3 years ago

Which expression is equivalent to 21 × 7?

Mathematics

1 answer:

Sergio039 [100]3 years ago

6 0

Answer:

Step-by-step explanation:

its the same thing if you multiply 3×4 and 4×3 for example

and you get the same result both times

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Hello people ~<br>factorise↷<br> x^2 + 4x –21

EleoNora [17]

Let's see

$\\ \rm\rightarrowtail x^2+4x-21$

$\\ \rm\rightarrowtail x^2+7x-3x-21$

$\\ \rm\rightarrowtail x(x+7)-3(x+7)$

$\\ \rm\rightarrowtail (x-3)(x+7)$

8 0

2 years ago

**FIRST CORRECT ANSWER GETS BRAINLEST**

puteri [66]

Answer:

C.) y = 5/4 x

Step-by-step explanation:

5/4 multiplied by 0.4 is 0.5

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2 years ago

Write an expression, involving exponents to represent the shaded area, in square inches of the diagram.

vodka [1.7K]

Answer:

The area is 21 inches

Step-by-step explanation:

3x3=9

3x2=6

9+6=15 ( inches in the white box )

6x6=36 ( area of the whole box)

36-15= 21 ( inches in the shaded area )

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3 years ago

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Choose the sentence that correctly uses pronouns.

Veronika [31]

Answer:

Step-by-step explanation:

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2 years ago

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Solve the following equations. 2x - y = 8 3x + y = 17

aleksley [76]

<h2>Answer: (5, 2)</h2>

<h2>System of equations:</h2>

2x - y = 8

3x + y = 17

<h2>Solve for x:</h2>

2x - y = 8

3x + y = 17

________ +

5x = 25

x = 5

<h2>Plug in x to one of the equations to solve for Y</h2>

2(5) - y = 8

10 - y = 8

-y = -2

y = 2

6 0

2 years ago