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Anastaziya [24]
3 years ago
5

I NEED HELPPPP PLEASE

Mathematics
2 answers:
Nuetrik [128]3 years ago
7 0
8(2) + 3(5) - 10 + 4^2 =
16 + 15 - 10 + 16 =
31 - 10 + 16 =
21 + 16 =
37
denpristay [2]3 years ago
3 0
Plug them in then solve from left to light
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If y varies directly as the square root of x and y=12 when x = 16 , find x when y = 15
a_sh-v [17]
= 19 this is the answer I'm guessing since 16-12= 4 so 16 is 4 more than 12
3 0
3 years ago
Please help i put a picture below
PSYCHO15rus [73]

Answer:

Step-by-step explanation:

This is not nearly as threatening and scary as I first thought it was.  You must be in the section in Geometry where you are taught that perimeter of similar figures exist in a one-to-one relationship while areas of similar figures exist in a squared-to-squared relationship.  We will use that here.  

The area formula for a regular polygon is

A=\frac{1}{2}ap where a is the apothem and p is the perimeter.  We are first asked for the area of the polygon, but it would make more sense to find the perimeter first, since we need it to find the area.

P = 5(8) so

P = 40

We are given that the area of the triangle inside that polygon is 22.022 units squared.  Knowing that the area formula for a triangle is

A=\frac{1}{2}bh we can sub in what we know and solve to find the height:

22.022=\frac{1}{2}(8)h and

22.022 = 4h so

h = 5.5055 units

It just so happens that the height of that triangle is also the apothem of the polygon, so now we have what we need to find the area of the polygon:

A=\frac{1}{2}(5.5055)(40)

which gives us an area of

A = 110.11 units squared.

Here is where we can use what we know about similar figures and the relationships between perimeters and areas.  We will set up a proportion with the smaller polygon info on top and the larger info on bottom.  We know that the larger is 3 times the smaller, so the ratio of smaller to larger is

\frac{s}{l}:\frac{1}{3}

Since perimeter is one-to-one and we know the perimeter of the smaller, we can create a proportion to solve for the perimeter of the larger:

\frac{s}{l}:\frac{1}{3}=\frac{40}{x}

Cross multiply to get that the perimeter is 120 units.  You could also have done this by knowing that if the larger is 3 times the size of the smaller, then the side measure of the larger is 24, and 24 * 5 = 120.  But we used the way we used because now we have a means to find the area of the larger since we know the area of the smaller.

Area exists in a squared-to-squared relationship of the perimeter which is one-to-one.  If the perimeter ratio is 1:3, then the area relationship is

\frac{s}{l}:\frac{1^2}{3^2} which is, simplified:

\frac{s}{l}:\frac{1}{9}

Since we know the area for the smaller, we can sub it into a proportion and cross multiply to solve for the area of the larger.

\frac{s}{l} :\frac{1}{9} =\frac{110.11}{x}

A of the larger is 990.99 units squared

5 0
3 years ago
If $10,000 is borrowed at an APR of 18%, for a period of 5 years and payments are made monthly, what will be the monthly payment
Soloha48 [4]

Answer:

$381.29

Step-by-step explanation:

10000(1+.18)5

10000(1.18)5

Amount due $22877.58

since 5 years x 12 months =60 months

monthly payment is 22877.58÷60 = $381.29

4 0
2 years ago
Derivative of y=cos²x-sin²x
Leona [35]
One thing to bear in mind with trigonometric expressions is that, the exponent location is next to the function name, instead of the whole expression, though it applies to the whole thing, namely cos²(x), is really [ cos(x) ]², and that matters for using the chain rule.

\bf y=cos^2(x)-sin^2(x)\implies y=[cos(x)]^2-[sin(x)]^2
\\\\\\
\cfrac{dy}{dx}=\stackrel{chain~rule}{2cos(x)\cdot -sin(x)}~~-~~\stackrel{chain~rule}{2sin(x)\cdot cos(x)}
\\\\\\
\cfrac{dy}{dx}=-2cos(x)sin(x)-2cos(x)sin(x)
\\\\\\
\cfrac{dy}{dx}=-4cos(x)sin(x)
8 0
3 years ago
An online video streaming service offers two plans for unlimited streaming. Plan A has a one-tim $15 membership fee and is $10 p
PIT_PIT [208]

Answer:

y=10x+15

y=11x+6

Step-by-step explanation:

8 0
3 years ago
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