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
Tasya [4]
2 years ago
5

Please!!! I’ll mark Brainliest!! I really need help!!!

Mathematics
1 answer:
Tatiana [17]2 years ago
5 0

Answer:

(x, \:  \: y) = (4, \:  \:  -  \frac{1}{4} )

Step-by-step explanation:

\frac{1}{4} x + \cancel{ 1 \frac{1}{2} y} =  \frac{5}{8}...(1)  \\  \\  \frac{3}{4} x  - \cancel{ 1 \frac{1}{2} y} = 3 \frac{3}{8} ...(2) \\  -  -  -  -  -  -  -  -  - \\(adding\: equations\: 1 \:\&\:2) \\ ( \frac{1}{4}  +  \frac{3}{4} )x =  \frac{5}{8}  + 3 \frac{3}{8}  \\  \\  \frac{4}{4} x =  \frac{5}{8}  +  \frac{27}{8} \\  \\   x =  \frac{32}{8} \\  \\ x = 4 \\  \\ plug \: x = 4 \: in \: equation \: (1) \\  \\  \frac{1}{\cancel 4}  \times \cancel 4 + 1 \frac{1}{2} y =  \frac{5}{8}  \\  \\ 1 +  \frac{3}{2} y =  \frac{5}{8}  \\  \\ \frac{3}{2} y =  \frac{5}{8}   - 1\\  \\ \frac{3}{2} y =  \frac{5 - 8}{8}\\  \\ \frac{3}{2} y =  \frac{ - 3}{8}\\  \\ y =   \frac{ - 3}{8} \times  \frac{2}{3}  \\  \\ y =  \frac{1}{4}  \\  \\ (x, \:  \: y) = (4, \:  \:  -  \frac{1}{4} )

You might be interested in
The courtyard behind jennies house is shaped like a trapaziod. The base mesures 8 meters and 15 meters.The height of the trapazo
77julia77 [94]
Formula for trapezoid area is A=b1+b2 x heightx 1/2 so your answer would be 161m squared
7 0
3 years ago
What is f(6) for the function f(x)=3x-8 a answer not here b -144 c -8 d 10
jonny [76]

Answer:

D. 10

Step-by-step explanation:

Given f(x)=3x-8

f(6)=3(6)-8

f(6)=18-8

f(6)=10

3 0
3 years ago
Verify that (cos²a) (2 + tan² a) = 2 - sin² a....<br>​
Sveta_85 [38]

Trigonometric Formula's:

\boxed{\sf \ \sf \sin^2 \theta + \cos^2 \theta = 1}

\boxed{ \sf tan\theta = \frac{sin\theta}{cos\theta} }

Given to verify the following:

\bf (cos^2a) (2 + tan^2 a) = 2 - sin^2 a

\texttt{\underline{rewrite the equation}:}

\rightarrow \sf (cos^2a) (2 + \dfrac{sin^2 a}{cos^2 a} )

\texttt{\underline{apply distributive method}:}

\rightarrow \sf 2 (cos^2a) + (\dfrac{sin^2 a}{cos^2 a} ) (cos^2a)

\texttt{\underline{simplify the following}:}

\rightarrow \sf 2cos^2 a  + sin^2 a

\texttt{\underline{rewrite the equation}:}

\rightarrow \sf 2(1 - sin^2a )  + sin^2 a

\texttt{\underline{distribute inside the parenthesis}:}

\rightarrow \sf 2 - 2sin^2a   + sin^2 a

\texttt{\underline{simplify the following}} :

\rightarrow \sf 2 - sin^2a

Hence, verified the trigonometric identity.

7 0
2 years ago
Read 2 more answers
Whats the circumference?
ioda

Answer:

40.82

Step-by-step explanation:

3.14 times 13

5 0
2 years ago
30 54
pishuonlain [190]

Answer:4

Step-by-step explanation:

1 plus 6

7 0
3 years ago
Other questions:
  • Tomas grandfather is 100 years old.tomas grandfather is 10 times as old as tomas .how los is tomas?
    8·1 answer
  • A lock on a bank vault consists of 3 dials, each with 30 positions. In order for the vault to open, each of the three dials must
    7·1 answer
  • Find BC<br>AC = 7<br>BD = 7.5<br>DE = 1.5<br>AE = 11​
    12·1 answer
  • Using traditional methods, it takes 10.0 hours to receive a basic driving license. A new license training method using Computer
    14·2 answers
  • Mary invested $5000 in the bank. How much money does she have at the end of 15 years if the interest rate is 4.5% per annum ? A
    14·1 answer
  • Please help <br> 64-20s+s 2squared
    12·1 answer
  • What is 4/5 written as a percentage
    14·2 answers
  • Pls help me with my homework​
    13·2 answers
  • How much interest will be earned on a $2000 investment at 8.29% compounded
    8·1 answer
  • What is the awnser<br><br><br> 5+5 =?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!