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3 years ago

The matrices shows the number of dance students enrolled in each type of class for two different years.

Mathematics

2 answers:

just olya [345]3 years ago

7 0

Answer:

The correct answer is C.

Step-by-step explanation:

In order to find the answer, we need to subtract the corresponding areas. In order to find the change, we subtract the first matrix from the second. If we look at the numbers in the top right we see.

9 - 21 = -12

Since C is the only one with -12 in the top right corner, it must be the correct matrix.

Scorpion4ik [409]3 years ago

3 0

Answer:

n54

Step-by-step explanation:

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HELP PLEASEEE. I DONT UNDERSTAND

Shtirlitz [24]

Answer:

Step-by-step explanation:

So we have the equation:

$x^2-6x+58=0$

And we want to solve for x.

We can solve it by completing the square.

First, subtract 58 from both sides:

$x^2-6x=-58$

Divide the b term by 2 and square it:

$(-6)/2=-3\\(-3)^2=9$

So, add 9 to both sides:

$(x^2-6x+9)=-58+9$

On the left, the perfect square trinomial pattern. Add on the right. So:

$(x-3)^2=-49$

Take the square root of both sides:

$x-3=\pm \sqrt{-49}$

The square root of -49 is 7i:

$x-3=\pm 7i$

Add 3 to both sides:

$x=3\pm 7i$

So, our answer is D.

And we're done!

4 0

3 years ago

The width of a rectangle is 6 2/3 inches. The length of the is twice it’s width. What so the perimeter of the rectangle?

Nookie1986 [14]

$\text {Width = } 6\dfrac{2}{3} \text { inches}
$

The length is twice its width:
$\text {Length = } 2 \times 6\dfrac{2}{3} \text { inches}$

Change to improper fraction:
$\text {Length = }2 \times \dfrac{20}{3} \text { inches}$

Combine into single fraction:
$\text {Length = } \dfrac{40}{3} \text { inches}$

Find Perimeter :
$\text {Perimeter = Length + Length + Width + Width}$

$\text {Perimeter = } \dfrac{40}{3} + \dfrac{40}{3} + \dfrac{20}{3} + \dfrac{20}{3} = \dfrac{120}{3} = 40 \text { inches}$

$\bf \text {Answer: Perimeter = 40 inches}$

6 0

3 years ago

Read 2 more answers

Can anybody help with this

iris [78.8K]

100 =d

your welcome lol

8 0

3 years ago

What is the domain of this exponential function , y=7^x

Zielflug [23.3K]

Answer: hope this helps

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Packages of plants are on sale for $6 per package at the Garden Shop. For variety, 3 friends want to buy 5 packages to share. Ho

liubo4ka [24]

-- The plants cost $6 for each package.

-- The friends want to buy 5 packages.
The total cost is (5 x $6) = $30 .

-- If the friends divide up the cost equally,
each of them will pay 1/3 of the total cost = (1/3 x $30) = $10 .

8 0

4 years ago