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3 years ago

If Sandra practices the piano each day for 2/3 of an hour, how many hours of practice will she get in each week?

Mathematics

1 answer:

dimulka [17.4K]3 years ago

8 0

Answer:

4 2/3

Step-by-step explanation:

2/3 * 7/1

4 2/3

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Shahad put $65 in her lunch account. She spends $3 each day on lunch. If her account goes below $5, she will get a notice sent h

Anna [14]

Answer:

if the question is how long can she eat without a notice being sent home, its about 21 days

Step-by-step explanation:

6 0

3 years ago

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Helpppppppppppppppppp

UNO [17]

Answer:

2 solutions

Step-by-step explanation:

Given the expression

2m/2m+3 - 2m/2m-3 = 1

Find the LCM of the expression at the left hand side:

2m(2m-3)-2m(2m+3)/(2m+3)(2m-3) = 1

open the bracket

4m²-6m-4m²-6m/(4m²-9) = 1

Cross multiply

4m²-6m-4m²-6m = 4m² - 9

-12m = 4m² - 9

4m² - 9+12m = 0

4m² +12m-9 = 0

Since the resulting equation is a quadratic equation, it will have 2 solutions since the degree of the equation is 2

8 0

3 years ago

For the function below, state the x-coordinate of the x-intercept that is located to the fight of the origin.

OLga [1]

Answer:

x = 3

Step-by-step explanation:

It should NOT be "fight of the origin", rather "right of the origin".

Now let's move on to solve the question...

The x-intercept is found by setting the function equal to 0. Thus:

0 = x^3 - 9x

Let's solve this using algebra:

$0=x^3-9x\\0=x(x^2-9)\\0=x(x-3)(x+3)$

Hence, x = -3 and x = 3

The coordinate that is to the right of the origin is the positive one, so x = 3 is the x-intercept we are looking for.

3 0

3 years ago

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Find all the zeros of the equation

lapo4ka [179]

Divide both sides by -3, and replace $x^2$ with $y$ . Then

$-3x^4+27x^2+1200=0\iff y^2-9y-400=0$

Factorize the quadratic in $y$ to get

$y^2-9y-400=(y+16)(y-25)=0\implies y=-16,y=25$

which in turn means

$x^2=-16,x^2=25$

But $x^2\ge0$ for all real $x$ , so we can ignore the first solution. This leaves us with

$x^2=25\implies x=\pm\sqrt{25}=\pm5$

If we allow for any complex solution, then we can continue with the solution we ignored:

$x^2=-16\implies x=\pm\sqrt{-16}=\pm i\sqrt{16}=\pm4i$

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4 years ago

What type of angles are< 1 and <5?

belka [17]

Answer:

The type of angles of <1 and <5 are corresponding angles

Step-by-step explanation:

3 0

3 years ago