1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
anastassius [24]
3 years ago
8

The angle 0 lies in quadrant 1. sin 0=2/5 what is cos 0?

Mathematics
1 answer:
BaLLatris [955]3 years ago
7 0

Answer:

√21/5

Step-by-step explanation:

Took the quiz:D (that’s a fraction btw)

You might be interested in
PLEASE HELP ME evaluate cot pi/5
BaLLatris [955]
0.628 is your answer. hope this helps
6 0
3 years ago
Read 2 more answers
When a ________contains only numbers and at least<br> one operation it is called a _________.
Inessa05 [86]
Could you show us the picture or there isn’t one ?
6 0
3 years ago
The product of eight and a number Q is at least 32
Dennis_Churaev [7]
" the product " means multiply

the product of 8 and a number Q is at least 32...

8Q > = 32 (thats greater then or equal to)
3 0
3 years ago
Read 2 more answers
What is the gradient of the graph shown? <br><br> Give your answer in its simplest form.
harina [27]

1/3

Step-by-step explanation:

I used the points (0,2) and (-6,0). I hope this helps!

6 0
3 years ago
The efficiency for a steel specimen immersed in a phosphating tank is the weight of the phosphate coating divided by the metal l
34kurt

Answer:

Kindly check explanation

Step-by-step explanation:

Given the data:

Temp. 174 176 177 178 178 179 180 181

Ratio 0.86 1.31 1.42 1.01 1.15 1.02 1.00 1.74

Temp. 184 184 184 184 184 185 185 186

Ratio 1.43 1.70 1.57 2.13 2.25 0.76 1.37 0.94

Temp. 186 186 186 188 188 189 190 192

Ratio 1.85 2.02 2.64 1.53 2.48 2.90 1.79 3.16

A)

Using the online linear regression calculator, the lie of best fit which models the data above is :

ŷ = 0.09386X - 15.55523

Where ;

X = independent variable

ŷ = predicted or dependent variable

- 15.55523 = intercept

0.09386 = gradient / slope

B)

Point estimate when tank temperature is 186

ŷ = 0.09386(186) - 15.55523

ŷ = 17.45796 - 15.55523

ŷ = 1.90273

C)

Residual error (y - ŷ), ŷ = 1.90273 when x = 186

(0.94 - 1.90273) = −0.96273

(1.85 - 1.90273) = −0.05273

(2.02 - 1.90273) = 0.11727

(2.64 - 1.90273) = 0.73727

D)

To determine the proportion of observed variation in efficiency ratio, we find the Coefficient of determination R^2, which can be found using the online Coefficient of determination calculator : the r^2 value obtained is 0.4433.

5 0
3 years ago
Other questions:
  • On the first 4 quizzes of her chemistry class, nadia got an average score of 88. what does she need on the next quiz to have an
    11·1 answer
  • Find the interval between: 8:40 pm and 9:30 am​
    13·2 answers
  • For what value of a does the equation ax^2−3x−5=0 have 1 as one of its roots?
    7·1 answer
  • 5.) Solve 2x–71 = 12. Be sure to show all of your work.
    13·2 answers
  • Which of the following inequalities represents a number Y that is less than four but greater than -1
    11·1 answer
  • Transtutors the town barber shop can accommodate 35 customers per day. the manager has determined that if two additional barbers
    15·1 answer
  • –735 = 15(m + 929) m = _______
    6·1 answer
  • Mark bought a new video game priced at 49.99. A sales tax of 8% was added to his purchase. How much tax did Mark pay?
    12·1 answer
  • An isometric transformation is one in which preserves the shape and size of the pre-image. Which of the following transformation
    13·2 answers
  • Please help ! It's timed!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!