3 years ago

What is the value of 3x+7 when x=3

Mathematics

2 answers:

Margaret [11]3 years ago

4 0

Answer:

The answer will be 16

Step-by-step explanation:

If x is 3, then 3x will become 3 * 3 which will get you 9. And then 9 adds 7 and gets 16

GaryK [48]3 years ago

3 0

Answer:

Step-by-step explanation:

3x+7

3(3)+7

9+7=16

I hope this is correct and have a great day

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Jim weighs 30 pounds less than Tom, and together they weigh 210 pounds. Let n = Tom's weight in pounds. How much does Tom weigh?

never [62]

First, let's write an equation for the situation.

Jim's weight is 30 pounds less than Tom's, so his weight is:

n - 30

If Tom's and Jim's weights add to 210:

n + (n - 30) = 210

Solve for n:

2n - 30 = 210

2n = 240

n = 120

Tom weighs 120 pounds.

5 0

3 years ago

A company conducts research to predict how a new advertisement affects sales of a product. The equation n = 0.08 r + 7400 can be

VLD [36.1K]

Answer:

1200

Step-by-step explanation:

n = 0.08 r + 7400

n = 7496, r = ?

7496 = 0.08r + 7400

7496 - 7400 = 0.08r

96 = 0.08r