Can you guys please help me?

Mathematics

2 answers:

Likurg_2 [28]3 years ago

6 0

Answer:

First blank(reading from top to bottom left to right) : 21 second blank: 21 third blank: 5 fourth blank: 4 fifth blank: 5.25 or 5 and 1/4 or 21/4

Step-by-step explanation:

To solve this you will first need to make 4 and 1/5 into a improper fraction. To do that you multiply 4 and 5 and get 20. Then you add the 1, and get 21. That will go in your first blank. Next you will remember your KCF (Keep Change Flip) rule. Keep the 20/5, change the division sign to a multiplication sign, and flip 4/5 to 5/4. Next you will just multiply across. 21*5=105 5*4=20 The Directions say to have your answer in simplest form. 105/20 is not in it's simplest form. To make 105/20 in simplest form you would just divide. Your answer on a calculator makes out to be: 5.25. That is just 5 and 1/4 in fraction form, or 21/4 in improper fraction form.

Alinara [238K]3 years ago

3 0

Answer:

answer below

Step-by-step explanation:

They want you to put the first fraction in mixed numbers.

21/5 divided by 4/5

When dividing fractions flip the second fraction

21/5 times 5/4

Then multiply across

105/20 = 21/4 or 5.25

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3 years ago

Solve the following quadratic equation by the square root method. (Y-9)^2=64

enot [183]

Hello!

To solve this, first perform the opposite operation for the last operation (on the left side) on both sides. The last operation of the left side is squaring. Therefore, square root both sides.

$(y - 9)^{2} = 64$

$y - 9 = ±\sqrt{64}$

$y - 9 = ±8$

Please note that you must include ±. This is because the square root of 64 can be either positive or negative, as a square of either a positive or negative number is positive.

Now, add 9 to both sides.

$y = 9±8$