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Rasek [7]
3 years ago
5

Please help!!!!!!!!!!

Mathematics
2 answers:
EastWind [94]3 years ago
3 0
C 12 am ma js n a wiw. Jdjdjek koala.
stealth61 [152]3 years ago
3 0

Answer:

10

Step-by-step explanation:

The length is 6 meters more than twice the width of the rectangle, so...

If the width is 10 meters, that means the length must be 26 meters.

10 x 2 + 6 = 26

The perimeter equals 72 meters, so let's see if the sum of the sides add up.

w = 10   l = 26

10 + 10 = 20    

26 + 26 = 52

20 + 52 = 72!

Since the sum of the sides equals 72, the width of the rectangle must be 10, and the length must be 26.

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Alfie sells flooring for playgrounds.
dexar [7]

area of playground= 9×15= 135m^2

area of lawn= 3×4=12m^2

total flooring area= 135-12= 123m^2

cost=36×123=$4428

6 0
3 years ago
What are the solutions to the equation?
Maru [420]

rearrange the equation to where you set it equal to 0 by moving the 25 over.

n2 - 8n -9 = 0

now factor

(n-9)(n+1)

so n1 = 9

n2 = -1

6 0
3 years ago
Please help I still do not understand these questions
solniwko [45]

Answer:

m = 2/5

Step-by-step explanation:

easy

4 0
2 years ago
The width of a slot of a duralumin forging is (in inches) normally distributed with μ= 0.9000 and σ = 0.0030. The specification
Lubov Fominskaja [6]

Answer:

a) 9.56%

b) 0.0019

Step-by-step explanation:

a) Find the z-scores.

z = (x − μ) / σ

z₁ = (-0.0050) / 0.0030

z₁ = -1.67

z₂ = (0.0050) / 0.0030

z₂ = 1.67

Find the probability using a chart or calculator.

P(Z < -1.67 or Z > 1.67) = 2 P(Z < -1.67)

P(Z < -1.67 or Z > 1.67) = 2 (0.0478)

P(Z < -1.67 or Z > 1.67) = 0.0956

b) Use a chart or calculator to find the z-score.

P(Z < -z or Z > z) = 0.01

P(Z < -z) = 0.005

z = 2.576

Find the standard deviation.

z = (x − μ) / σ

2.576 = (0.0050) / σ

σ = 0.0019

4 0
3 years ago
PLEASE HELP
Nikolay [14]

Answer:

204,160,000

Step-by-step explanation:

Assuming the sample is a good representation of the people from the United States.

Since there were 1,000 surveyed... and 638 of them were wearing glasses,  that makes a proportion of 638 out of  1,000 people, or 63,8 / 100 people... so 63.8%... or 0.638

So, if we assume that the US population is of 320 million, how many people does that make wearing glasses.... we just have to multiply 320M by 0.638

G = 320,000,000 * 0.638 = 204,160,000

8 0
3 years ago
Read 2 more answers
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