 less.

In store I :-

The discount:-

[tex]\\ \sf\longmapsto 12\times 25\%[/tex]

[tex]\\ \sf\longmapsto 12\times \dfrac{25}{100}[/tex]

[tex]\\ \sf\longmapsto \$ 3[/tex]

Cost of shoe

[tex]\\ \sf\longmapsto 12-3[/tex]

[tex]\\ \sf\longmapsto \$ 9[/tex]

In store J:-

The Cost of shoe :-

[tex]\\ \sf\longmapsto 10-2[/tex]

[tex]\\ \sf\longmapsto \$ 8[/tex]

Karen should purchase shoes from store J

PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER!!

Answers

Answer:

A. 48mi^3

Step-by-step explanation:

To find the volume of a rectangular prism, you multiply:

length x width x height

pls help asap !!!!!!!

Answers

Answer:

I think that the answer is 1 to1

In a group of 60 numbers, average of
the first 35 numbers is 18, that of next
15 numbers is 10 and that of the
remaining is 30. What is the average
of the entire group of numbers?
a)
16
b)
17
c)
18
d)
19

Answers

Answer:

c. 18

Step-by-step explanation:

First, you would find the total sum of the 60 numbers. The average is always the sum of the numbers divided by the number of numbers.

35*18=630

15*10=150

Now we do not know how many numbers the last group has. However, we can find it out doing 60-35-15 to see how many numbers are left. There would be 10 numbers left

10*30=300

630+150+300=1080

1080/60=18

Hence, the answer is C(18)

Picture Shown!

Find the image of the given point
under the given translation.
P(-5,7) T(x, y) = (x + 5, y - 4)
P' = ([?], [?])
Enter the number that belongs in
the green box.

Answers

Answer:

0'=(0,3)

Step-by-step explanation:

P'=(-5+5,7-5)=(0,3)

the ratio of the temperature of room S to the temperature of room T is 2:3 and the ratio of the temperature of room T to the temperature of room U is 2:3 . Find the ratio of the temperature of room S to the temperature of room U​

Answers

Step-by-step explanation:

s:t=2:3

t:u=2:3

s:u=?

s/u=2/3

Alex runs every 9 days and swims every 12 days. If he ran and swam today, how many days until he does both activities on the same day again?

Answers

Answer:

36 days

Step-by-step explanation:

The answer is the lcm of (9,12)=36 days

Alex runs in every 9 daysAlex swims in every 12 days

We have to find LCM of 9 and 12

2 | 9,12

2 | 9,6

3 | 9,3

3 | 3,1

LCM=2×2×3×3=4×9=36

Today is 36 th day

Determine the intercepts of the line.

Y-intercept: (_,_)
X-Intercept: (_,_)

Answers

Y-intercept:(0,-45)
X-intercept:(-10,0)

The hypotenuse of a right angled triangle is 8 cm more than its shortest side. The third side is 1 cm shorter than the hypotenuse. Find the three sides of ths is triangle.​

Answers

Answer:

hypotenuse = 13

shortest side = 5

third side = 12

Step-by-step explanation:

Given sides a, b, and c, with c representing the hypotenuse of a right triangle, we can say that

a²+b² = c² using the Pythagorean Theorem.

We are given that the hypotenuse (c) = 8 cm more than the shortest side. Representing the shortest side as a, we can say that c= 8 + a. Then, the third side, which we can represent as b, is 1cm shorter than the hypotenuse, so c-1 = b

c= 8+a

c-1 = b

a²+b² = c²

One thing we can do is to solve for everything in terms of c and solve the third equation from there

c= 8+a

subtract 8 from both sides

c-8 = a

a²+b² = c²

(c-8)²+b² =c²

b = c-1

(c-8)² + (c-1)² = c²

expand

c²-16c + 64 + c² - 2c + 1 = c²

2c² - 18c + 65 = c²

subtract c² from both sides to make this an equation that we can more easily solve

c² - 18c + 65 = 0

To factor, we can find two numbers that add to (-18) and multiply to 65. Two numbers that work at 13 and 5, so we have

c²-13c-5c + 65 = 0

c(c-13) -5(c-13) = 0

(c-5)(c-13) = 0

Therefore, the hypotenuse, or c, is 5 or 13. Because a=c-8, if c=5, a would be negative 3. This is not possible, so c cannot be 5. Therefore, c=13, a=c-8=5, and b=c-1= 12

find the least number which is exactly divisible by 15 , 20, 25
explain step by step​

Answers

Answer:

ans is 300

Step-by-step explanation:

you need to take LCM of 15,20,25 and their LCM Will be 300

I'M NOT PRETTY SURE ABOUT IT. ...

Answer:

300

Step-by-step explanation:

5/15,20,25

3,4,5

5*4*3*5

300

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