All categories

3 years ago

The perimeter of a rectangle is 80 cm. The width is 10 cm more than twice the length. What

Mathematics

1 answer:

sashaice [31]3 years ago

7 0

Answer:

L=10cm , W=30cm

Step-by-step explanation:

First use the given that W=10+2*L

Use P=2W+2L=80, substitute W in the perimeter formula

2(10+2L)+2L=80 and solve for L,

20+4L+2L=80 isolate variable L and combine like terms,

6L=80-20,

L=10, so W=10+2*10=10+20=30

You might be interested in

In the table below, x represents miles traveled and y represents the cost to travel by train.

Fiesta28 [93]

Answer:

4.00

Step-by-step explanation:

Given

x: 2 , 5 , 8 , 12

y: 8.50, 15.25, 22.00. 31.00

Required

Determine the y intercept

First, we calculate the slope:

$m = \frac{y_2- y_1}{x_2 - x_1}$

Where

$(x_1,y_1) = (2,8,50)$

$(x_2,y_2) = (12,31.00)$

$m = \frac{31.00 - 8.50}{12 - 2}$

$m = \frac{22.5}{10}$

$m = 2.25$

Next, we calculate the equation:

$y - y_1 = m(x - x_1)$

Where:

$(x_1,y_1) = (2,8,50)$

$m = 2.25$

The equation becomes:

$y - 8.50 = 2.25(x - 2)$

$y - 8.50 = 2.25x -4.5$

Make y the subject

$y = 2.25x -4.5+8.50$

$y = 2.25x +4$

Take $x =0$ ; to get the y intercept

$y = 2.25*0 +4$

$y = 4$

<em>Hence, the y intercept is 4.00</em>

8 0

3 years ago

Read 2 more answers

What are the roots of a quadratic equation?

borishaifa [10]

Roots is another name for the x-intercepts

8 0

4 years ago

What strategy would use to divide 36 by 6 explain why you chose that strategy

wel

I would pick long division because you regroup and better understand

6 0

3 years ago

Read 2 more answers

Please help with all thank you

AleksAgata [21]

8. 9,000+300+4
9.3,000+50+2
10.1,000+600+40+3

3 0

4 years ago

Read 2 more answers

Drag a description to match each equation.<br><br> PLS HELPP MEE !! I'LL MARK IF RIGHTT!!

DaniilM [7]

Answer:

y = 2x -- Multiplicative: y is 2 times x.

y = x + 2 -- Additive: y is 2 more than x.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers