All categories

3 years ago

Area & Surface Area:Question 3

Mathematics

1 answer:

podryga [215]3 years ago

4 0

Answer:

1200

Step-by-step explanation:

You find the are of one of the rectangles which is 25×10=250

There are 4 of the same size so we are at 1000

Then we do the squares on the side 10×10=100

There are 2 of the squares so we add 200

The answer is 1200

You might be interested in

Which ordered pair is a solution of the equation?<br> y+1 =3(2 – 4)

Kisachek [45]

The correct answer is C!

3 0

3 years ago

A) The distance around a rectangular room is 44 feet, and 120 tiles (each one is 1 sq. foot in size) are

Musya8 [376]

Answer:

Step-by-step explanation:

let x and y be the sides of the rectangle.

2(x+y)=44

x+y=44/2=22

y=22-x

1 tile=1 sq. ft.

120 tiles=120 sq.ft.

area=120 sq.ft.

xy=120

x(22-x)=120

22x-x²=120

x²-22x+120=0

x²-12x-10x+120=0

x(x-12)-10(x-12)=0

(x-12)(x-10)=0

x=12,10

if x=12

y=22-12=10

if x=10

y=22-10=12

floor dimensions are 12 ft ×10 ft

3 0

3 years ago

3x2 + 4x - 8 = 0?

Crazy boy [7]

Answer:

C) x = -

2 ± 2

Step-by-step explanation:

4 0

3 years ago

Utlizando el siguiente diagrama encuentra el valor de h

Nastasia [14]

Answer:

h=78.4

Step-by-step explanation:

2/1.25 = h/49

Cross multiplication

1.25h = 2x49

1.25h=98

h= 78.4

CHECK:

2/1.25 = 1.6

78.4/49=1.6

7 0

3 years ago

Suppose the life of a particular brand of laptop battery is normally distributed with a mean of 8 hours and a standard deviation

Ierofanga [76]

Answer:

4.75% probability that the battery will last more than 9 hours before running out of power

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 8, \sigma = 0.6$