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kogti [31]
2 years ago
15

PLEASE HELP LAW OF COSINES

Mathematics
2 answers:
RoseWind [281]2 years ago
8 0

Answer:

34 degrees

Step-by-step explanation:

edg quiz

chubhunter [2.5K]2 years ago
7 0
The Law of Cosine states
cosC=(a^2+b^2-c^2)/2ab

so plugging in the numbers gives us

cosJ=(13^2+19^2-11^2)/2(13*19) = 409/494

We now have cosJ so plug that into your calculator and find arccos (arccos(cos(J)) = J)
arccos(409/494)=34.11
rounding your answer will give you 34°
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You are driving at a constant speed of 75 mph. how far will you drive in 4 hrs
NISA [10]

Answer:

300miles

Step-by-step explanation:

If you are driving 75 miles per hour, and you need to know how many miles you will have drive in 4 hours. Multiply 4 by 75 to get 300.

75mi       4 hr

____ x___  = 75mi x 4  = 300miles

1 hr        y

5 0
3 years ago
Hep me on this please
Alona [7]

Answer:

The answer is 2240m².

Step-by-step explanation:

Given that the formula of area of trapezium is A = 1/2×(a+b)×h where a and b represents the length and h is height :

area =  \frac{1}{2}  \times (a + b) \times h

let \: a = 50 \\ let \: b = 90 \\ let \: h = 32

area =  \frac{1}{2}  \times (50 + 90) \times 32

area =  \frac{1}{2}  \times 140 \times 32

area = 70 \times 32

area = 2240 \:  {m}^{2}

5 0
2 years ago
Read 2 more answers
The polynomial expression (ax²+2)(x²-3x+1) - (12x⁴-36x³)
satela [25.4K]
I would recommend MathPapa for this.
6 0
2 years ago
On a snow day, Owen created two snowmen in his backyard. Snowman A was built to
faust18 [17]

Answer:

<u>The equations for each function:</u>

  • A(t) = 60 - 6t
  • B(t) = 42 - 3t

<em>The lines plotted, see attached</em>

<u>The point at which both the snowmen have same height:</u>

  • 60 - 6t = 42 - 3t
  • 6t - 3t = 60 - 42
  • 3t = 18
  • t = 6

<u>The required interval is </u>

  • t = [0, 6)

7 0
2 years ago
Guys help please I am struggling
alina1380 [7]

9514 1404 393

Answer:

  14.1 years

Step-by-step explanation:

Use the compound interest formula and solve for t. Logarithms are involved.

  A = P(1 +r/n)^(nt)

amount when P is invested for t years at annual rate r compounded n times per year.

Using the given values, we have ...

  13060 = 8800(1 +0.028/365)^(365t)

  13060/8800 = (1 +0.028/365)^(365t) . . . . divide by P=8800

Now we take logarithms to make this a linear equation.

  log(13060/8800) = (365t)log(1 +0.028/365)

Dividing by the coefficient of t gives us ...

  t = log(13060/8800)/(365·log(1 +0.028/365)) ≈ 0.171461/0.0121598

  t ≈ 14.1

It would take about 14.1 years for the value to reach $13,060.

8 0
3 years ago
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