3 years ago

What is 3.00 - 2.50 explain your work

Mathematics

1 answer:

arsen [322]3 years ago

5 0

Answer:

0.5

Step-by-step explanation:

Subtract 2.5 from 3

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Find the solution of this system of equations <br> -6y=-50-4x <br> 5x-6y=-49

Maslowich

Answer:

Step-by-step explanation:

Rewrite the first equation

$-6y=-50-4x\\\\4x-6y=-50$

Now we have the following system of equations

$4x-6y=-50\\5x-6y=-49$

To solve the system of equations multiply the first equation by -1 and add it to the second equation

$-1*4x-(-1)*6y=-50*(-1)\\\\-4x+ 6y=50$

$-4x+ 6y=50$

$5x-6y=-49$

-----------------------------------

$x + 0 =1\\\\x=1$

Now substitute the value of x in any of the two equations and solve for y

$5(1)-6y=-49$

$5-6y=-49$

$-6y=-49-5$

$-6y=-54$

$y=\frac{54}{6}$

$y=9$

The solution is:

$(1,\ 9)$

6 0

3 years ago

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Simplify the radical expression 4 square root 81x^20y^8

Dimas [21]

The simplified expression is $3x^5 y^2$

Step-by-step explanation:

The radical expression to simplify is

$\sqrt[4]{81x^{20}y^8}$

We notice the following:

$81=3^4$

And using the property

$(x^a)^b=x^{a\cdot b}$

we can write:

$x^{20}=(x^5)^4$

$y^8 = (y^2)^4$

So the argument of the radical can be written as

$\sqrt[4]{(3)^4(x^5)^4(y^2)^4} =\sqrt[4]{(3x^5y^2)^4}$

And now by using the property

$\sqrt[n]{a^n}=a$

We find:

$\sqrt[4]{(3x^5y^2)^4}=3x^5 y^2$

Learn more about simplification of expressions:

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3 years ago

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Here's my question. A city's sales tax is 7%. Write this percent as a fraction and tell how many cents of tax are on each dollar

Alika [10]

The answer is 7 cents of tax

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3 years ago

Please help me to solve <br>✓ C<br>✓ D<br>✓ E

mafiozo [28]

Answer:

1)Mononaimal polynomial

2)Mononomial polynomial

3)Bionomial polynomial

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3 years ago

The length of a rectangle is 3 meters more than the width. The perimeter of the rectangle is 26 meters.

Maksim231197 [3]

l=b+3

perimeter=26

2(l+b)=26

l+b=13

b+3+b=13

2b=10

b=5m

l=b+3

= 5+3

=8m

8 0

3 years ago