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3 years ago

PLEASE HELP!! WILL MARK BRAINLEST!!!

Mathematics

2 answers:

ivanzaharov [21]3 years ago

8 0

Answer: $64cm$

Step-by-step explanation:

$length=3w\\width=w\\area=192cm^2\\perimeter=?$

First, using the area formula, find length and width;

$A=l*w$

$192=3w*w$

$192=3w^2$

Divide by 3.

$\frac{192}{3}=w^2$

$64=w^2$

Extract the square root.

$\sqrt{64}=w\\ 8=w$

Now that you found the width; find length.

if length is three times width; multiply the width by 3.

8*3=24cm

Now that you have all the information, find the perimeter.

$P=2(l+w)\\P=2(24+8)\\P=2(32)\\P=64cm$

miss Akunina [59]3 years ago

5 0

Answer:

x: length

y: wide

x = 3y and x*y =192

=> 3y^2 = 192

=> y = 8 => x =3x8 = 24

=> Perimeter = (x+y)*2 = (8+24)*2 = 64

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Find the slope of the line that contains the two points (0,1) and (1,3)

klio [65]

Answer:

m=2 or y=2x+1

Step-by-step explanation:

first use the y2-y1/x2-x1 formula and then use y=mx+b formula

plug in 3 for y2 and 1 for y1

plug in 1 for x2 and 0 for x1

$\frac{3-1}{1-0} =\frac{2}{1} =2$

so ur slope is 2

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for y=mx+b *extra info ig if u need it just incase*

i usually use the first point for this but u can use any one u want

plug in 0 for x

plug in 1 for y

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7 0

3 years ago

Jada invest $590 in a money market account. Her account pays 7% simple interest. How much interest will Jada earn after 4 years

mote1985 [20]

Answer:

165.2

Step-by-step explanation:

7%x4=28

28 percent of 590 = <u>165.2</u>

7 0

2 years ago

With a little care, you can find the median and the quartiles from the histogram. what are these numbers? you can also find the

coldgirl [10]

Complete Question

The histogram from this question is shown on the first uploaded image

Answer:

The first quartile is $1st Q = 19^{th} girl (subject ) = 1 \serving\ of\ fruit\ per\ day$

The median is $Median = 38 ^{th} \ girl (subject) = 2 \serving\ of\ fruit\ per\ day$

The third quartile is $3rd Q = 56^{th} \ girl (subject) = 4 \serving\ of\ fruit\ per\ day$

The mean is $\= x = 2.62$

Step-by-step explanation:

From the question we are told that

The total number of girls is n = 74

Generally the median is mathematically represented as

$Median = \frac{\frac{n}{2} +[ \frac{n}{2} + 1] }{2}$

$Median = \frac{\frac{74}{2} +[ \frac{74}{2} + 1] }{2}$

=> $Median = \frac{37 +38 }{2}$

=> $Median =37.5 \ girl$

From the histogram $37.5 \approx 38^{th} \ girl$ fall under 2 fruits per day

Generally the first quartile is mathematically represented as

$1st \ Q = \frac{\frac{n}{4} + [\frac{n}{4} + 1] }{2}$

=> $1st \ Q = \frac{\frac{74}{4} + [\frac{74}{4} + 1] }{2}$

=> $1st \ Q = 19 \ girl$

From the histogram $19^{th}$ girl fall under 1 fruit per day

Generally the third quartile is mathematically represented as

$3rd\ Q = \frac{\frac{n}{2} + n }{2}$

=> $3rd\ Q = \frac{\frac{74}{2} + 74 }{2}$

=> $3rd\ Q = 55.5$

From the histogram $55.5 \approx 56^{th} \ girl$ fall under 4 fruits per day

Generally from the histogram table the frequency [number of subjects (girls) ] and the servings of fruit per day can be represented as

Total

x(servings per day ) 0 1 2 3 4 5 6 7 8

f (number of subjects ) 15 11 15 11 8 5 3 3 3 $\sum f = 74$

xf 0 11 30 33 32 25 18 21 24 $\sum xf = 194$

Generally the mean is mathematically represented as

$\= x = \frac{1}{ \sum f} * [\sum xf]$

=> $\= x = \frac{1}{ 74} *194$

=> $\= x = 2.62$

4 0

3 years ago

Round 12.5478 to the nearest hundredths

solong [7]

Answer:

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Step-by-step explanation:

Find the number in the hundredth place 4 and look one place to the right for the rounding digit 1 . Round up if this number is greater than or equal to 5 and round down if it is less than 5 .

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3 years ago

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maw [93]

Answer:

$\frac{6x}{18}$

Step-by-step explanation:

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