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Marianna [84]
2 years ago
15

Find the cosine of ∠J.

Mathematics
1 answer:
frozen [14]2 years ago
7 0

Answer:

√94

Step-by-step explanation:

i think that is the answer

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Show work and explain with formulas.
Juli2301 [7.4K]

20 Answer: a₁ = 4

<u>Step-by-step explanation:</u>

a_n=324,\ r=3,\ n=5\\\\a_n=a_1 \cdot r^{n-1}\\\\324=a_1\cdot 3^{5-1}\\\\\dfrac{324}{3^4}=a_1\\\\\dfrac{324}{81}=a_1\\\\\large\boxed{4}=a_1

21 Answer: n = 13

<u>Step-by-step explanation:</u>

a_n=\dfrac{1}{64},\ a_1=64,\ r=\dfrac{1}{2}\\\\a_n=a_1 \cdot r^{n-1}\\\\\dfrac{1}{64}=64\cdot \bigg(\dfrac{1}{2}\bigg)^{n-1}\\\\\dfrac{1}{64\cdot 64}=\bigg(\dfrac{1}{2}\bigg)^{n-1}\\\\\dfrac{1}{2^6\cdot 2^6}=\dfrac{1}{2^{n-1}}\\\\6+6=n-1\\\\\large\boxed{13}=n

22 Answer: n = 5

<u>Step-by-step explanation:</u>

a_n=48,\ a_1=1875\ r=\dfrac{2}{5}\\\\a_n=a_1 \cdot r^{n-1}\\\\48=1875\cdot \bigg(\dfrac{2}{5}\bigg)^{n-1}\\\\\dfrac{48}{1875}=\bigg(\dfrac{2}{5}\bigg)^{n-1}\\\\\dfrac{16}{625}=\bigg(\dfrac{2}{5}\bigg)^{n-1}}\\\\\bigg(\dfrac{2}{5}\bigg)^4=\bigg(\dfrac{2}{5}\bigg)^{n-1}}\\\\4=n-1\\\\\large\boxed{5}=n

6 0
3 years ago
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Kyra has a rock collection when she puts her rocks into 2 equal piles there are no rocks left over when she puts her rocks into
jeyben [28]
Kyra has 12 rocks in her rock collection.
6 0
3 years ago
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Kate bought $23.40 worth of two types of bird seed. Thistle bird seed sells for $1.60 per pound and wild bird seed sells for $0.
earnstyle [38]

Answer:

Ax+By=C and 7.5 lb of Thistle

Step-by-step explanation:

6 0
2 years ago
Which of the following is the best definition of a circle?
Leona [35]

Answer:

The set of all points on a plane equidistant to a given point

Step-by-step explanation:

"following"?

8 0
3 years ago
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What is the measurement of LaTeX: \angle∠ADC?
jek_recluse [69]

Answer:

<ADC=131°

Step-by-step explanation:

<ADC= <ADB+<BDC

We need to substitute the angle measures and simplify to get:

<ADC=89+42

This simplifies to give us:

m \angle \: ADC = 131  \degree

The correct answer from the given options is the first choice.

3 0
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