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3 years ago

Evaluate the expression 2x+ y when x = 3. y=1.

Mathematics

2 answers:

Mkey [24]3 years ago

8 0

Answer:

$\boxed {\tt 7}$

Step-by-step explanation:

We are given the expression

$2x+y$

and asked to evaluate when x=3 and y=1. Therefore, we must substitute 3 in for x and 1 in for y.

$2(3)+1$

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction.

Multiply 2 and 3.

$6+1$

Add 1 and 6.

$7$

The expression 2x+y evaluated at x=3 and y=1 is equal to 7.

Katen [24]3 years ago

7 0

Answer:

2x+y+x=3+y=1

2x+x+y+y+3=1

2x+2y+3=1

2x+2y+3-3=1-3

2x+2y=-2

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C = 12*340 cal = 4,080 cal.

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2 years ago

Solve for x 8x−6=15 Give your answer as an improper fraction in its simplest form

kramer

Answer:

$\boxed{x = \frac{21}{8} }$

Step-by-step explanation:

=> 8x-6 = 15

Adding 6 to both sides

=> 8x = 15+6

=> 8x = 21

Dividing both sides by 8

=> x = 21/8 (In its simplest form)

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3 years ago

Evaluate the expression 2x+ y when x = 3. y=1.​

Evaluate the expression 2x+ y when x = 3. y=1.