3 years ago

The length of a rectangle is 2 m longer than its width. if the perimeter of the rectangle is 40 m , find its area.

1 answer:

4 0

L=w+2 and 2w+2l=40

Substitute length for w+2 in perimeter formula.

2w+2(w+2)=40
2w+2w+4=40
4w+4=40
4w=36
w=9

l=w+2
l=9+2
l=11

a=lw=11*9=99 meters

You might be interested in

An education firm measures the high school dropout rate as the percentage of 16 to 24 year olds who are not enrolled in school a

posledela

Answer:

The value of the test statistic $z = -0.6606$

Step-by-step explanation:

From the question we are told that

The high dropout rate is $\mu = 6.1$ % $= 0.061$

The sample size is $n = 1000$

The number of dropouts $x = 56$

The probability of having a dropout in 1000 people $\= x = \frac{56}{1000} = 0.056$

Now setting up Test Hypothesis

Null $H_o : p = 0.061$

Alternative $H_a : p < 0.061$

The Test statistics is mathematically represented as

$z = \frac{\= x - p}{\sqrt{\frac{p(1 -p)}{n} } }$

substituting values

$z = \frac{0.056 - 0.061}{\sqrt{\frac{0.061(1 -0.061)}{1000} } }$

$z = -0.6606$

6 0

3 years ago

Which of the following numbers has the smallest value? 19.45 19.445 19.5 19.454

marishachu [46]

19.445 is the answer as you can see...
first you need to see the 1 decimal place which is like the number smaller than 1, eg:0.5,0.4 then later you see the 2 decimal place and later third on order to find out...

3 0

3 years ago

Read 2 more answers

Jacob wrote the expression shown. 10 + 5 + 4(72-6) What do these parentheses indicate in the expression? F Divide 10 by 5 before

icang [17]

You would multiply 4 by 72 then u multiply 4 * -6 then after that you would add 15

7 0

3 years ago

Help ASAP! Correct answer will be marked BRAINLIEST!!!

Nataly_w [17]

Answer:

not telling u the answer but first multiply 2 x 2 1/2 (4 1/2) then add that to 6 2/5

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Help please it’s scatter plots

gogolik [260]

I can’t see the picture

8 0

3 years ago