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kow [346]
2 years ago
7

Evaluate the expression.

Mathematics
2 answers:
mr Goodwill [35]2 years ago
5 0

Answer:

21

Step-by-step explanation:

We need to follow PEMDAS

15+3*2

We need to multiply first

3*2 = 6

Then we add

15+6

21

Hunter-Best [27]2 years ago
4 0

Answer:

21

Step-by-step explanation:

We use (BODMAS) :

Brackets

Order/Index

Division

Multiplication

Addition

Subtraction

15 + 3 × 2

We do multiplication before addition :

3 × 2 = 6

15 + 6 = 21

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Gekata [30.6K]

Answer:

yes

Step-by-step explanation:

it is rational

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lukranit [14]
That would be 1

I hope I've helped!
3 0
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First, he heated 6 cups of milk and 1 pint of cream in a large pot. Then, he stirred in 4 cups of melted chocolate. How many cup
jasenka [17]

Answer:

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Step-by-step explanation:

7 0
3 years ago
A transformer increases the input voltage from 12V to 12,000V. What is the ratio of the number of wire turns on the primary coil
erma4kov [3.2K]

Answer:

\frac{n_p}{n_s}=\frac{1}{1000}

Step-by-step explanation:

Given voltage of primary coil is V_p=12V

And voltage of secondary coil is V_s=12,000V

A transformer is a device that contains primary and secondary coil. These coils are mounted on soft iron. The change in voltage depends upon the number of turns of primary coil (n_p) and secondary coil (n_s).

Following equation represents the relation between them.

\frac{V_s}{V_p} =\frac{n_s}{n_p}\\\\\frac{12,000}{12}=\frac{n_s}{n_p}\\\\1000=\frac{n_s}{n_p}

Then, ratio of the number of wire turns on the primary coil to the number of turns on the secondary coil is

\frac{n_p}{n_s}=\frac{1}{1000}

5 0
4 years ago
Carol is making a pattern with toothpicks. The first five terms of Carol's pattern are shown.
stellarik [79]

Answer:

B

Step-by-step explanation:

Let's make a table:

Term 1:     3 toothpicks

Term 2:     4 toothpicks

Term 3:     5 toothpicks

Term 4:     6 toothpicks

Term 5:     7 toothpicks

Term N = N + 2 toothpicks

6 0
3 years ago
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