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svetlana [45]
3 years ago
12

Brad says that if a second number is 125% of the first number than the second number must be 75% of the second number is he corr

ect justify your answer
Mathematics
1 answer:
elena-s [515]3 years ago
5 0

Answer:

Incorrect.

Step-by-step explanation:

Let, the first number is x, and the second number is y. Given, the second number is 125% of the first number. So, the equation will be

y = 1.25 x

Or, y= 5/4x

Now, multiplying it with 4/5, we get, x= 4/5y

Or, x= 0.80 y

But, Brad is saying the first number must be 75% of the second number. But here we see that the first number is 80% of the second number. That's why Brad is incorrect.

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A grocery store sells a bag of 5 lemons for $2.00 what is the unite cost of each lemon in the bag.
QveST [7]

Answer:

.40 per lemon

Step-by-step explanation:

Take the total cost of the lemons and divide by the number of lemons

2.00 /5 = .40 per lemon

5 0
3 years ago
A manufacturer is interested in the output voltage of a power supply used in a PC. Output voltage is assumed to be normally dist
Luda [366]

The missing values in the question are shown in bold forms below.

A manufacturer is interested in the output voltage of a power supply used in a PC. Output voltage is assumed to be normally distributed, with standard deviation of 0.25 V, and the manufacturer wished to test \mathbf{ H_o : \mu = 10 V  \ against \ H_1 : \mu  \neq 10V}, using  n = 10 units. Statistical Tables and Charts

(a) The critical region is \mathbf{\overline X < 9.83} or \mathbf{\overline X < 10.17} . Find the value of  \mathbf{\alpha }

Answer:

∝ = 0.032   (to 3 decimal place)

Step-by-step explanation:

From the given information:

P(\overline X < 9.83 ) + P( X> 10.17) = \bigg (1- P \bigg ( \dfrac{X - \mu}{\dfrac{\sigma}{\sqrt{n}}} \bigg )< Z<  \bigg ( \dfrac{X - \mu}{\dfrac{\sigma}{\sqrt{n}}} \bigg ) \bigg )

P(\overline X < 9.83 ) + P( X> 10.17) = \bigg (1- P \bigg ( \dfrac{9.83 - 10}{\dfrac{0.25}{\sqrt{10}}} \bigg )< Z<  \bigg ( \dfrac{10.17- 10}{\dfrac{0.25}{\sqrt{10}}} \bigg ) \bigg )

P(\overline X < 9.83 ) + P( X> 10.17) = \bigg (1- P \bigg ( \dfrac{-0.17}{\dfrac{0.25}{\sqrt{10}}} \bigg )< Z<  \bigg ( \dfrac{0.17}{\dfrac{0.25}{\sqrt{10}}} \bigg ) \bigg )

P(\overline X < 9.83 ) + P( X> 10.17) = \bigg (1- P \bigg (-2.15 \bigg )< Z<  \bigg ( 2.15 \bigg ) \bigg )

From the z - tables;

P(\overline X < 9.83 ) + P( X> 10.17) = \bigg (1- (0.9842 -0.0158) \bigg )

\alpha = \mathbf{P(\overline X < 9.83 ) + P( X> 10.17) = 0.032}

5 0
3 years ago
Can anyone help me with these 8 answers pls ASAP
Lisa [10]

SOLUTION:

m\angle C=63^o,AB=28,AC=29,find\text{  }m\angle B

A simple sketch will help;

We can use the sine rule to solve for the angle B;

\begin{gathered} \frac{28}{sin63}=\frac{29}{sinB} \\  \\ sinB=\frac{29sin63}{28} \\  \\ sinB=0.9228 \\  \\ B=67.34^o \end{gathered}

Thus;

m\angle B=67.34^o

3 0
1 year ago
Royce walks 3/4 mile to school and 3/4 mile home each day. In how many days will he have walked 3 miles
gregori [183]
First add the 3/4 together (That equals 1 2/4 which can be simplified into 1 1/2 or 1.5)
Then divide 3 by 1.5.( Which is 2)

Royce will have walked 3 miles in 2 days.
3 0
3 years ago
7.
nikitadnepr [17]

Answer:

$46

Step-by-step explanation:

40(0.15) = 6 (this is the amount of the tip)

40 + 6 = 46 (add the tip to the bill)

7 0
4 years ago
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