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3 years ago

Which is the value of this expression when a =5 and k=2?

Mathematics

2 answers:

sdas [7]3 years ago

6 0

Answer: The answer to this question would be 25/9 in exact form, 2.7 repeating in decimal form, or 2 and 7/9 as a mixed number. To solve all you would need to do is substitute the values of the variables into the expression and then simplify.

MAXImum [283]3 years ago

4 0

Just substitute 5 into a and -2 into k

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What is 7,390.7 divided by 0.874 ?

Alinara [238K]

About 8,456.17849
Rounded: 8,456.18

3 0

4 years ago

What are the solutions to the quadratic equation below x^2+20x+100=7

aleksandrvk [35]

First you must have the quadratic equal to zero. In order to do this you must subtract 7 to both sides

x^2 + 20x + (100 - 7) = 7 - 7

x^2 + 20x + 93 = 0

Now you must find two numbers who's sum equals 20 and their multiplication equal 93

Are there any? NO!

This means that you have to use the formula:

$\frac{-b±\sqrt{b^{2} - 4ac} }{2a}$

In this case:

a = 1

b = 20

c = 93

$\frac{-(20) plus/minus\sqrt{20^{2} - 4(1)(93)} }{2*1}$

$\frac{-20 plus/minus\sqrt{400 - 372} }{2}$

$\frac{-20 plus/minus\sqrt{28} }{2}$

^^^We must simplify √28

√28 = 2√7

so...

$\frac{-20 plus/minus 2\sqrt{7} }{2}$

simplify further:

$-10 plus/minus\sqrt{7$

-10 + √7

-10 - √7

***plus/minus = ±

Hope this helped!

~Just a girl in love with Shawn Mendes

7 0

3 years ago

The wind blew away 24 of your muffins. That was 3/4 of them! How many are left?

forsale [732]

Set up a proportion:

3/4/24 = 1/x

Cross multiply:

3/4x = 24

Divide 3/4 to both sides or multiply by its reciprocal, 4/3:

x = 24 * 4/3

x = 96/3

x = 32

So you had a total of 32 muffins, now subtract this from the amount that blew away to find out how many you have left:

32 - 24 = 8

So you have 8 muffins left.

3 0

3 years ago

K - 263.48 = 381.09 solve this equation

Sedbober [7]

K-263.48=381.09
we add 263.48 on both sides
k=644.57

7 0

4 years ago

Read 2 more answers

If it takes 12 minutes to cut a log into 4 pieces, how many minutes will it take to cut a log into 3 pieces?

balu736 [363]

Answer:

9 minutes