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3 years ago

What is 4 1/5 - 1 4/5 =

2 answers:

7 0

First, change both mixed numbers to improper fractions

4 1/5 = 21/5
1 4/5 = 9/5

because they already have a common denominator, just subtract them

21/5 - 9/5 = 12/5

Kamila [148]3 years ago

6 0

Answer:

The exact form is 12/5 but the simplified one is 2 2/5

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What is 1.6 powered by 2

ss7ja [257]

Answer:

2.56

Step-by-step explanation:

1.6^2 = 1.6 * 1.6 = 2.56

7 0

3 years ago

Free points, One last question, 3k+16=8+5k

Tema [17]

Answer:

k = 4

Step-by-step explanation:

Hello!

3k + 16 = 8 + 5k

Subtract 3k from both sides

16 = 8 + 2k

Subtract 8 from both sides

8 = 2k

Divide both sides by 2

4 = k

The answer is 4

Hope this Helps!

3 0

3 years ago

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The graph shows a reflection.<br><br> True or false: The pre-image and the image are not congruent.

LuckyWell [14K]

Answer:

False

Step-by-step explanation:

That is false

If the pre-image is reflected over any axis, the image will still be congruent to it

8 0

3 years ago

Solve by completing a square r^2-8r+9

Tanzania [10]

Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Step-by-step explanation:

We need to solve the equation $r^2-8r+9$ by completing a square

The completing a square method requires: $a^2\pm 2ab +b^2=(a\pm b)^2$

Solving:

$r^2-8r+9\\=(r)^2-2(r)(?)+(?)^2+9$

We need to add and subtract (4)^2=16 to make the equation a complete square

$=(r)^2-2(r)(4)+(4)^2-(4)^2+9\\=(r)^2-2(r)(4)+(4)^2-16+9\\=(r)^2-2(r)(4)+(4)^2-7\\=(r+4)^2-7$

So, Solving $r^2-8r+9$ by completing a square gives $(r+4)^2-7$

Keywords: Solve by completing a square

Learn more about Solve by completing a square at:

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7 0

3 years ago

10 inches equals how many millimeters?

solong [7]

1 in equals 25.4 mm

so in this case you multiply 25.4 times 10

to get 254

4 0

3 years ago

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