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3 years ago

12

Plz I need help!! what is 1,2,3????!??????????

1 answer:

Papessa [141]3 years ago

3 0

1. NO(line) due to a postulate
2. 23 because it has half of the presented value
3. 4 logic

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Evaluate (4×+4)(7×-3)

Ghella [55]

Answer:

$28x^{2} +16x-12$

Step-by-step explanation:

$(4x+4)(7x+3)$

Apply FOIL method: $(a+b)(c+d)=ac+ad+bc+bd$

$a=4x,b=4,c=7x,d=-3$

$=4x*7x+4x(-3)+4*7+4(-3)$

Apply minus - plus rules

$+(-a)=-a$

$=4*7xx-4*3x+4*7-4*3$

Simplify $4*7xx-4*3x+4*7-4*3$

$4*7xx$

Multiply the numbers: $4*7=28$

Apply exponent rule: $a^{b} *a^{c} =a^{b+c}$

$xx=x^{1+1}$

$=28x^{1+1}$

Add the numbers: $1+1=2$

$=28x^{2}$

$4*3x$

Multiply the numbers: $4*3=12$

$=12x$

$4*7x$

Multiply the numbers: $4*7=28$

$=28x$

$4*3$

Multiply the numbers: $4*3=12$

$=12$

$=28x^{2} -12x+28x-12$

Add similar elements: $-12x+28x=16x$

$=28x^{2} +16x-12$

$28x^{2} +16x-12$

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3 years ago

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Step-by-step explanation:

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Step-by-step explanation:

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Mary spent $45 at the mall. She bought lunch for $9 . She bought 3 shirts at x dollars

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Step-by-step explanation:

3 shirts at x dollars each cost 3x

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altogether she spent 3x + 9

she spent 45

3x + 9 = 45

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Which of these demonstrates the identity property of multiplication

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Answer:

7*1/7=1

Step-by-step explanation:

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