3 years ago

A rectangle has a length of 2x+3 and a width of 10x-4. Find the perimeter and area of the figure

Mathematics

1 answer:

inn [45]3 years ago

4 0

Step-by-step explanation:

perimeter is 4x+6 +20x-8=20x-2

area is 20x^2+22x-12

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A rectangular garden has a length that is five less than twice the width. the garden perimeter is 50 meters. what are the dimens

Nonamiya [84]

P=2L+2W and L=2W-5

2(2W-5)+2W=50
4W-10+2W=50
6W-10=50
6W=60
W=10

6 0

3 years ago

Five people per 1000 square feet are allowed to enter a building Whose total dimensions is 180,000 square feet How many people c

Ludmilka [50]

Answer:

900

Step-by-step explanation:

5 people are said to occupy a 1000square feet space

That means we have to look out for how many 1000 square feets are in 180000

That would be 180000/1000 = 180

But 1000 square occupies 5 persons and there are 180 1000square which can occupy 5 people in 180 000 square.

Hence 180 × 5= 900 is the number of persons that the hall can occupy.

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3 years ago

What does r equal in 4r+5=3r

vekshin1

4r+5=3r can also be written
4r=3r-5
1r=-5

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3 years ago

Use the graph representing bacteria decay to estimate the domain of the function and solve for the average rate of change across

kykrilka [37]

0 < x < 18 , - 3 . 33

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3 years ago

Read 2 more answers

A random sample of the amounts for 22 purchases was taken. The mean was $42.97, the standard deviation was $22.82, and the m

Illusion [34]

Answer: a) 84 and b ) 2084

Step-by-step explanation:

Given : Sample standard deviation : s= $22.82

(Population standard deviation is unknown ) , so we use t-test.

Critical value or the 95% confidence intervals : $t_{n-1}*=2.0$

Formula to find the sample size :

$n=(\dfrac{t^*\cdot s}{E})^2$

a) E = 5

$n=(\dfrac{(2)\cdot 22.82}{5})^2$

$n=(9.128)^2=83.320384\approx84$

i.e. Required sample size : n= 84

b) E = 1

$n=(\dfrac{(2)\cdot 22.82}{1})^2$

$n=(45.64)^2=2083.0096\approx2084$

i.e. Required sample size : n= 2084

8 0

3 years ago