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2 years ago

Which expression is equal to 7(1+3) ?7+217+31+217+4

Mathematics

1 answer:

Marysya12 [62]2 years ago

8 0

The right answer is first option: 7+21

Step-by-step explanation:

Given expression is;

7(1+3)

In mathematics, the term outside is multiplied by each term inside the bracket, therefore, in this expression;

$7(1+3)\\7*1+7*3\\7+21\\$

The given expression 7(1+3) is equals to 7+21.

The right answer is first option: 7+21

Keywords: multiplication, addition

Learn more about addition at:

#LearnwithBrainly

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2 years ago

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Answer:

For A = 32/5 and B = 8 the system of equations will have infinitely many solutions.

Step-by-step explanation:

Given equations are:

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Ax + By = 16

The general form of linear equation in two variables is given by:

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Here a, b and c are constants and x,y are variables.

In the given equations, after comparing with the general form

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"In order for a system of equations to have infinity many solutions,

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Putting the values we get

$\frac{4}{A} = \frac{5}{B} = \frac{10}{16}\\\frac{4}{A} = \frac{5}{B} = \frac{5}{8}\\Now\\\frac{4}{A} = \frac{5}{8}\\\frac{A}{4} = \frac{8}{5}\\A = \frac{8}{5} * 4\\A = \frac{32}{5}\\And\\\frac{5}{B} = \frac{5}{8}\\\frac{B}{5} = \frac{8}{5}\\B = 8$

Hence,

For A = 32/5 and B = 8 the system of equations will have infinitely many solutions.

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2 years ago

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Which expression is equal to 7(1+3) ?7+217+31+217+4​

Which expression is equal to 7(1+3) ?7+217+31+217+4