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dmitriy555 [2]
3 years ago
14

Plz guys help me I need help

Mathematics
1 answer:
melisa1 [442]3 years ago
5 0

Answer:

A. f(-1) = -3, f(7) = 13

Step-by-step explanation:

✔️When input (n) = -1:

f(n) = 2n - 1

f(-1) = 2(-1) - 1

f(-1) = -2 - 1 = -3

✔️When input (n) = 7:

f(n) = 2n - 1

f(7) = 2(7) - 1

f(-1) = 14 - 1 = 13

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Help please it would help my grade alot
Alexxandr [17]

Answer:

It cooled 58.4 degrees

Step-by-step explanation:

T(t) = 68 + 144e ^(-.052t)

We want to find the value when t= 10

T(10) = 68 + 144e ^(-.052*10)

        = 68 +85.611

 T(10)         =153.611

We also need to know

T(0)= 68 + 144e ^(-.052*0)

       =68+144

        =212

We want to know how much it cools

That would be the temperature at  time 0 minus the temperature at  time 10


T(0) - T (10)

212-153.611

58.389

To the nearest tenth

58.4 degrees

3 0
3 years ago
tapes-r-us is have a sale on hq tape players. The regular price is $60. The discount is $18. What percent discount is this?
olga nikolaevna [1]

The discount is 30%

Step-by-step explanation:

Given

Price of tape = $60

Discount = $18

In order to find the percentage, we will use the percentage formula

Percentage = \frac{discount}{Price}*100\\= \frac{18}{60} *100\\=0.3 * 100\\= 30\%

Hence,

The discount is 30%

Keywords: Percent, sale

Learn more about percentage at:

  • brainly.com/question/6554402
  • brainly.com/question/6500232

#LearnwithBrainly

7 0
3 years ago
Z=<br><br> 37 <br><br> 51 <br><br> 39<br><br> Triangles and Trigonometry
san4es73 [151]

Answer:

z =  { \tan( \frac{10}{8} ) }^{ - 1}  \\ z =(51.34019174591)

So the corect answer is (51)

5 0
3 years ago
Is the sum of two mixed numbers always a mixed number
Hoochie [10]
No it is not always a mixed number if you add two mixed numbers
5 0
3 years ago
Read 2 more answers
If you answer this correctly I’ll give you brianslt
TEA [102]

Answer:

Step-by-step explanation:

6,0 would be your coordinates

2,4

6,12

meaning that the numbers are multiplied by three. you can see the points without having to plot it on a graph

7 0
3 years ago
Read 2 more answers
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