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Iteru [2.4K]
4 years ago
11

Round to 3 decimal places for the final answer

Mathematics
1 answer:
tatiyna4 years ago
5 0

Answer:

9.784

Step-by-step explanation:

remember this formula for right triangles (a^2+b^2=c^2)

so 7.4^2+6.4^2=c^2

54.76+40.96=c^2

95.72=c^2

this is where we do this

\sqrt{95.72}=\sqrt{c^2}

square root of 95.72 is around 9.784

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Tell whether the triangle with the given side lengths is a right triangle.<br> 24, 70, 75
alexgriva [62]

Answer:

Not a right triangle.

Step-by-step explanation:

We can tell if it's a right triangle or not by using the Pythagorean Theorem.

The largest value is always the hypotenuse (c).

a² + b² = c²

24² + 70² = 75²

576 + 4900 = 5625

5476 ≠ 5625

The values do not equal one another. Therefore, this triangle is NOT a right triangle.

6 0
3 years ago
Please help me with this trigonometry question. Brainliest available.
faltersainse [42]
Considering the angle a by cosine rule
11^2 =7 ^2 +15^2 - 2(7)(15)cos(a)
When you do the maths,
Cos(a) =153/210 =0.729
a= cos inverse of 0.729
a=43 degrees


Considering angle b
7^2=15^2 +11^2 -2(11)(15) cos(b)
This will result in cos(b) =297/330=0.9
b= cos inverse of 0.9 = 25.8 degrees


Considering angle c
15^2=7^2 +11^2 - 2(11)(7) cos(c)
Cos(c) will be = -55/154 = -0.357
c= cos inverse of -0.357=110.9

Comparing the angles a,b and c,
C is the largest size in the triangle with an angle of 110.9 degrees

Am I right please ??
5 0
2 years ago
Why are these incorrect 3sqrt 7 - sqrt 7 =3
timurjin [86]
Because the left side sqrt is multiplied by 3 if it was just added it would be correct because it would cancel out and leave the 3’s. Since it’s multiplied it would change the value
5 0
3 years ago
Read 2 more answers
Find the two values of k for which y(x)=ekx is a solution of the differential equation
Travka [436]

Answer:

The 2 values of k are 3 and 6.

Step-by-step explanation:

If the given function  of y is a solution of the differential equation then it shall be able to satisfy it

Thus we have

y''-9y'+18y=0

Putiing y=e^{kx} in the above differential euation we get

\frac{d^2e^{kx}}{dx^2}-9\frac{de^{kx}}{dx}+18\cdot e^{kx}=0\\\\k^{2}e^{kx}-9k\cdot e^{kx}+18\cdot e^{kx}=0\\\\k^2-9k+18=0

Solving the above uadratic euation with the standard formula we get

k=\frac{-(-9)\pm \sqrt{(-9)^2-4\times 1\times 18} }{2}\\\\k_1=6\\\\k_2=3

3 0
4 years ago
Jack can type 35 words per minute. How long would it take Jack to type a 490 word essay?
adoni [48]
490 divided by 35 equals 14. It would take Jack 14 minutes to write a 490 word essay.
8 0
3 years ago
Read 2 more answers
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