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3 years ago

Someone please help me

Mathematics

1 answer:

wel3 years ago

3 0

V=(hπr^2)/3, π≈3.14, h=7, r=2

V≈29.3 cm^2

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Solve<br><br> 4(3x - 2) = 52

guapka [62]

Answer:

x= 5

Step-by-step explanation:

first we open brackets

12x-8=52

then transpose

12x= 52+8

12x= 60

x= 60/12

x= 5

hope it helps , pls mark me as brainliest

5 0

3 years ago

Is (p3)4 • p8 = p20 true or false ?

Oduvanchick [21]

P3(4) = p12 them p12 * p8 = P160 (false)

8 0

3 years ago

Why is this action surprising. HELP PLEASE

jenyasd209 [6]

Answer:

The first one sounds suprising but what is the action?

6 0

3 years ago

It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 122 feet. A transportat

madreJ [45]

Complete Question

The complete question is shown on the first uploaded image

Answer:

the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

The test statistics is $t = - 1.761$

The p-value is $p = P(Z < t ) = 0.039119$

$p \ge 0.01$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 122$

The sample size is n= 38

The sample mean is $\= x = 116 \ feet$

The standard deviation is $\sigma = 21$

Generally the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

Generally the test statistics is mathematically evaluated as

$t = \frac { \= x - \mu }{\frac{ \sigma }{ \sqrt{n} } }$

substituting values

$t = \frac { 116 - 122 }{\frac{ 21 }{ \sqrt{ 38} } }$

$t = - 1.761$

The p-value is mathematically represented as

$p = P(Z < t )$

From the z- table

$p = P(Z < t ) = 0.039119$

$p \ge 0.01$

4 0

3 years ago

If f(x)=x/2 and g(x) = x-3,what is the value of g(f(8))

pochemuha

F(x) = x/2
g(x) = x - 3

f(8) = 8/2 = 4

g(f(x)) = 4 - 3 = 1

Answer g(f(8)) = 1

7 0

3 years ago

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