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notka56 [123]
3 years ago
9

PLZZZZZZ NEED HELP!!!!!!!!

Mathematics
1 answer:
kogti [31]3 years ago
3 0

ANSWER

5.5

EXPLANATION

We can use the cosine rule to find the missing side length.

The cosine rule is given as;

{a}^{2}  =  {b}^{2}  +  {c}^{2}  - 2bc \cos( A)

Let the missing side be "a".

Then,

{a}^{2}  =  {9}^{2}  +  {6}^{2}  - 2 \times 9 \times 6 \cos(37 \degree)

{a}^{2}  =  81+  36- 86.253

{a}^{2}  =  30.74736

a =  \sqrt{30.747}

a \approx5.5

Therefore the missing side length is approximately 5.5 units to the nearest tenth.

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At a local pet store guppies are on sell for $0.70 each and sword tails $1.80 each. If amanda buys 4 guppies and 3 sword tails h
Lesechka [4]

Answer:

$8.20

Step-by-step explanation:

0.70*4=2.80

1.80*3=5.40

5.40+2.80=8.20

$8.20

5 0
3 years ago
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Given f (x) = x2 + 4x + 5, what is f of the quantity 2 plus h end quantity minus f of 2 all over h equal to?
meriva

By evaluating the quadratic function, we will see that the differential quotient is:

\frac{f(2 + h) - f(2)}{h} = 8 + h

<h3>How to get (f(2 + h) - f(2))/h?</h3>

Here we have the quadratic function:

f(x) = x^2 + 4x + 5

Evaluating the quadratic equation we get:

\frac{f(2 + h) - f(2)}{h}

So we need to replace the x-variable by "2 + h" and "2" respectively.

Replacing the function in the differential quotient:

\frac{(2 + h)^2 + 4*(2 + h) + 5 - (2)^2 - 4*2 - 5}{h} \\\\\frac{4 + 2*2h + h^2 + 8 + 4h  - 4 - 8 }{h} \\\\\frac{ 2*2h + h^2  + 4h   }{h} = \frac{8h + h^2}{h}

If we simplify that last fraction, we get:

\frac{8h + h^2}{h} = 8 + h

The third option is the correct one, the differential quotient is equal to 8 + 4.

If you want to learn more about quadratic functions:

brainly.com/question/1214333

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8 0
2 years ago
Solve the following system x=3 y=3x-1
astraxan [27]

Answer:

x = 3

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Step-by-step explanation:

Since it gives you x, you need to plug in the number given for it into the equation:

y = 3x - 1

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5 0
3 years ago
Please help me. i will mark you as most brilliance and give you 5 stars! Please be specific when answering. thank you! :)
serg [7]

Step-by-step explanation:

5x+52=9x+20

subtract 5x on both sides

subtract 20 on both sides

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divide by 4 on both sides

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A and D are 92°

C is 56°

B and C will add up to 90, so

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