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2 years ago

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

Mathematics

2 answers:

Molodets [167]2 years ago

8 0

It’s the last one, n<1.3 hope this helps.

kap26 [50]2 years ago

7 0

Answer:

Step-by-step explanation:

imagen the inequality sign is a normal equal sign so you would just do it as a normal problem solving for the variable.

so first get n by its self so you start by gettting rid of 8.7, so to cancle it out you minus it by its self and what you do to one side you do to the other.

now you have -2.5n > -3.25

divide it by its self by both sides and you get 1.3

and because you divided by a negative your sign switches to the other side. It’s called the negative division rule

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I am pretty sure your answer will be 96783564.8, but it may need to be rounded. If I am wrong, I am sorry.

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2 years ago

What is 52cm as a fraction of 90cm? (as a simplified fraction)

katrin2010 [14]

Answer:

$\frac{26}{45}$ and $\frac{3}{11}$

Step-by-step explanation:

(a)

Expressing as a fraction

$\frac{52}{90}$ ( divide numerator/ denominator by 2 )

= $\frac{26}{45}$ ← in simplest form

(b)

Expressing as a fraction

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2 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

2 years ago

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ZanzabumX [31]

The answer is X= -25

7 0

2 years ago

Please choose two answer whoever responds first i will mark brainliest

Reika [66]

Answer:

Green and Orange

Step-by-step explanation:

Green has 6 marbles in the bag and has the most marbles pulled (30), so that is one of the answers. Red and orange are tied with 5 marbles in the bag, but red only got pulled 19 times and orange got pulled 25 times. Therefore, your answers are green and orange.

6 0

3 years ago

Read 2 more answers