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
Musya8 [376]
3 years ago
14

What is the solution to -4x+5y=14 and 7x+3y=-1 I need the answer now.

Mathematics
2 answers:
Vlad [161]3 years ago
8 0
X= -1 and y=2
Proof:
-4x+5y=14 (equation 1)
7x+3y= -1 (equation 2)

3y= -7x -1
y= -7/3x -1/3 (equation 3)
(3) into (1)
-4x+5(-7/3x-1/3)=14
-4x-35/3x-5/3=14
-47/3x-5/3=14
-47/3x=47/3
x= (-47/3)/ (47/3)
x= -1 
sub x= -1 into (3)
y= -7/3(-1)-1/3
y= 2



Serjik [45]3 years ago
7 0
One way to solve is to try to cancel out some terms
we till try to cancel out the y terms

-4x+5y=14
7x+3y=-1
find lcm of 3 and 5 the lcm=15
-4x+5y=14
multily by 3
-12x+15y=42

7x+3y=-1
multiply both sides by -5
-35x-15y=5
add 2 equations together
-12x-35x+15x-15x=42+5
add like terms
-47x=47
divide both sides by 47
-x=1
multpiply by -1
x=-1

subsitute -1 for x in one quation

7x+3y=-1
x=-1
7(-1)+3y=-1
-7+3y=-1
add 7 to both sides
3y=6
divide both sides by 3
y=2


x=-1
y=2
You might be interested in
SOMEONE HELP ASAP PLEASE?
hammer [34]

Answer:

B is the correct answer.

Step-by-step explanation:

6 0
3 years ago
Please answer right away
Ilya [14]

Answer:

6.13

Step-by-step explanation:

Using Sine Law we know that

\dfrac{a}{SinA}=\dfrac{b}{SinB}=\dfrac{c}{SinC}

Using your figure let's assign sides and angles:

A=? B = 60° C = 70°

a = 5 b = ? c = x

If we put that into our formula:

\dfrac{5}{Sin?}=\dfrac{?}{Sin60}=\dfrac{x}{Sin70}

Notice that we have too many unknowns. We need to complete at least one ratio to do this, so how do we do this?

Notice we have 2 angles given, so we solve for the third angle. The sum of all angles in any triangle is always 180°

∠A + ∠B + ∠C= 180°

∠A + 60° + 70° = 180°

∠A + 130° = 180°

∠A = 180° - 130°

∠A = 50°

Now we can use this to solve for x.

\dfrac{5}{Sin50}=\dfrac{x}{Sin70}\\\\\dfrac{(5)(Sin70)}{Sin50} = x\\\\\dfrac{4.6985}{0.7660}=x\\\\6.1338 =x

So the closest answer would be 6.13

5 0
4 years ago
Read 2 more answers
How do you find the derivative of y=tan(arcsin(x))y=tan(arcsin(x)) ?
pychu [463]
Answer is in the attachment below. If you have any questions about the workings, just leave a comment below.

8 0
3 years ago
Read 2 more answers
3x = 6<br><br> Help me p l e a s e
GuDViN [60]

Answer:

x=2

Step-by-step explanation:

have a nice day

3 0
3 years ago
How many different 10-letter words (real or imaginary) can be formed from the letters of the word LITERATURE?
nordsb [41]

Answer:

The number of words that can be formed from the word "LITERATURE" is 453600

Step-by-step explanation:

Given

Word: LITERATURE

Required: Number of 10 letter word that can be formed

The number of letters in the word "LITERATURE" is 10

But some letters are repeated; These letters are T, E and R.

Each of the letters are repeated twice (2 times)

i.e.

Number of T = 2

Number of E = 2

Number of R = 2

To calculate the number of words that can be formed, the total number of possible arrangements will be divided by arrangement of each repeated character. This is done as follows;

Number of words that can be formed = \frac{10!}{2!2!2!}

Number of words = \frac{10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1}{2 * 1 * 2 * 1 * 2 * 1}

Number of words = \frac{3628800}{8}

Number of words = 453600

Hence, the number of words that can be formed from the word "LITERATURE" is 453600

8 0
3 years ago
Other questions:
  • 37 + 20x = 117<br> what is x?
    6·2 answers
  • Please What is 0.5% of 1635
    10·1 answer
  • Work out m and c for the line: y = 9 − x
    7·1 answer
  • 145 pounds to 132 pounds
    15·2 answers
  • How to do 43 ?<br> Thank you!
    14·1 answer
  • How much interest will jovanny pay on a 60 month auto loan for $45,500 with a compound interest of 13.7 %??
    10·1 answer
  • Brian wants to have $7000 in the bank in 10 years. He deposits $3000 today at 8% interest compounded semiannually,After keeping
    14·2 answers
  • Please help brainliest and 20 points!
    13·1 answer
  • Simplify. Multiply and remove all perfect squares from inside the square roots. Assume z is positive. z* 30z2* 35z3
    11·1 answer
  • -8x - (3x + 6 ) = 4 - x
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!