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3 years ago

Y = –x + 4 x + 2y = –8 How many solutions does this linear system have?

Mathematics

2 answers:

masya89 [10]3 years ago

4 0

It only has one solution. x= 16 and y = -12

Daniel [21]3 years ago

4 0

I just took the test, it's no solution. C

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2 years ago

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Clare estimates that her brother is 4 feet tall. When they get measured at the doctor’s office, her brother’s actual height is 4

attashe74 [19]

Her error in terms of inches was 2 inches while her percent error was 4.166%

Step-by-step explanation:

Step 1; From the given data Claire estimated her brother to be shorter than he actually was. She estimated his height to be 4 feet while it was actually 4 feet 2 inches.

We convert the feet into inches because 12 inches are equal to a feet.

4 feet = 4 × 12 inches = 48 inches

4 feet 2 inches = (4 × 12 inches) + 2 inches = 48 + 2 = 50 inches

Error in terms of inches = 50 inches - 48 inches = 2 inches.

Step 2 ; Her percent error is given by dividing the difference in values by the actual value multiplied by 100.

% error = (difference in values / actual value) × 100

Claire's % error = (50 - 48)/ 48 × 100 = 2/48 × 100 = 0.04166 × 100 = 4.166%.

4 0

2 years ago

& What value of x satisfies the system of equations below! x+2y= 11 4x - y = 8

mash [69]

Answer:

$\boxed{\sf{x=3 \quad y=4}}$

Step-by-step explanation:

Isolate the term of x and y from one side of the equation.

⇒ x+2y=11

⇒ x=11-2y

Substitute.

4(11-2y)-y=8

Solve.

Distributive property:

⇒ A(B+C)=AB+AC

4(11-2y)

4*11=44

4*2=8

Rewrite the problem down.

44-9y=8

Subtract by 44 from both sides.

44-9y-44=8-44

Solve.

-9y=-36

Divide by -9 from both sides.

-9y/-9=-36/-9

Solve.

-36/-9=4

y=4

Substitute of y=4.

⇒ x=11-2*4

Use order of operations.

PEMDAS stands for:

Parentheses
Exponents
Multiply
Divide
Add
Subtract

11-2*4

Multiply.

2*4=8

Rewrite the problem down.

11-8

Subtract.

11-8=3

x=3

Therefore, the correct answer is x=3 and y=4.

I hope this helps you! Let me know if my answer is wrong or not.

5 0

1 year ago