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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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3 years ago

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FrozenT [24]

Answer:

15 possible combinations

Step-by-step explanation:

Given

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$^6C_2 = \frac{6!}{(6-2)!2!}$

$^6C_2 = \frac{6!}{4!2!}$

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3 years ago

Idahtonye has ₦50.00. He buys six mangoes and gets ₦2 change. Find the average cost of one mango. step by step explanation.

arsen [322]

Answer:

The average cost of one mango = c = ₦8

Step-by-step explanation:

Let 'c' be the average cost of one mango

The original amount Idahtonye has = ₦50.00

The amount of mangoes Idahtonye buys = 6 mangoes

As he gets back the change of ₦2 after paying ₦50.00 to buy 5 mangoes.

Thus the equation becomes

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48 = 6c

dividing both sides by 6

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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.