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4 years ago

Simplify the expression (8-√5)(8+√5) 39 59 64+√5 69+16√5

Mathematics

1 answer:

irakobra [83]4 years ago

4 0

Using the identity a^2 - b^2 = (a - b)(a + b):-

this is 8^2 - (sqrt5)^2 = 64 - 5 = 59 Answer

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When two people each measured a windows width, their results were 79 cm and 786 mm. Are these results equally precise? Explain.

rosijanka [135]

The second result is more precise because it's in millilitre,so if the first were to be fully precise,it should have been 78.6 cm.

Hope this helps!

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3 years ago

How many hours would it take Natalie if she worked alone?

Annette [7]

It would take Natalie 6 hours by herself since she will finish in twice the time if she had Caesar to help.

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2 years ago

Mrs Hong had some milk. She used of it to bake some waffles and

Sergio [31]

Answer:

Mrs. Hong originally had 900 ml of milk

Explanation:

The complete question is in the attached image

Assume that the amount of milk Mrs. Hong originally had was x ml

We are given that:

1- She used $\frac{1}{6}$ of it to bake the waffles, therefore:

Amount used in baking waffles = $\frac{1}{6}x$ ml

2- She used 300 ml to bake a pie

3- Amount left is half the original amount, therefore:

Amount left = $\frac{1}{2}x$ ml

We know that:

Total amount = amount used in waffles + amount used in pie + amount left

Substitute with the givens and solve for x:

Total amount = amount used in waffles + amount used in pie + amount left

$x = \frac{1}{6}x + 300 + \frac{1}{2}x\\ \\x-\frac{1}{6}x-\frac{1}{2}x = 300\\ \\\frac{1}{3}x = 300\\ \\x = 300*3 = 900 ml$

This means that:

She originally had 900 ml of milk

Hope this helps :)

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3 years ago

Describe the steps on how to graph the ordered pair ( - 3, 4)

larisa [96]

Answer:

find -3 on the graph on the left side. and go four up from there

Step-by-step explanation:

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3 years ago

PLS HELP!!!!!!!!!!!!!

fgiga [73]

Answer:

7+1- -7

Step-by-step explanation:

i just guessed :)

3 0

3 years ago