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3 years ago

{1, -2),(-2, 0),(-1, 2),(1, 3)} Function

Mathematics

1 answer:

Over [174]3 years ago

7 0

Answer:

this is a function

Step-by-step explanation:

the x does not repeat itself

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Part A: Joel uses the incorrect expression 0.95(190)(0.8) to calculate that the computer will cost him a total of $144.40. Descr

notka56 [123]

Answer:

Part A) The correct Expression : (1.05)(190)(0.8)

=> The error of Joel was that instead of adding the sales tax, he subtracted it.

Part B) $159.60

Step-by-step explanation:

Part A:

To calculate the computer cost, we need to find out the selling price first.

There's a discount of 20% so the selling price will be 100% - 20% = 80% =>80/100 = 0.8

So, We'll multiply the cost price by 0.8

=> (190)(0.8)

But, there is a sales tax of 5%

So, the selling price with cost price will be:

=> 100% + 5% = 105% => 105/100 = 1.05 (We'll multiply this too with the first equation that we made above)

So, the expression will be:

=> (1.05)(190)(0.8)

The error of Joel was that instead of adding the sales tax, he subtracted it.

Part B)

Joel will pay for the tablet:

=> (1.05)(190)(0.8) [We used the above expression]

=> $159.60

6 0

3 years ago

What is the lenght of PQ P is 2,1 Q is 5,6

Elodia [21]

Answer:

7,7

Step-by-step explanation:

Possibly 7,7 becuase p+q=pq, therefor 2,1+5,6=7,7

4 0

3 years ago

Can someone please helppp will give you lots of points and brainliest

harkovskaia [24]

4. SOLVE FOR X:

Using the Alternate Interior Angles Theorem, we know that the 67 degree angle is congruent with the (12x - 5) degree angle. With this information, all I have to do is set the two equal to each other and solve for x.

67 = 12x - 5

67 + 5 = 12x - 5 + 5

72/12 = 12x/12

6 = x

x = 6

SOLVE FOR Y:

Using the Vertical Angles theorem, we know that angle y must be congruent to the 67 degree angle.

y = 67 degrees.

5. SOLVE FOR Y:

Alternate exterior angles: 6(x - 12) = 120

6x - 72 + 72 = 120 + 72

6x/6 = 192/6

x = 32

SOLVE FOR Y:

6((32) - 12) + y = 180

192 - 72 + y = 180

120 + y - 120 = 180 - 120

y = 60

8 0

3 years ago

Read 2 more answers

3. A researcher randomly selects a sample of 61 former student leaders from a list of graduates of UNCG who had participated in

Sophie [7]

Answer:

not statistically significant at ∝ = 0.05

Step-by-step explanation:

Sample size( n ) = 61

Average for student leader graduates to finish degree ( x') = 4.97 years

std = 1.23

Average for student body = 4.56 years

Determine if the difference between the student leaders and the entire student population is statistically significant at alpha

H0( null hypothesis ) : u = 4.56

Ha : u ≠ 4.56

using test statistic

test statistic ; t = ( x' - u ) / std√ n

= ( 4.97 - 4.56 ) / 1.23 √ 61

= 2.60

let ∝ = 0.05 , critical value = -2.60 + 2.60

Hence we wont fail to accept H0

This shows that the difference between the student leaders and the entire student population is not statistically significant at ∝ = 0.05

3 0

3 years ago

Joey bought 10 cupcakes and has four friends. He wants to have nothing left, but he wants everyone including him to have the sam

Roman55 [17]

we use divsion, 10 divided by 5 is 2, everyone get 2 yumy cupcakes.

8 0

3 years ago