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wlad13 [49]
4 years ago
15

What is the answer to 3(x-20)=15

Mathematics
2 answers:
Tpy6a [65]4 years ago
8 0
Answer: x=25

explanation: 3(x-20)=15
3x-60=15
+60 +60
3x=75
divide by 3 on both sides
x=25
Vikentia [17]4 years ago
5 0

Answer:25

Step-by-step explanation:15÷3=5 5+20=25

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2 years ago
A cylinder has a surface area of 1850 square meters and a radius of 9 meters. Estimate the volume of the cylinder to the nearest
Trava [24]
In order to find the volume you need the height. 

Surface area = π r² + base x height or width x length
1850 = 3.14 × 9² + radius × 2 x π x height
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To find the height you have to divide the surface area by the part I bolded

Height = 1850 ÷ 310.56
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4 years ago
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Alex777 [14]

Answer:

The correct option is b) 4.71

Step-by-step explanation:

Consider the provided information.

Test statistic for proportion: z=\frac{\hat p-p}{\sqrt{\frac{pq}{n}}}

It is given that the claim is that the proportion of accidental deaths of the elderly attributable to residential falls is more than 0.10, and the sample statistics include n=800 deaths of the elderly with 15 percent of them attribute to residential falls.

Therefore, \hat p=0.15, p = 0.1, q = 1-0.1 = 0.9 and n = 800.

Substitute the respective values in the above formula.

z=\frac{0.15-0.1}{\sqrt{\frac{0.1\times0.9}{800}}}

z=\frac{0.05}{\sqrt{\frac{0.09}{800}}}

z\approx4.71

Hence, the correct option is b) 4.71

3 0
3 years ago
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