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2 years ago

A rectangle is 21 meters long and 11 meters wide. what is the perimeter of this rectangle?

Mathematics

1 answer:

Kipish [7]2 years ago

4 0

Step-by-step explanation:

the perimeter is simply the distance you would have to walk when going around the whole object once.

so, you would go a length, a width, another length and another width, until you are finally arriving back at the starting point.

so, the perimeter of a rectangle is

2×length + 2×width = 2×21 × 2×11 = 42 + 22 = 64 m

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What is the ratio of 52253 to 18366

svp [43]

Answer:

i think the answer would be 52253 : 18366

Step-by-step explanation:

5 0

3 years ago

Solve the system of equations using matrices. x+7y=02x−8y=22 Question 7 (Mandatory) (1 point) Step 1. Find the coefficient matri

Alex Ar [27]

Answer:

x=7

y =-1

Step-by-step explanation:

Given is a system of equations in x and y as

$x+7y=0\\2x-8y =22$

This can be written in matrix form as

Ax = B

$\left[\begin{array}{ccc}1&7\\2&-8\end{array}\right]\left[\begin{array}{ccc}x\\y\end{array}\right] =\left[\begin{array}{ccc}0\\22\end{array}\right]$

Let us find inverse of A

$|A| = -8-14 =-22$

$A^{-1} =\frac{-1}{22} *\left[\begin{array}{ccc}-8&-7\\-2&1\end{array}\right]$

X= A ^(-1) B

x=7, y =-1

4 0

4 years ago

A pizza delivery guy name now takes 5 hours to deliver 54 pizzas, he earns $0.40 per pizza he delivers. How much money dose now

Hitman42 [59]

I'm 5 hours the pizza guy will earn 21.60

3 0

4 years ago

Sandra wants to rent a car to take a trip and has a budget of $90. There is a fixed rental fee of $30 and a daily fee of $10. Wr

lana [24]

Answer:

2 and a quarter days

Step-by-step explanation:

30+10=40

90-80=10

10 is a quarter of 40

6 0

3 years ago

Please help me anyone i need this in 10 minutes

Radda [10]

Given:

The rate of interest on three accounts are 7%, 8%, 9%.

She has twice as much money invested at 8% as she does in 7%.

She has three times as much at 9% as she has at 7%.

Total interest for the year is $150.

To find:

Amount invested on each rate.

Solution:

Let x be the amount invested at 7%. Then,

The amount invested at 8% = 2x

The amount invested at 9% = 3x

Total interest for the year is $150.

$x\times \dfrac{7}{100}+2x\times \dfrac{8}{100}+3x\times \dfrac{9}{100}=150$

Multiply both sides by 100.

$7x+16x+27x=15000$

$50x=15000$

Divide both sides by 50.

$x=\dfrac{15000}{50}$

$x=300$

The amount invested at 7% is $300$ .

The amount invested at 8% is

$2(300)=600$

The amount invested at 9% is

$3(300)=900$

Therefore, the stockbroker invested $300 at 7%, $600 at 8%, and $900 at 9%.

6 0

3 years ago