(5x3 + 3)2 = (5x3)2 + (3)2 = 25x6 + 9 Determine if Louise’s answer is correct. Explain.

1 answer:

3 0

Louise’s answer is not correct. She is missing the term 30x3. When squaring a binomial, it is best to write the product of the binomial times itself. Then you can use the distributive property to multiply each term in the first binomial by each term in the second binomial. Louise also could have used the formula for a perfect square trinomial, which is found by squaring a binomial.

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Ken has $950 in a savings account at the beginning of the summer. He wants to have at least $600 in the account by the end of th

Neko [114]

Every week he withdraws $35 from the $950 in his savings, and he wants at least $600 by the end of the summer. So we could write:

$\sf 950-35x\ge 600$

Where 'x' is the number of weeks. Now let's solve it for 'x'.

Subtract 950 to both sides:

$\sf -35x\ge -350$

Divide -35 to both sides, don't forget to switch the sign when dividing/multiplying by a negative number:

$\sf x\le 10$

So he can only withdraw at money for at most 10 weeks if he wants at least $600 left in his account.

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Montano1993 [528]

Answer:

1 ) 1/2

2) 1/4

3)10, 15 , 20, 25 , 30 ,35 ......

4) 16,24,32,...

5)40

6) 42

7)17/24