How do i expand brackets in quadratic form because i need help with it

1 answer:

5 0

To expand a bracket means to multiply each term in the bracket by the expression outside the bracket. For example, in the expression 3 ( m + 7 ) , multiply both. 3 ( m + 7 ) = 3 × m + 3 × 7 = 3 m + 21 .

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1. Mila spends $71.05 at the craft store.

marshall27 [118]

Answer:

$3.4

Step-by-step explanation:

Total amount spent by Mila equals $71.05

She bought 5 yards of fabric at $12.85 per yard. Hence, the total amount she spent on fabric is 12.85 × 5 = $64.25

It should be noted that since she bought only 2 kinds of things, this mean that Amount spent of fabric + Amount spent on thread = $71.05

Amount spent on thread = $71.05 - Amount spent on fabrics.

Amount spent on thread = $71.05 - $64.25 = $6.8

This is the total amount spent on thread.

But the question asks amount spent on one spool of thread. Since 2 spools would cost $6.8, one spool would cost $6.8 ÷ 2 = $3.4

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3 years ago

The perimeter of a square is 100. The side length is represented by 2x+3. Solve for x.

aliina [53]

Answer:

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4×(2x+3) = 100

2x+3 = 25

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3 years ago

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Aleksandr [31]

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